Details of the Researcher

PHOTO

Shuichi Sakamoto
Section
Research Institute of Electrical Communication
Job title
Professor
Degree

  • 博士（工学）（東北大学）

  • 修士（情報科学）（東北大学）

Research History 5

  • 2019/08 - Present
    Tohoku University　Research Institute of Electrical Communication　Professor

  • 2011/07 - 2019/07
    Tohoku University　Research Institute of Electrical Communication　Associate Professor

  • 2007/04 - 2011/06
    Tohoku University　Research Institute of Electrical Communication　Assistant Professor

  • 2000/10 - 2007/03
    Tohoku University　Research Institute of Electrical Communication　Research Associate

  • 1997/04 - 2000/09
    Hitachi, Ltd.

Education 3

  • Tohoku University　Graduate School of Engineering

    2000/04 - 2004/03

  • Tohoku University　Graduate School of Information Science

    1995/04 - 1997/03

  • Tohoku University　Department of Engineering

    1991/04 - 1995/03

Committee Memberships 22

  • 電子情報通信学会情報・システムソサイエティマルチメディア情報ハイディング・エンリッチメント研究専門委員会　委員

    2023/05 - Present

  • 電子情報通信学会ヒューマンコミュニケーショングループヒューマン情報処理研究専門委員会　顧問

    2022/06 - Present

  • 宮城県公害審査会　委員

    2022/04 - Present

  • Acoustical Society of Japan　Director

    2021/05 - Present

  • 日本音響学会災害等非常時屋外拡声システムのあり方に関する技術調査研究委員会　委員

    2013/01 - Present

  • 日本音響学会　評議員

    2011/05 - Present

  • 日本音響学会音バリアフリー調査研究委員会　幹事（2009年4月から委員）

    2006/07 - Present

  • 日本バーチャルリアリティ学会VR心理学研究会　委員

    2004/04 - Present

  • 日本音響学会編集委員会　査読委員

    2003/10 - Present

  • 日本音響学会聴覚研究会　副委員長

    2021/04 - 2023/03

  • 日本バーチャルリアリティ学会　論文誌編集委員

    2018/09 - 2023/03

  • 電子情報通信学会ヒューマンコミュニケーショングループヒューマン情報処理研究専門委員会　委員長

    2020/06 - 2022/06

  • 電子情報通信学会情報・システムソサイエティマルチメディア情報ハイディング・エンリッチメント研究専門委員会　専門委員

    2016/05 - 2022/06

  • Editorial Board of Acoustical Society of Japan　Board member

    2011/05 - 2021/05

  • 電子情報通信学会ヒューマンコミュニケーショングループヒューマン情報処理研究専門委員会　副委員長

    2016/05 - 2020/06

  • 日本音響学会東北支部　評議員

    2016/05 - 2020/05

  • 日本音響学会　理事

    2015/05 - 2019/05

  • 電子情報通信学会ヒューマンコミュニケーショングループヒューマン情報処理研究専門委員会　専門委員

    2005/05 - 2016/05

  • 日本音響学会東北支部　会計監査

    2014/05 - 2016/04

  • 日本音響学会東北支部　庶務幹事

    2012/05 - 2014/04

  • 日本音響学会聴覚研究委員会　幹事

    2009/04 - 2012/05

  • 日本音響学会東北支部　会計幹事

    2010/05 - 2012/04

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Professional Memberships 7

  • Acoustical Society of America

  • Japan society of Kansei engineering

  • Otological Society of Japan

  • The Virtual Reality Society of Japan

  • Japan Audiological Society

  • 電子情報通信学会

  • 日本音響学会

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Research Interests 6

  • virtual reality

  • spherical microphone array

  • head-related transfer function

  • audio-visual speech perception

  • three-dimensional audio technology

  • multimodal perceptual information processing

Research Areas 1

  • Informatics / Intelligent informatics / speech perception

Awards 11

  1. 第62回論文賞佐藤賞

    2022/03　日本音響学会　防災行政無線屋外拡声子局における出力レベルの最適化

  2. 学会活動貢献賞

    2021/03　日本音響学会

  3. 平成30年度科研費特別研究員等審査会専門委員（書面担当）表彰

    2019/06　日本学術振興会

  4. 石田實記念財団研究奨励賞

    2017/11　石田實記念財団　3次元音空間の高精度収音・再生技術に関する研究

  5. エンタテインメントコンピューティング2017ベストペーパー賞

    2017/09　エンタテインメントコンピューティング2017実行委員会　視聴覚コンテンツの音情報から生成した振動の高次感性促進効果

  6. 57th Sato Prize Paper Award

    2017/03　Acoustical Society of Japan　Sound-space recording and binaural presentation system based on 252-channel microphone array

  7. 9th International Conference on Intelligent Information Hiding and Multimedia Signal Processing (IIH-MSP 2013) Best Paper Award

    2013/10　Organizing committee, International Conference on Intelligent Information Hiding and Multimedia Signal Processing　Auditory space perception during active and passive self-motion

  8. FIT FUNAI Best Paper Award

    2013/09　The Institute of Electronics, Information and Communication Engineering (IEICE)

  9. Japan-China Joint Conference on Acoustics (JCA2007) Best Paper Award

    2007/12　JCA2007 Editing Committee　Binaural speech enhancement for hearing aids

  10. Away Kiyoshi Science Promotion Award

    2005/03　Acoustical Society of Japan　The relationship of bimora frequencies to word intelligibility considering word familiarity

  11. The 5th Best Presentation Award

    2004/09　Japan Society of Kansei Engineering　The effect of consonance between features impression and voice impression for McGurk effect

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Papers 221

  1. Circumferential Multiple Source Separation Using a Small Microphone Array and 2-D Spectra Peer-reviewed

    Senta Ariizumi, Teruki Toya, Kanji Watanabe, Shuichi Sakamoto, Kenji Ozawa

    2024 IEEE 13th Global Conference on Consumer Electronics (GCCE)　90-91　2024/10/29

    Publisher: IEEE

    DOI： 10.1109/gcce62371.2024.10761022 　

  2. Masking Effects Caused by Contralateral Distractors in Participants With Versus Without Listening Difficulties. International-journal Peer-reviewed

    Tetsuaki Kawase, Chie Obuchi, Jun Suzuki, Yukio Katori, Shuichi Sakamoto

    Ear and hearing　2024/09/20

    DOI： 10.1097/AUD.0000000000001591 　

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    OBJECTIVES: To examine the effects of distractor sounds presented to the contralateral ear on speech intelligibility in patients with listening difficulties without apparent peripheral pathology and in control participants. DESIGN: This study examined and analyzed 15 control participants (age range, 22 to 30 years) without any complaints of listening difficulties and 15 patients (age range, 15 to 33 years) diagnosed as having listening difficulties without apparent peripheral pathology in the outpatient clinic of the Department of Otolaryngology-Head and Neck Surgery, Tohoku University Hospital. Speech intelligibility for 50 Japanese monosyllables presented to the right ear was examined under the following three different conditions: "without contralateral sound," "with continuous white noise in the contralateral ear," and "with music stimuli in the contralateral ear." RESULTS: The results indicated the following: (1) speech intelligibility was significantly worse in the patient group with contralateral music stimuli and noise stimuli; (2) speech intelligibility was significantly worse with contralateral music stimuli than with contralateral noise stimuli in the patient group; (3) there was no significant difference in speech intelligibility among three contralateral masking conditions (without contra-stimuli, with contra-noise, and with contra-music) in the control group, although average and median values of speech intelligibility tended to be worse with contralateral music stimuli than without contralateral stimuli. CONCLUSIONS: Significantly larger masking effects due to a contralateral distractor sound observed in patients with listening difficulties without apparent peripheral pathology may suggest the possible involvement of masking mechanisms other than the energetic masking mechanism occurring in the periphery in these patients. In addition, it was also shown that the masking effect is more pronounced with real environmental sounds, that is, music with lyrics, than with continuous steady noise, which is often used as a masker for speech-in-noise testing in clinical trials. In other words, it should be noted that a speech-in-noise test using such steady noise may underestimate the degree of listening problems of patients with listening difficulties in their daily lives, and a speech-in-noise test using a masker such as music and/or speech sounds could make listening problems more obvious in patients with listening difficulties.

  3. Exploring Visual-Auditory Redirected Walking Using Auditory Cues in Reality Peer-reviewed

    Kumpei Ogawa, Kazuyuki Fujita, Shuichi Sakamoto, Kazuki Takashima, Yoshifumi Kitamura

    IEEE Transactions on Visualization and Computer Graphics　30　(8)　5782-5794　2024/08

    Publisher: Institute of Electrical and Electronics Engineers (IEEE)

    DOI： 10.1109/tvcg.2023.3309267 　

    ISSN： 1077-2626

    eISSN： 1941-0506 2160-9306

  4. Sound field recording using distributed spherical microphone arrays based on a virtual spherical model Invited Peer-reviewed

    Shuichi Sakamoto, Kosuke Katada

    Proc. INTERNOISE2023　1-6　2023/08

  5. Diversity of aphantasia revealed by multiple assessments of visual imagery, multisensory imagery, and cognitive style. International-journal Peer-reviewed

    Junichi Takahashi, Godai Saito, Kazufumi Omura, Daichi Yasunaga, Shinichiro Sugimura, Shuichi Sakamoto, Tomoyasu Horikawa, Jiro Gyoba

    Frontiers in psychology　14　1174873-1174873　2023

    DOI： 10.3389/fpsyg.2023.1174873 　

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    Aphantasia-a condition wherein individuals have a reduced or absent construction of voluntary visual imagery-is diagnosed using either the Vividness of Visual Imagery Questionnaire (VVIQ) or self-identification. However, a significant discrepancy exists between the proportions of aphantasia in the populations assessed using these two criteria. It is unclear why the reported proportions differ excessively and what percentage of people cannot form visual imagery. We investigated the replicability of the proportion of people with aphantasia using both criteria in the same population of participants. Therefore, we explored the potential causes of the discrepancy and characteristics of putative aphantasia in terms of multisensory imagery, cognitive style, and face recognition ability. First, we conducted an online sampling study (Study 1: N = 2,871) using the VVIQ, self-identification of a reduction in visual imagery, Questionnaire upon Mental Imagery (QMI), and Verbalizer-Visualizer Questionnaire (VVQ). We found that 3.7 and 12.1% fulfilled the VVIQ and self-identification criteria, respectively, roughly replicating the proportions reported in previous studies. The self-identification criterion-but not the VVIQ criterion-contains items related to face recognition; hence, we suspected that face recognition ability was factor contributing to this discrepancy and conducted another online sampling study (Study 2: N = 774). We found a significant correlation between VVIQ and face recognition ability in the control group with self-identification, but not in the group defined by low VVIQ (VVIQ ≤32). As the participants in the control group with self-identification tended to exhibit moderately high VVIQ scores but low face recognition ability, we reason that the discrepancy can be partially explained by the contamination of individual differences in face recognition ability. Additional analyses of Study 1 revealed that the aphantasia group included participants who lacked all types of sensory imagery or only visual imagery in multisensory imagery and exhibited a non-specific cognitive style. This study indicates that the VVIQ alone may be insufficient to diagnose individuals who report an inability to form visual imagery. Furthermore, we highlight the importance of multiple assessments-along with the VVIQ-to better understand the diversity of imagery in aphantasia.

  6. Psychoacoustic study of Japanese mimetics for food textures

    Alexander Raevskiy, Shuichi Sakamoto, Nobuyuki Sakai

    Proc. 18th International Conference on Intelligent Information Hiding and Multimedia Signal Processing (IIH-MSP 2022)　(IIHMSP-2022-IS05-03)　1-10　2022/12

  7. Determination of optimal levels of whole-body vibration using audio-visual information of multimodal content Peer-reviewed

    Shota Abe, Shuichi Sakamoto, Zhengile Cui, Yôiti Suzuki

    Journal of Information Hiding and Multimedia SIgnal Processing　13　(4)　226-238　2022/12

  8. Multiple Noise Suppression in the Same Direction Using Virtual Focus and Spectral Subtraction Peer-reviewed

    Kenji Ozawa, Kanji Watanabe, Shuichi Sakamoto

    2022 IEEE 11th Global Conference on Consumer Electronics (GCCE)　2022/10/18

    Publisher: IEEE

    DOI： 10.1109/gcce56475.2022.10014337 　

  9. Spatial characteristics of auditory spatial attention in a horizontal plane Peer-reviewed

    Shuichi Sakamoto, Satoshi Tomimatsu, Tetsuaki Kawase

    Proc. The 24th International Congress on Acoustics　(ABS-0514)　1-3　2022/10

  10. Ear centering in the spatial and transform domains for near-field head-related transfer functions Invited Peer-reviewed

    César Salvador, Ayrton Urviola, Shuichi Sakamoto

    Proc. The 24th International Congress on Acoustics　(ABS-0691)　1-8　2022/10

  11. Effect of notch bandwidth simulating N1 in the human HRTF on timbre perception Invited Peer-reviewed

    Zhenglie Cui, Yôiti Suzuki, Shuichi Sakamoto, Brian C. J. Moore

    Proc. The 24th International Congress on Acoustics　(ABS-0226)　1-8　2022/10

  12. Temporal and Directional Cue Effects on the Cocktail Party Problem for Patients With Listening Difficulties Without Clinical Hearing Loss. International-journal Peer-reviewed

    Tetsuaki Kawase, Ryo Teraoka, Chie Obuchi, Shuichi Sakamoto

    Ear and hearing　2022/06/08

    DOI： 10.1097/AUD.0000000000001247 　

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    OBJECTIVES: To evaluate the listening difficulty in a cocktail party environment in the sound field in order to better demonstrate patients' difficulties listening in noise, and to examine temporal and directional cue effects on the speech intelligibility in patients with listening difficulties in noise in comparison with control subjects. DESIGN: This study examined and analyzed 16 control subjects without any complaints of listening difficulties and 16 patients who had visited the outpatient clinic of the Department of Otolaryngology-Head and Neck Surgery, Tohoku University Hospital, with complaints of listening difficulties, especially in background crowded conditions, despite having relatively good hearing on routine audiograms and speech audiometry. Using five loudspeakers located in front of the subject and at 30° and 60° to the left and right from the front, word intelligibility for the target voice (female talker) presented from one of the loudspeakers in random order with four distractor voices (male talker) was assessed under the following cue conditions: (1) "no additional temporal/directional cue (only talker sex as a cue)"; (2) "fixed temporal cue without directional cue" (white noise bursts [cue sounds] were presented from the five loudspeakers just before word presentation at 500-ms intervals); (3) "directional + variable temporal cues" [cue sounds were presented from the loudspeaker where the next target word would be presented with a variable inter-stimulus interval [ISI] of 500, 1000, 1500, or 2000 ms between the cue sound and word presentation); and (4) "directional + fixed temporal cues" (cue sounds were presented from the loudspeaker where the next target word would be presented with a fixed ISI of 500 ms). RESULTS: The results indicated the following: (1) word intelligibility under distractors was significantly deteriorated in patients with listening difficulties compared with control subjects, although the clinical speech in noise test using the headphone system did not show any significant differences between the two groups; (2) word intelligibility under distractors for patients with listening difficulties was significantly improved with directional cues presented in advance; and (3) under most cue conditions, individual differences in word intelligibility among patients with listening difficulties were significantly correlated with their dichotic listening ability, which is one of the indicators used to assess auditory selective attention ability. CONCLUSIONS: The results of this study indicate the usefulness of the presentation of directional cues for speech comprehension in the cocktail party situation in patients with listening difficulties, as well as the importance of evaluating the degree of listening difficulties spatially in the cocktail party situation.

  13. Loudness functions for patients with functional hearing loss International-journal Peer-reviewed

    Saori Shiraki, Takeshi Sato, Ryoukichi Ikeda, Jun Suzuki, Yohei Honkura, Shuichi Sakamoto, Yukio Katori, Tetsuaki Kawase

    International Journal of Audiology　61　(1)　59-65　2022/01/03

    Publisher: Informa UK Limited

    DOI： 10.1080/14992027.2021.1881627 　

    ISSN： 1499-2027

    eISSN： 1708-8186

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    OBJECTIVES: To compare the loudness functions (loudness ratings as a function of sound level) obtained from patients diagnosed as having functional hearing loss (FHL) with those for patients with sensorineural hearing loss (SNHL) and healthy volunteers. DESIGN: Loudness functions for a 1000 Hz tone for patients with FHL and SNHL were assessed based on the categorical loudness scaling method. The data were compared with control data obtained in our facilities. STUDY SAMPLE: 18 patients (33 ears) with FHL and 10 patients (19 ears) with SNHL. RESULTS: For patients with SNHL and healthy volunteers, loudness increased progressively with increasing sound level above the audiometric threshold, with no exceptions. However, for about 70% of the patients with FHL, a different type of loudness function was obtained; the thresholds determined from the loudness function, which were defined as the minimum sound levels at which loudness could be judged, were 10 dB or more lower than the audiometric threshold (>10 dB), and/or the loudness ratings were elevated for a sound at the audiometric threshold. CONCLUSIONS: The results support the hypothesis that patients with FHL often make threshold judgments based on a certain loudness.

  14. An investigation of appearance ratio and subtype of aphantasia

    Takahashi Junichi, Saito Godai, Omura Kazufumi, Yasunaga Daichi, Sugimura Shinichiro, Sakamoto Shuichi, Horikawa Tomoyasu, Gyoba Jiro

    Proceedings of the Japanese Society for Cognitive Psychology　2021　90-90　2022

    Publisher: The Japanese Society for Cognitive Psychology

    DOI： 10.14875/cogpsy.2021.0_90 　

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    We investigated the appearance ratio of aphantasia, a condition in which people with normal perception show blind imagination. The participants (N = 1018) completed the questionnaire through online sampling. We used the QMI, VVIQ, and VVQ to examine imagery vividness of multimodality, vividness of visual imagery, and cognitive style, respectively. Further, they were required to complete a free description about their episodes if they had no imagery. The number of people with no imagery was 112. Comparing the VVIQ points, we found three groups: with the lowest point (n = 2：VVIQ = 16), with lower (n = 17：16 < VVIQ < 33), and with medium degree or more (n = 93：33 < VVIQ). There were differences in the rating tendency of QMI and VVIQ subfactors among these groups. We suggest subtypes focusing on subfactors of QMI and VVIQ, to consider appearance ratio of aphantasia.

  15. Effects of visually induced self-motion on sound localization accuracy Peer-reviewed

    Akio Honda, Kei Maeda, Shuichi Sakamoto, Yôiti Suzuki

    Applied Sciences (Switzerland)　12　(1)　2022/01

    DOI： 10.3390/app12010173 　

    eISSN： 2076-3417

  16. Auditory Subjective-Straight-Ahead Blurs during Significantly Slow Passive Body Rotation Peer-reviewed

    Akio Honda, Sayaka Tsunokake, Yôiti Suzuki, Shuichi Sakamoto

    i-Perception　13　(1)　2022/01

    DOI： 10.1177/20416695211070616 　

    eISSN： 2041-6695

  17. Separation of Sound Sources in the Same Direction via Spectral Estimation with a Virtual Focus Peer-reviewed

    Kenji Ozawa, Kanji Watanabe, Shuichi Sakamoto

    2021 IEEE 10th Global Conference on Consumer Electronics (GCCE)　2021/10/12

    Publisher: IEEE

    DOI： 10.1109/gcce53005.2021.9621869 　

  18. Directional Early-to-Late Energy Ratios to Quantify Clarity: A Case Study in a Large Auditorium Peer-reviewed

    Alexis Campos, Shuichi Sakamoto, Cesar D. Salvador

    2021 Immersive and 3D Audio: from Architecture to Automotive (I3DA)　2021/09/08

    Publisher: IEEE

    DOI： 10.1109/i3da48870.2021.9610935 　

  19. Ear Centering for Near-Distance Head-Related Transfer Functions Peer-reviewed

    Ayrton Urviola, Shuichi Sakamoto, Cesar D. Salvador

    2021 Immersive and 3D Audio: from Architecture to Automotive (I3DA)　2021/09/08

    Publisher: IEEE

    DOI： 10.1109/i3da48870.2021.9610891 　

  20. Objective evaluation of diffuseness in multichannel audio reproduction Peer-reviewed

    Akio Ando, Takayuki Torikai, Yusuke Yanagida, Shuichi Sakamoto

    Proc. the 27th International Congress on Sound and Vibration (ICSV27)　1-8　2021/07

  21. 音から生成した全身振動の周波数特性が高次感性に与える影響 ～多感覚情報の高次感性を定める要因の解明を目指して～ Peer-reviewed

    阿部翔太, 山高正烈, 坂本修一, 鈴木陽一, 行場次朗

    日本バーチャルリアリティ学会論文誌　26　(1)　62-71　2021/03

  22. Effects of listening task characteristics on auditory spatial attention in multi-source environment Peer-reviewed

    Ryo Teraoka, Shuichi Sakamoto, Zhenglie Cui, Yôiti Suzuki, Satoshi Shioiri

    Acoustical Science and Technology　42　(1)　12-21　2021/01/01

    DOI： 10.1250/ast.42.12 　

    ISSN： 1346-3969

    eISSN： 1347-5177

  23. Separation of Multiple Sound Sources in the Same Direction by Instantaneous Spectral Estimation Peer-reviewed

    Kenji Ozawa, Kanji Watanabe, Shuichi Sakamoto

    2020 IEEE 9th Global Conference on Consumer Electronics (GCCE)　2020/10/13

    Publisher: IEEE

    DOI： 10.1109/gcce50665.2020.9291767 　

  24. Noise reduction using a plane microphone-array and a spatio-temporal sound pressure distribution image Peer-reviewed

    Kenji Ozawa, Koichiro Shiozawa, Masanori Morise, Shuichi Sakamoto

    Proc. 2020 IEEE International Conference on Consumer Electronics (ICCE-TW)　D5-2　1-2　2020/09

  25. Optimization of output level of outdoor loudspeakers for municipal radio systems in times of disaster Peer-reviewed

    西村竜一, 坂本修一, 苣木禎史, CUI Zhenglie

    日本音響学会誌　76　(9)　475-484　2020/09

    ISSN： 0369-4232

  26. In-home auditory training using audiovisual stimuli on a tablet computer: Feasibility and preliminary results International-journal Peer-reviewed

    Takeshi Sato, Tomoko Yabushita, Shuichi Sakamoto, Yukio Katori, Tetsuaki Kawase

    Auris Nasus Larynx　47　(3)　348-352　2020/06

    Publisher: Elsevier BV

    DOI： 10.1016/j.anl.2019.09.006 　

    ISSN： 0385-8146

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    OBJECTIVE: To examine the feasibility and possible effects of in-home auditory training using audiovisual speech stimuli on a tablet computer for patients with hearing loss using a hearing aid (HA) or a cochlear implant (CI). METHODS: In total, 11 patients with hearing loss (mean age, 60.2 ± 13.7 years) who had been using an HA or CI for more than 1 year were examined. As auditory training, the participants listened repeatedly to audiovisual speech stimuli on a tablet computer for 3 months. Speech intelligibility for trained words, untrained words, and monosyllables presented at a sound pressure level of 70 dB were assessed before and at 1, 2, and 3 months after training. RESULTS: Eight out the 11 patients completed 3 months of in-home auditory training. Three of these patients withdrew from the training before completing the protocol, mainly because of "boredom from recurring simple tasks". Significant improvements in speech intelligibility were found for the trained and untrained words after the 3-month training period (p < 0.05), but no significant differences were found for monosyllables. CONCLUSION: In-home auditory training using a tablet computer could help improve auditory quality of life in patients with hearing loss using an HA or CI. But the further comparative studies using other existing method will be necessary to establish the practical importance of the present method.

  27. Comparing training effects associated with two sets of HRTF data on auditory localization performance Peer-reviewed

    Sungyoung Kim, Song Hui Chon, Hiraku Okumura, Shuichi Sakamoto

    Proc. AES 148th Convention　1-6　2020/05

  28. Spherical harmonic representation of rectangular domain sound fields Peer-reviewed

    Junjie Shi, César D. Salvador, Jorge Treviño, Shuichi Sakamoto, Yôiti Suzuki

    Acoustical Science and Technology　41　(1)　451-453　2020/01/01

    Publisher: Acoustical Society of Japan

    DOI： 10.1250/ast.41.451 　

    ISSN： 1346-3969

    eISSN： 1347-5177

  29. Accuracy of subjective straight ahead after passive rotation of listeners: Effects of time interval between visual cue and onset of sound stimulus Peer-reviewed

    Kei Maeda, Akio Honda, Shuichi Sakamoto, Yôiti Suzuki

    Acoustical Science and Technology　41　(1)　425-427　2020/01/01

    Publisher: Acoustical Society of Japan

    DOI： 10.1250/ast.41.425 　

    ISSN： 1346-3969

    eISSN： 1347-5177

  30. Revisiting the theory of auditory displays based on the virtual sphere model Invited Peer-reviewed

    Jorge Treviño, Shuichi Sakamoto, Yôiti Suzuki

    Acoustical Science and Technology　41　(1)　276-281　2020/01/01

    Publisher: Acoustical Society of Japan

    DOI： 10.1250/ast.41.276 　

    ISSN： 1346-3969

    eISSN： 1347-5177

  31. Effect of passive whole-body rotation on sound localization accuracy of listener subjective straight ahead Invited Peer-reviewed

    Akio Honda, Yoji Masumi, Yôiti Suzuki, Shuichi Sakamoto

    Acoustical Science and Technology　41　(1)　249-252　2020/01/01

    DOI： 10.1250/ast.41.249 　

    ISSN： 1346-3969

    eISSN： 1347-5177

  32. Temporal characteristics of auditory spatial attention on word intelligibility Peer-reviewed

    Ryo Teraoka, Shuichi Sakamoto, Zhenglie Cui, Yôiti Suzuki, Satoshi Shioiri

    Acoustical Science and Technology　41　(1)　394-395　2020/01/01

    Publisher: Acoustical Society of Japan

    DOI： 10.1250/ast.41.394 　

    ISSN： 1346-3969

    eISSN： 1347-5177

  33. Sound Source Separation by Spectral Subtraction Based on Instantaneous Estimation of Noise Spectrum Peer-reviewed

    Kenji Ozawa, Masanori Morise, Shuichi Sakamoto, Kanji Watanabe

    2019 6th International Conference on Systems and Informatics (ICSAI)　885-890　2019/11

    Publisher: IEEE

    DOI： 10.1109/icsai48974.2019.9010477 　

  34. Investigating room-induced influences on immersive experience, Part II: effects associated with listener groups and musical excerpts Peer-reviewed

    Sungyoung Kim, Shuichi Sakamoto

    Proc. AES 147th Convention　1-12　2019/10

  35. Suppression of two noise sources in the same direction by instantaneous spectral subtraction Peer-reviewed

    Kenji Ozawa, Kanji Watanabe, Shuichi Sakamoto

    Proc. 2019 IEEE 8th Global Conference on Consumer Electronics (GCCE2019)　771-772　2019/10

  36. Directional selectivity of auditory attentional spotlight in complex listening environment Peer-reviewed

    Ryo Teraoka, Shuichi Sakamoto, Zhenglie Cui, Yo-ti Suzuki, Satoshi Shioiri

    Proc. The 23rd International Congress on Acoustics　5764-5770　2019/09

  37. Influence of full-body vibration adapted to the foreground components on the high-level perception of reality Peer-reviewed

    Shota Abe, Zhenglie Cui, Shuichi Sakamoto, Yo-iti Suzuki, Jiro Gyoba

    Proc. The 23rd International Congress on Acoustics　5869-5876　2019/09

  38. Effects of target speech distance on auditory spatial attention under noisy environment Peer-reviewed

    Shuichi Sakamoto, Florent Monasterolo, Cesar Salvador, Zhenglie Cui, Yo-iti Suzuki

    Proc. The 23rd International Congress on Acoustics　2177-2181　2019/09

  39. Binaural synthesis using spherical microphone array based on the solution to an inverse problem Invited Peer-reviewed

    Shuichi Sakamoto, Cesar Salvador, Jorge Trevino, Yo-iti Suzuki

    Proc. inter-noise2019　TC11.05-1925　1-6　2019/06

  40. Evaluation of the extension and coloration of multiple listening zones synthesized by the shared field reproduction system Peer-reviewed

    Taku Shimizu, Jorge Trevino, Shuichi Sakamoto, Yo-iti Suzuki, Tomohiko Ise

    Acoustical Science and Technology　40　(4)　2019

  41. Modeling head-related transfer functions with spherical wavelets Peer-reviewed

    Shichao Hu, Cesar Salvador, Jorge Trevino, Shuichi Sakamoto, Yo-iti Suzuki

    Applied Acoustics　146　81-88　2019

    DOI： 10.1016/j.apacoust.2018.10.026 　

  42. Effects of inter-word pauses on speech intelligibility under long-path echo conditions Peer-reviewed

    Shuichi Sakamoto, Zhenglie Cui, Tomori Miyashita, Masayuki Morimoto, Yôiti Suzuki, Hayato Sato

    Applied Acoustics　140　263-274　2018/11/01

    Publisher: Elsevier Ltd

    DOI： 10.1016/j.apacoust.2018.01.020 　

    ISSN： 1872-910X 0003-682X

  43. Sound source separation by instantaneous-estimation-based spectral subtraction Peer-reviewed

    Kenji Ozawa, Masanori Morise, Shuichi Sakamoto

    Proc. 5th International Conference on Systems and Informatics (ICSAI2018)　870-875　2018/11

  44. Separation of two sound sources in the same direction by image signal processing Peer-reviewed

    Kenji Ozawa, Yuta Koshimizu, Masanori Morise, Shuichi Sakamoto

    Proc. 2018 IEEE 7th Global Conference on Consumer Electronics (GCCE2018)　479-480　2018/10

  45. Influence of auditory selective attention on word intelligibility Peer-reviewed

    Ryo Teraoka, Shuichi Sakamoto, Zhenglie Cui, Yo-iti Suzuki, Satoshi Shioiri

    Proc. 65th Open Seminar on Acoustics　307-310　2018/09

  46. Dataset of near-distance head-related transfer functions calculated using the boundary element method Peer-reviewed

    Cesar Salvador, Shuichi Sakamoto, Jorge Trevino, Yo-iti Suzuki

    Proc. 2018 AES International Conference on Spatial Reproduction　38　1-9　2018/08

  47. Extending the listening region of high-order Ambisonics through series acceleration Peer-reviewed

    Jorge Trevino, Shuichi Sakamoto, Yo-iti Suzuki

    Proc. 2018 AES International Conference on Spatial Reproduction　43　1-7　2018/08

  48. Proposal of a sound source separation method using image signal processing of a spatio-temporal sound pressure distribution image Peer-reviewed

    Kenji Ozawa, Masaaki Ito, Genya Shimizu, Masanori Morise, Shuichi Sakamoto

    Proc. 2018 AES International Conference on Spatial Reproduction　44　1-7　2018/08

  49. Recognition of an auditory environment: investigating room-induced influences on immersive experience Peer-reviewed

    Sungyoung Kim, Richard King, Toru Kamekawa, Shuichi Sakamoto

    Proc. 2018 AES International Conference on Spatial Reproduction　49　1-9　2018/08

  50. Effects of inter-word pause and speech rate on word intelligibility in a long-path echo environment: For improvement of outdoor mass notification sound systems Invited Peer-reviewed

    Zhenglie Cui, Minori Suzuki, Shuichi Sakamoto, Yo-iti Suzuki

    Proc. the 25th International Congress on Sound and Vibration (ICSV25)　1-7　2018/07

  51. Design of stochastic asymmetric compensation filters for auditory signal processing Peer-reviewed

    Naoya Onizawa, Shunsuke Koshita, Shuichi Sakamoto, Masayuki Kawamata, Takahiro Hanyu

    2017 IEEE Global Conference on Signal and Information Processing, GlobalSIP 2017 - Proceedings　2018-　1315-1319　2018/03/07

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI： 10.1109/GlobalSIP.2017.8309174 　

  52. Detection threshold of auditory apparent motion during linearly self-motion Peer-reviewed

    Miharu Noda, Shuichi Sakamoto, Zhenglie Cui, Wataru Teramoto, Yôiti Suzuki, Jiro Gyoba

    Proc. 2018 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'18)　17-20　2018/03

  53. Performance evaluation of an infrasound observation device using MEMS atomospheric pressure sensor Peer-reviewed

    Yuji Saito, Ryouichi Nishimura, Shuichi Sakamoto, Yôiti Suzuki

    Proc. 2018 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'18)　411-414　2018/03

  54. Boundary Matching Filters for Spherical Microphone and Loudspeaker Arrays Peer-reviewed

    César D. Salvador, Shuichi Sakamoto, Jorge Treviño, Yôiti Suzuki

    IEEE/ACM Transactions on Audio Speech and Language Processing　26　(3)　461-474　2018/03/01

    Publisher: Institute of Electrical and Electronics Engineers Inc.

    DOI： 10.1109/TASLP.2017.2778562 　

    ISSN： 2329-9290

  55. Enhancing binaural reconstruction from rigid circular microphone array recordings by using virtual microphones

    César D. Salvador, Shuichi Sakamoto, Jorge Treviño, Yôiti Suzuki

    Proceedings of the AES International Conference　2018-　194-202　2018

    Publisher: Audio Engineering Society

  56. A wind noise detection algorithm for monitoring infrasound using smartphone as a sensor device Peer-reviewed

    Ryouichi Nishimura, Shuichi Sakamoto, Yôiti Suzuki

    Smart Innovation, Systems and Technologies　82　145-152　2018

    Publisher: Springer Science and Business Media Deutschland GmbH

    DOI： 10.1007/978-3-319-63859-1_19 　

    ISSN： 2190-3026 2190-3018

  57. How can body vibration generated from audio signal in AV content enhance perceived reality? Peer-reviewed

    Zhenglie Cui, Hiroyuki Yagyu, Shuichi Sakamoto, Yo-iti Suzuki, Jiro Gyoba

    Journal of Information Processing (J)　59　(11)　1986-1994　2018

  58. An Area/Power-Aware 32-channel compressive gammachirp filterbank chip based on hybrid stochastic/binary computation Peer-reviewed

    Naoya Onizawa, Shunsuke Koshita, Shuichi Sakamoto, Masayuki Kawamata, Takahiro Hanyu

    Nonlinear Theory and Its Applications, IEICE　E9-N　(4)　406-422　2018

    DOI： 10.1587/nolta.9.423 　

  59. Effects of listener's whole-body rotation and sound duration on horizontal sound localization Peer-reviewed

    Akio Honda, Sayaka Tsunokake, Shuichi Sakamoto, Yo-iti Suzuki

    Acoustical Science and Technology　39　(4)　305-307　2018

    DOI： 10.1250/ast.39.305 　

    ISSN： 1346-3969

    eISSN： 1347-5177

  60. Extended sound field recording using position information of directional sound sources Peer-reviewed

    Keigo Wakayama, Jorge Trevino, Hideaki Takada, Shuichi Sakamoto, Yoiti Suzuki

    2017 IEEE WORKSHOP ON APPLICATIONS OF SIGNAL PROCESSING TO AUDIO AND ACOUSTICS (WASPAA)　185-189　2017/11

    DOI： 10.1109/WASPAA.2017.8170020 　

    ISSN： 1931-1168

  61. Area/Energy-Efficient Gammatone Filters Based on Stochastic Computation Peer-reviewed

    Naoya Onizawa, Shunsuke Koshita, Shuichi Sakamoto, Masahide Abe, Masayuki Kawamata, Takahiro Hanyu

    IEEE TRANSACTIONS ON VERY LARGE SCALE INTEGRATION (VLSI) SYSTEMS　25　(10)　2724-2735　2017/10

    DOI： 10.1109/TVLSI.2017.2687404 　

    ISSN： 1063-8210

    eISSN： 1557-9999

  62. Accuracy/Energy-Flexible Stochastic Configurable 2D Gabor Filter with Instant-on Capability Peer-reviewed

    N. Onizawa, S. Koshita, S. Sakamoto, M. Kawamata, T. Hanyu

    43rd European Solid-State Circuit Conference (ESSCIRC)　43-46　2017/09

    DOI： 10.1109/ESSCIRC.2017.8094521 　

  63. Effect of word familiarity on word intelligibility of four continuous words under long-path echo conditions Peer-reviewed

    Zhenglie Cui, Shuichi Sakamoto, Masayuki Morimoto, Yoiti Suzuki, Hayato Sato

    APPLIED ACOUSTICS　124　30-37　2017/09

    DOI： 10.1016/j.apacoust.2017.02.001 　

    ISSN： 0003-682X

    eISSN： 1872-910X

  64. Effect of full-body vibration generated from audio signal on perceived reality Invited Peer-reviewed

    Zhenglie Cui, Hiroyuki Yagyu, Shuichi Sakamoto, Yôiti Suzuki, Jiro Gyoba

    Proc. internoise2017　3003-3010　2017/08

  65. A wind noise detection algorithm for monitoring infrasound using smartphone as a sensor device Invited Peer-reviewed

    Ryouichi Nishimura, Shuichi Sakamoto, Yôiti Suzuki

    Proc. 13th International Conference on Intelligent Information Hiding and Multimedia Signal Processing (IIH-MSP 2017)　IIHMSP-2017-IS15-04　1-8　2017/08

  66. Binaural rendering of spherical microphone array recordings by directly synthesizing the HRTF spatial pattern Invited Peer-reviewed

    Shuichi Sakamoto, Cesar Salvador, Jorge Trevino, Yôiti Suzuki

    Proc. the 24th International Congress on Sound and Vibration (ICSV24)　1-8　2017/07

  67. Multi-zone reproduction of a shared sound field including distance effects Peer-reviewed

    Taku Shimizu, Jorge Trevino, Shuichi Sakamoto, Yôiti Suzuki, Tomohiko Ise

    Proc. the 24th International Congress on Sound and Vibration (ICSV24)　1-8　2017/07

  68. Evaluation of Stochastic Cascaded IIR Filters Peer-reviewed

    Naoya Onizawa, Shunsuke Koshita, Shuichi Sakamoto, Masayuki Kawamata, Takahiro Hanyu

    Proceedings of The International Symposium on Multiple-Valued Logic　224-229　2017/06/30

    Publisher: IEEE Computer Society

    DOI： 10.1109/ISMVL.2017.25 　

    ISSN： 0195-623X

  69. A Compression Method for Spherical Microphone Array Recordings using Principal Component Analysis Peer-reviewed

    Hironori Sato, Arif Wicaksono, Shuichi Sakamoto, Cesar Salvador, Jorge Trevino, Yôiti Suzuki, Akinori Ito

    Proc. 2017 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'17)　2PM1-3-4　433-436　2017/02

  70. Effects of auditory spatial attention on word intelligibility accuracy Peer-reviewed

    Ryo Teraoka, Shuichi Sakamoto, Zhenglie Cui, Yôiti Suzuki

    Proc. 2017 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'17)　2PM2-3-3　485-488　2017/02

  71. 観測者が期待する振動の提示がマルチモーダルコンテンツの高次感性に及ぼす影響

    阿部 翔太, 崔 正烈, 坂本 修一, 鈴木 陽一, 行場 次朗

    電気関係学会東北支部連合大会講演論文集　2017　71-71　2017

    Publisher: 電気関係学会東北支部連合大会実行委員会

    DOI： 10.11528/tsjc.2017.0_71 　

  72. Influence of visual depth and vibration on the high-level perception of reality in 3D contents Peer-reviewed

    Zhenglie Cui, Shuichi Sakamoto, Jiro Gyoba, Yôiti Suzuki

    Journal of Information Hiding and Multimedia Signal Processing　8　(6)　1382-1391　2017

  73. Method for updating microphone configuration in audio super-resolution Peer-reviewed

    Ryouichi Nishimura, Shuichi Sakamoto, Yoshifumi Chisaki, Zhenglie Cui

    Journal of Information Hiding and Multimedia Signal Processing　8　(6)　1352-1361　2017

  74. Enhancement of spatial sound recordings by adding virtual microphones to spherical microphone arrays Peer-reviewed

    Cesar Salvador, Shuichi Sakamoto, Jorge Trevino, Yôiti Suzuki

    Journal of Information Hiding and Multimedia Signal Processing　8　(6)　1392-1404　2017

  75. Temporal characteristics of perceived reality of multimodal contents Invited Peer-reviewed

    Shuichi Sakamoto, Hiroyuki Yagyu, Zhenglie Cui, Tomoko Ohtani, Yoiti Suzuki, Jiro Gyoba

    ADVANCES IN INTELLIGENT INFORMATION HIDING AND MULTIMEDIA SIGNAL PROCESSING, VOL 1　63　199-206　2017

    DOI： 10.1007/978-3-319-50209-0_25 　

    ISSN： 2190-3018

  76. Spatial accuracy of binaural synthesis from rigid spherical microphone array recordings Peer-reviewed

    César D. Salvador, Shuichi Sakamoto, Jorge Treviñoz, Yôiti Suzukix

    Acoustical Science and Technology　38　(1)　23-30　2017

    Publisher: Acoustical Society of Japan

    DOI： 10.1250/ast.38.23 　

    ISSN： 1347-5177 1346-3969

  77. Distance-varying filters to synthesize head-related transfer functions in the horizontal plane from circular boundary values Peer-reviewed

    César D. Salvador, Shuichi Sakamoto, Jorge Trevinõz, Yôiti Suzukix

    Acoustical Science and Technology　38　(1)　1-13　2017

    Publisher: Acoustical Society of Japan

    DOI： 10.1250/ast.38.1 　

    ISSN： 1347-5177 1346-3969

  78. Effects of Visual Speech on Early Auditory Evoked Fields - From the Viewpoint of Individual Variance Peer-reviewed

    Izumi Yahata, Tetsuaki Kawase, Akitake Kanno, Hiroshi Hidaka, Shuichi Sakamoto, Nobukazu Nakasato, Ryuta Kawashima, Yukio Katori

    PLOS ONE　12　(1)　e0170166　2017/01

    DOI： 10.1371/journal.pone.0170166 　

    ISSN： 1932-6203

  79. Design theory for binaural synthesis: Combining microphone array recordings and head-related transfer function datasets Invited Peer-reviewed

    César D. Salvador, Shuichi Sakamoto, Jorge Treviño, Yôiti Suzuki

    Acoustical Science and Technology　38　(2)　51-62　2017

    Publisher: Acoustical Society of Japan

    DOI： 10.1250/ast.38.51 　

    ISSN： 1347-5177 1346-3969

  80. Impact of Audio-Visual Asynchrony on Lip-Reading Effects -Neuromagnetic and Psychophysical Study- Peer-reviewed

    Tetsuaki Kawase, Izumi Yahata, Akitake Kanno, Shuichi Sakamoto, Yoshitaka Takanashi, Shiho Takata, Nobukazu Nakasato, Ryuta Kawashima, Yukio Katori

    PLOS ONE　11　(12)　e0168740　2016/12

    DOI： 10.1371/journal.pone.0168740 　

    ISSN： 1932-6203

  81. A local representation of the head-related transfer function Peer-reviewed

    Shichao Hu, Jorge Trevino, Cesar Salvador, Shuichi Sakamoto, Junfeng Li, Yoiti Suzuki

    JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA　140　(3)　EL285-EL290　2016/09

    DOI： 10.1121/1.4962805 　

    ISSN： 0001-4966

    eISSN： 1520-8524

  82. Performance analysis of a compact spherical microphone array on sound-space sensing for binaural presentation Invited Peer-reviewed

    Shuichi Sakamoto, Yôiti Suzuki

    Proc. The 22nd International Congress on Acoustics　ICA2016-253　1-8　2016/09

  83. Multi-zone sound field reproduction method including distance effects Peer-reviewed

    Taku Shimizu, Jorge Trevino, Shuichi Sakamoto, Yôiti Suzuki, Tomohiko Ise

    Proc. The 22nd International Congress on Acoustics　ICA2016-425　1-8　2016/09

  84. Sound source separation in complex environments using an array-of-arrays microphone system Peer-reviewed

    Jorge Trevino, Cesar Salvador, Virgilijus Braciulis, Shuichi Sakamoto, Yôiti Suzuki, Kyoji Yoshikawa, Takashi Yamasaki, Kenichi Kidokoro

    Proc. The 22nd International Congress on Acoustics　ICA2016-415　1-10　2016/09

  85. Effects of vibration information on the sense of presence and verisimilitude of audio-visual scenes Invited Peer-reviewed

    Shuichi Sakamoto, Zhenglie Cui, Tomoko Ohtani, Yôiti Suzuki, Jiro Gyoba

    Proc. internoise2016　Mon:18-2-5,　1777-1782　2016/08

  86. Construction of two anechoic rooms with a new experimental floor structure Peer-reviewed

    Shuichi Sakamoto, Zhenglie Cui, Tomoko Ohtani, Yôiti Suzuki, Jiro Gyoba

    Proc. internoise2016　Wed:07-5-8　6272-6280　2016/08

  87. Numerical evaluation of binaural synthesis from rigid spherical microphone array recordings Peer-reviewed

    Cesar Salvador, Shuichi Sakamoto, Jorge Trevino, Yôiti Suzuki

    Proc. 2016 AES International Conference on Headphone Technology　3-1　1-8　2016/08

  88. Presenting spatial sound to moving listeners using high-order Ambisonics Peer-reviewed

    Jorge Trevino, Shuichi Sakamoto, Yo-iti Suzuki

    Proc. 2016 AES International Conference on Sound Field Control　2-2　1-7　2016/07

  89. Recording of extended sound fields using spherical microphone arrays and a-priori knowledge of the sound source positions International-journal Peer-reviewed

    Jorge Trevino, Keigo Wakayama, Shuichi Sakamoto, Yo-iti Suzuki, Hideaki Takada, Manabu Okamoto

    The Journal of the Acoustical Society of America　139　2108　2016/04

    DOI： 10.1121/1.4950265 　

  90. Evaluation of robustness of 3D sound space acquisition system, SENZI, using spherical microphone arrray Peer-reviewed

    Yuuto Wada, Shuichi Sakamoto, Yo-iti Suzuki

    Proc. 2016 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'16)　7PM2-4-1　233-236　2016/03

  91. Compression of spherical microphone array recordings using eigenvalue decomposition Peer-reviewed

    Hironori Sato, Arif Wicaksono, Shuichi Sakamoto, Cesar Salvador, Jorge Trevino, Yo-iti Suzuki

    Proc. 2016 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'16)　7PM2-4-3　241-244　2016/03

  92. Gammatone Filter Based on Stochastic Computation Peer-reviewed

    Naoya Onizawa, Shunsuke Koshita, Shuichi Sakamoto, Masahide Abe, Masayuki Kawamata, Takahiro Hanyu

    2016 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING PROCEEDINGS　1036-1040　2016/03

    DOI： 10.1109/ICASSP.2016.7471833 　

    ISSN： 1520-6149

  93. Presenting spa

    Jorge Trevino, Shuichi Sakamoto, Yôiti Suzuki

    Proceedings of the AES International Conference　2016-　2016

    Publisher: Audio Engineering Society

  94. ピッチ平均・話速変化音声聴取時に誘起される面白さの検討

    齋藤 雄二, 坂本 修一, 鈴木 陽一

    電気関係学会東北支部連合大会講演論文集　2016　151-151　2016

    Publisher: 電気関係学会東北支部連合大会実行委員会

    DOI： 10.11528/tsjc.2016.0_151 　

  95. Enhancing Stereo Signals with High-Order Ambisonics Spatial Information Invited Peer-reviewed

    Jorge Trevino, Shuichi Sakamoto, Junfeng Li, Yoiti Suzuki

    IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS　E99D　(1)　41-49　2016/01

    DOI： 10.1587/transinf.2015MUI0001 　

    ISSN： 1745-1361

  96. Multi-zone sound field reproduction algorithm based on spatial harmonics analysis Peer-reviewed

    Taku Shimizu, Jorge Trevino, Shuichi Sakamoto, Yo-iti Suzuki

    Proc. 2015 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'15)　28AM2-1-1　70-73　2015/02

  97. A multi-zone approach to sound field reproduction based on spherical harmonic analysis Peer-reviewed

    Taku Shimizu, Jorge Trevinoy, Shuichi Sakamoto, Yôiti Suzukix

    Acoustical Science and Technology　36　(5)　441-444　2015

    Publisher: Acoustical Society of Japan

    DOI： 10.1250/ast.36.441 　

    ISSN： 1347-5177 1346-3969

  98. Senses of presence and verisimilitude of audio-visual contents: Effects of sounds and playback speeds on sports video Peer-reviewed

    Akio Honda, Takayuki Kanda, Hiroshi Shibata, Shuichi Sakamoto, Yukio Iwaya, Jiro Gyoba, Yo-iti Suzuki

    Interdisciplinary Information Sciences Journal　21　(2)　143-149　2015

    Publisher: Tohoku University

    DOI： 10.4036/iis.2015.A.05 　

    ISSN： 1340-9050

    More details Close

    Multimedia users all over the world hope to experience more natural and realistic audio–visual contents such as landscapes, music, and sports. This study investigated whether sounds and playback speeds of sports video (a golf swing scene) were able to modify viewers' perceived sense of presence and verisimilitude. Previous studies revealed different characteristics between the sense of presence and verisimilitude during perception of audio–visual contents. For this study, we recorded a video of the golf swing scene with a high-speed camera and manipulated the playback speeds and impact sound of the video for use as experimental stimuli. Results showed that the sense of presence was increased when the scene was presented at normal playback speed with or without sound conditions. In contrast, verisimilitude showed different patterns with respect to the playback speeds between these sound conditions. Our findings indicate that viewers' sense of presence and verisimilitude have different sensitivity to the contingent sounds and different temporal characteristics.

  99. Effect of active self-motion on auditory space perception Peer-reviewed

    Shuichi Sakamoto, Wataru Teramoto, Hideaki Terashima, Jiro Gyoba

    Interdisciplinary Information Sciences Journal　21　(2)　167-172　2015

    Publisher: Tohoku University

    DOI： 10.4036/iis.2015.A.08 　

    ISSN： 1340-9050

    More details Close

    This study investigated how auditory space is represented during linear self-motion. Results of several studies suggest that whether the listener's motion is active or passive affects sound localization. Therefore, we investigated whether the style of the self-motion affects the perceived auditory space. As the passive condition, observers were transported automatically forward by a robotic wheelchair. In contrast, observers controlled the movement of the robotic wheelchair or walked straight ahead in active conditions. The observers indicated the direction in which the sound was perceived relative to their coronal plane (i.e., a two-alternative forced-choice task). The results of experiments demonstrated that the sound position aligned with the subjective coronal plane was displaced backward relative to the observers' physical coronal plane both in active and passive motion conditions. These results suggest that perceived self-motion itself affects auditory space representation irrespective of the intention of the movement.

  100. Effects of multimodal contents on temporal shifts in reality perception Peer-reviewed

    柳生寛幸, 崔正烈, 坂本修一, 大谷智子, 鈴木陽一, 行場次朗

    日本バーチャルリアリティ学会論文誌　20　(3)　199-208　2015

    Publisher: THE VIRTUAL REALITY SOCIETY OF JAPAN

    DOI： 10.18974/tvrsj.20.3_199 　

    ISSN： 1344-011X

    More details Close

    Understanding the mechanism of virtual reality perception is crucial for the development of high-definition communication systems in multimedia contents. Recent results show that the perception of reality can be enhanced by not only audio-visual contents but adding full-body vibratory information. However, the effects of stimulus onset asynchrony (SOA) on reality perception have not been clearly understood. In this study, we investigated the effects of audio-visual SOA and visual-vibratory SOA on the intensity of reality perception. Results indicated that reality perception was more sensitive to audio-visual SOA than to visual-vibratory SOA.

  101. Sound-space recording and binaural presentation system based on a 252-channel microphone array Peer-reviewed

    Shuichi Sakamoto, Satoshi Hongo, Takuma Okamoto, Yukio Iwaya, Yôiti Suzuki

    Acoustical Science and Technology　36　(6)　516-526　2015

    Publisher: Acoustical Society of Japan

    DOI： 10.1250/ast.36.516 　

    ISSN： 1347-5177 1346-3969

  102. Prediction method for compression of spherical microphone array signals using geometric information (Invited Paper) Invited Peer-reviewed

    Shuichi Sakamoto, Arif Wicaksono, Jorge Trevino, Cesar Salvador, Yoiti Suzuki

    2015 INTERNATIONAL CONFERENCE ON INTELLIGENT INFORMATION HIDING AND MULTIMEDIA SIGNAL PROCESSING (IIH-MSP)　IIHMSP-2015-IS22-03　376-379　2015

    DOI： 10.1109/IIH-MSP.2015.91 　

  103. A compact representation of the head-related transfer function inspired by the wavelet transform on the sphere Invited Peer-reviewed

    Jorge Trevino, Shichao Hu, Cesar Salvador, Shuichi Sakamoto, Junfeng Li, Yoiti Suzuki

    2015 INTERNATIONAL CONFERENCE ON INTELLIGENT INFORMATION HIDING AND MULTIMEDIA SIGNAL PROCESSING (IIH-MSP)　IIHMSP-2015-IS22-02　372-375　2015

    DOI： 10.1109/IIH-MSP.2015.108 　

  104. Auditory space perception during linearly self-motion Invited Peer-reviewed

    Shuichi Sakamoto, Wataru Teramoto, Jiro Gyoba

    Proc. 7th Forum Acusticum 2014 (FA2014)　1-6　2014/09

  105. 3D Sound-Space Sensing Method Based on Numerous Symmetrically Arranged Microphones Peer-reviewed

    Shuichi Sakamoto, Satoshi Hongo, Yoiti Suzuki

    IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES　E97A　(9)　1893-1901　2014/09

    DOI： 10.1587/transfun.E97.A.1893 　

    ISSN： 1745-1337

  106. Distortion of auditory space during visually induced self-motion in depth Peer-reviewed

    Wataru Teramoto, Zhenglie Cui, Shuichi Sakamoto, Jiro Gyoba

    FRONTIERS IN PSYCHOLOGY　5　(848)　2014/08

    DOI： 10.3389/fpsyg.2014.00848 　

    ISSN： 1664-1078

  107. The contribution of the detailed parts around talker's mouth for speech intelligibility Invited Peer-reviewed

    Shuichi Sakamoto, Gen Hasegawa, Toru Abe, Tomoko Ohtani, Yo-iti Suzuki, Tetsuaki Kawase

    Proc. the 21st International Congress on Sound and Vibration (ICSV21)　1-7　2014/07

  108. Embedding distance information in binaural renderings of far field recordings Peer-reviewed

    Cesar Salvador, Shuichi Sakamoto, Jorge Trevino, Yo-iti Suzuki

    Proc. EAA Joint Symposium on Auralization and Ambisonics 2014　1-7　2014/04

  109. HRTFs representation based on weighting coefficients calculated by SENZI system Peer-reviewed

    Yoshiki Satou, Shuichi Sakamoto, Yo-iti Suzuki

    Proc. 2014 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'14)　1AM1-2-3　29-32　2014/02/28

  110. Listener's subjective front in horizontal sound localization: Effects of head movements and face directions Peer-reviewed

    Yoji Masumi, Yo-iti Suzuki, Akio Honda, Shuichi Sakamoto

    Proc. 2014 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP'14)　1AM1-2-4　33-36　2014/02/28

  111. 受動回転時の最小弁別角度に回転速度が及ぼす影響

    本多 明生, 鈴木 陽一, 坂本 修一

    日本音響学会講演論文集　-　815-816　2014

  112. On the Performance and Robustness of Crosstalk Cancelation with Multiple Loudspeakers Peer-reviewed

    Xing Yang, Risheng Xia, Zhonghua Fu, Junfeng Li, Yonghong Yan, Shuichi Sakamoto, Yoiti Suzuki

    2014 TENTH INTERNATIONAL CONFERENCE ON INTELLIGENT INFORMATION HIDING AND MULTIMEDIA SIGNAL PROCESSING (IIH-MSP 2014)　IIHMSP-2014-IS23-06　618-621　2014

    DOI： 10.1109/IIH-MSP.2014.160 　

  113. The effect of rotationally moving sound on the circular vection Peer-reviewed

    崔正烈, 柳生寛幸, 坂本修一, 岩谷幸雄, 鈴木陽一

    電子情報通信学会論文誌　J97-D　(4)　891-894　2014

  114. Body vibration effects on perceived reality with multi-modal contents Peer-reviewed

    Shuichi Sakamoto, Gen Hasegawa, Akio Honda, Yukio Iwaya, Yôiti Suzuki, Jiro Gyoba

    ITE Transactions on Media Technology and Applications　2　(1)　46-50　2014

    Publisher: Institute of Image Information and Television Engineers

    DOI： 10.3169/mta.2.46 　

    ISSN： 2186-7364

    eISSN： 2186-7364

  115. Mixed-order Ambisonics encoding of cylindrical microphone array signals Peer-reviewed

    Jorge Trevino, Shoichi Koyama, Shuichi Sakamoto, Yôiti Suzuki

    Acoustical Science and Technology　35　(3)　174-177　2014

    Publisher: Acoustical Society of Japan

    DOI： 10.1250/ast.35.174 　

    ISSN： 1347-5177 1346-3969

  116. Design of a Tsunami warning sound robust for long-distance propagation Peer-reviewed

    崔正烈, 増見洋治, 岩谷幸雄, 勝本道哲, 坂本修一, 鈴木陽一

    日本感性工学会論文誌　13　(3)　459-469　2014

    DOI： 10.5057/jjske.13.459 　

  117. Representation of individual HRTFs using weighting coefficients of SENZI Invited Peer-reviewed

    Shuichi Sakamoto, Yoshiki Satou, Jorge Trevino, Yoiti Suzuki

    2014 TENTH INTERNATIONAL CONFERENCE ON INTELLIGENT INFORMATION HIDING AND MULTIMEDIA SIGNAL PROCESSING (IIH-MSP 2014)　IIHMSP-2014-IS23-03　606-609　2014

    DOI： 10.1109/IIH-MSP.2014.157 　

  118. High-order Ambisonics auditory displays for the scalable presentation of immersive 3D audio-visual contents Peer-reviewed

    Jorge Trevino, Takuma Okamoto, Cesar Salvador, Yukio Iwaya, Zhenglie Cue, Shuichi Sakamoto, Yo-ti Suzuki

    Proc. the 23rd International Conference on Artificial Reality and Telexistence (ICAT2013)　2013/12/11

  119. Compression of perceived auditory space during uniformaly-accelerated forward self-motion Invited Peer-reviewed

    Shuichi Sakamoto, Wataru Teramoto, Fumimasa Furune, Yo-iti Suzuki, Jiro Gyoba

    Proc. The 21st International Congress on Acoustics　050128　1-9　2013/06

  120. Improvement of accuracy of 3D sound space synthesized by real-time "SENZI", a sound space information acquisition system using spherical array with numerous microphones Invited Peer-reviewed

    Shuichi Sakamoto, Satoshi Hongo, Takuma Okamoto, Yukio Iwaya, Yo-iti Suzuki

    Proc. The 21st International Congress on Acoustics　055051　1-9　2013/06

  121. Dominance of head-motion-coupled directional cues over other cues during walking depends upon source spectrum Invited Peer-reviewed

    William L. Martens, Shuichi Sakamoto, Luis Miranda, Densil Cabrera

    Proc. The 21st International Congress on Acoustics　050129　1-10　2013/06

  122. An efficient finite-impulse-response filter model of head-related impulse response Peer-reviewed

    Junfeng Li, Aijun Li, Shuichi Sakamoto, Yo-iti Suzuki, Yonghong Yan

    Proc. The 21st International Congress on Acoustics　050173　1-7　2013/06

  123. Effects of body vibration on the perceived reality in multi-modal contents Peer-reviewed

    Shuichi Sakamoto, Gen Hasegawa, Akio Honda, Yukio Iwaya, Yo-iti Suzuki, Jiro Gyoba

    Proc. Three Dimensional Systems and Applications (3DSA)　P2-3　1-4　2013/06

  124. High definition 3D auditory displays and microphone arrays for the use with future 3D TV Invited Peer-reviewed

    Yo-iti Suzuki, Jorge Trevino, Takuma Okamoto, Zhenglie Cui, Shuichi Sakamoto, Yukio Iwaya

    Proc. Three Dimensional Systems and Applications (3DSA)　1-4　2013/06

  125. Improvement of accuracy of three-dimensional sound space synthesized by real-time "SENZI", a sound space information acquisition system using spherical array with numerous microphones Peer-reviewed

    Shuichi Sakamoto, Satoshi Hongo, Takuma Okamoto, Yukio Iwaya, Yoiti Suzuki

    Proceedings of Meetings on Acoustics　19　2013

    DOI： 10.1121/1.4801090 　

    ISSN： 1939-800X

  126. Compression of perceived auditory space during forward self-motion Peer-reviewed

    Shuichi Sakamoto, Wataru Teramoto, Fumimasa Furune, Yoiti Suzuki, Jiro Gyoba

    Proceedings of Meetings on Acoustics　19　2013

    DOI： 10.1121/1.4799737 　

    ISSN： 1939-800X

  127. Determinants of Senses of Presence and Verisimilitude in Audio-Visual Contents Peer-reviewed

    Honda Akio, Kanda Takayuki, Shibata Hiroshi, Asai Nobuko, Teramoto Wataru, Sakamoto Shuichi, Iwaya Yukio, Gyoba Jiro, Suzuki Yoiti

    Transactions of the Virtual Reality Society of Japan　18　(1)　93-101　2013

    Publisher: THE VIRTUAL REALITY SOCIETY OF JAPAN

    DOI： 10.18974/tvrsj.18.1_93 　

    ISSN： 1344-011X

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    Senses of presence and verisimilitude are affected differently by temporal asynchrony between audio-visual components of audio-visual content. To investigate whether this result is valid more generally, we conducted an experiment using a clip of western orchestral music. Results revealed that the sense of verisimilitude is more sensitive to audiovisual synchronicity than to the display size, whereas the sense of presence is more sensitive to the spatial size than the temporal property. These findings corresponded well with those of the previous study, which indicated that the sense of verisimilitude is distinguishable from the sense of presence. Furthermore, we discussed important considerations related to measurement for Kansei information such as the sense of presence and verisimilitude.

  128. ベクション感覚と平衡感覚刺激並存下の音像定位 Peer-reviewed

    崔正烈, 寺島英明, 坂本修一, 岩谷幸雄, 鈴木陽一

    日本バーチャルリアリティ学会論文誌　18　(1)　27-35　2013

    Publisher: THE VIRTUAL REALITY SOCIETY OF JAPAN

    DOI： 10.18974/tvrsj.18.1_27 　

    ISSN： 1344-011X

    More details Close

    In this study, we investigated the effect of self-motion perception induced by visual stimuli, i.e. vection and/or vestibular information on sound localization. To make an observer perceive vection we presented random dots which were moving laterally on a wide screen. To present vestibular stimuli we used a three-degree of freedom (3 DOF) motion platform which inclines right or left. Sound stimuli were presented behind the screen when an observer perceived self-motion induced by visual stimuli and/or the platform. The observer's task was to point the position of the sound image on the screen. Experimental results showed that perceived sound position shifted to the opposite direction of perceived self-motion induced by visual information, regardless of the direction of vestibular information. Moreover, this tendency was observed only one side of median sagittal plane; the side whose direction was same as that of the movement of visual information. The result indicates that the auditory spatial perception is changed by the self-motion due to the coexistence of visually induced self-motion and vestibular information.

  129. 信号対雑音比調整による単語リスト間の単語了解度差補正－親密度別単語了解度試験用音声データセット(FW07)を用いた検証－ Peer-reviewed

    近藤公久, 坂本修一, 天野成昭, 鈴木陽一

    日本音響学会誌　69　(5)　224-231　2013

    DOI： 10.20697/jasj.69.5_224 　

  130. Accuracy of head-related transfer functions synthesized with spherical microphone arrays Peer-reviewed

    Cesar D. Salvador Castaneda, Shuichi Sakamoto, Jorge A. Trevino Lopez, Junfeng Li, Yonghong Yan, Yoiti Suzuki

    Proceedings of Meetings on Acoustics　19　1-9　2013

    DOI： 10.1121/1.4800833 　

    ISSN： 1939-800X

  131. Auditory space perception during active and passive self-motion Invited Peer-reviewed

    Shuichi Sakamoto, Wataru Teramoto, Yoiti Suzuki, Jiro Gyoba

    2013 NINTH INTERNATIONAL CONFERENCE ON INTELLIGENT INFORMATION HIDING AND MULTIMEDIA SIGNAL PROCESSING (IIH-MSP 2013)　IIHMSP-2013-IS12-10　330-333　2013

    DOI： 10.1109/IIH-MSP.2013.90 　

  132. Head-related transfer function modeling based on finite-impulse response Invited Peer-reviewed

    Jian Zhang, Risheng Xia, Chundong Xu, Junfeng Li, Yonghong Yan, Shuichi Sakamoto

    2013 NINTH INTERNATIONAL CONFERENCE ON INTELLIGENT INFORMATION HIDING AND MULTIMEDIA SIGNAL PROCESSING (IIH-MSP 2013)　IIHMSP-2013-IS12-07　318-321　2013

    DOI： 10.1109/IIH-MSP.2013.87 　

  133. Compression of Auditory Space during Forward Self-Motion Peer-reviewed

    Wataru Teramoto, Shuichi Sakamoto, Fumimasa Furune, Jiro Gyoba, Yoiti Suzuki

    PLOS ONE　7　(6)　e39402　2012/06

    DOI： 10.1371/journal.pone.0039402 　

    ISSN： 1932-6203

  134. The effect of self-motion perception on horizontal sound localization in front and rear spaces Peer-reviewed

    Cui, Z, Teramoto, W, Sakamoto, S, Iwaya, Y, Suzuki, Y

    The Transaction of Human Interface Society　14　41-48　2012

  135. Sounds can alter the perceived direction of a moving visual object Peer-reviewed

    Wataru Teramoto, Souta Hidaka, Yoichi Sugita, Shuichi Sakamoto, Jiro Gyoba, Yukio Iwaya, Yoiti Suzuki

    JOURNAL OF VISION　12　(3)　1-12　2012

    DOI： 10.1167/12.3.11 　

    ISSN： 1534-7362

  136. ベクションが頭部前後における水平方向の音像定位に及ぼす影響 Peer-reviewed

    崔正烈, 寺本渉, 坂本修一, 岩谷幸雄, 鈴木陽一

    ヒューマンインタフェース学会論文誌　14　(2)　151-158　2012

  137. Effect of consonance between features and voice impression on the McGurk effect Peer-reviewed

    Shuichi Sakamoto, Hiroshi Mishima, Yo-iti Suzuki

    Interdisciplinary Information Sciences Journal　18　(2)　83-85　2012

    Publisher: The Editorial Committee of the Interdisciplinary Information Sciences

    DOI： 10.4036/iis.2012.83 　

    ISSN： 1340-9050

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    The McGurk effect is one of the typical phenomena caused by human multi-modal information processing between auditory and visual speech perception. In this paper, we investigated the relation between the degree of the McGurk effect and the perceived impression by speech sounds and moving images of the talker's face. As stimuli, uttered speech sounds were combined with moving images of a different talker's face. These stimuli were presented to observers, who were asked to respond to what the talker was saying. At the same time, they were asked to report their subjective impressions of these stimuli. Matching between the voice and moving image was used as the index of the judgment. Results showed that matching between a voice and a talker's facial movements affected the degree of the McGurk effect, suggesting that audio–visual kansei information affects phoneme perception.

  138. 3D spatial sound systems compatible with human's active listening to realize rich high-level kansei information Peer-reviewed

    Yo-iti Suzuki, Takuma Okamoto, Jorge Trevino, Zheng-Lie Cui, Yukio Iwaya, Shuichi Sakamoto, Makoto Otani

    Interdisciplinary Information Sciences Journal　18　(2)　71-82　2012

    Publisher: Graduate School of Information Sciences, Tohoku University

    DOI： 10.4036/iis.2012.71 　

    ISSN： 1340-9050

    eISSN： 1347-6157

  139. Binaural speech enhancement method by wavelet transform based on interaural level and argument differences Peer-reviewed

    Satoshi Hongo, Shuichi Sakamoto, Yoiti Suzuki

    International Conference on Wavelet Analysis and Pattern Recognition　290-295　2012

    DOI： 10.1109/ICWAPR.2012.6294795 　

    ISSN： 2158-5695 2158-5709

  140. Toward 3D spatial audio systems with high sense-of-presense Invited

    Yôiti Suzuki, Takuma Okamoto, Jorge Trevino, Toshiyuki Kimura, Shuichi Sakamoto, Zheng Lie Cui, Michiaki Katsumoto, Yukio Iwaya

    Proc. 5th International Universal Communication Symposium (IUCS)　TS-3-1　1-10　2011/10

  141. Spoken word intelligibility tests under noisy conditions Invited Peer-reviewed

    Tadahisa Kondo, Shuichi Sakamoto, Shigeaki Amano, Yôiti Suzuki

    Proc. internoise2011　SS25:Wed-3-6　1-7　2011/09

  142. A new method for measurement of word intelligibility under noisy and reverberant environment in a short duration Invited Peer-reviewed

    Hiroshi Sato, Shuichi Sakamoto, Tadahisa Kondo, Shigeaki Amano, Yôiti Suzuki

    Proc. internoise2011　SS25:Wed-3-3　1-6　2011/09

  143. Measurement and reproduction of high-definition sound space information using numerous microphones and loudspeakers Invited Peer-reviewed

    Yukio Iwaya, Takuma Okamoto, Jorge Treviño, Shuichi Sakamoto, Yôiti Suzuki

    Proc. internoise2011　SS20:Mon-4-8　1-8　2011/09

  144. Two-stage binaural speech enhancement with Wiener filter for high-quality speech communication Peer-reviewed

    Junfeng Li, Shuichi Sakamoto, Satoshi Hongo, Masato Akagi, Yoiti Suzuki

    SPEECH COMMUNICATION　53　(5)　677-689　2011/05

    DOI： 10.1016/j.specom.2010.04.009 　

    ISSN： 0167-6393

    eISSN： 1872-7182

  145. Speech identification with time-varying visual information extracted from the lip area Peer-reviewed

    Kaori Asakawa, Shuichi Sakamoto, Akihiro Tanaka, Toru Abe, Yukio Iwaya, Yôiti Suzuki

    Proc. 2011 RISP International Workshop on Nonlinear Circuits, Communications and Signal Processing (NCSP’11)　3PM2-3-2　419-420　2011/03

  146. Auditory motion information drives visual motion perception Peer-reviewed

    Souta Hidaka, Wataru Teramoto, Yoichi Sugita, Yuko Manaka, Shuichi Sakamoto, Yôiti Suzuki

    PLoS ONE　6　(3)　e17499　2011

    DOI： 10.1371/journal.pone.0017499 　

    ISSN： 1932-6203

  147. 腹話術効果の時間特性 Peer-reviewed

    小林まおり, 藤井真治, 岩谷幸雄, 坂本修一, 鈴木陽一

    日本バーチャルリアリティ学会論文誌　16　(1)　93-97　2011

    Publisher: THE VIRTUAL REALITY SOCIETY OF JAPAN

    DOI： 10.18974/tvrsj.16.1_93 　

    ISSN： 1344-011X

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    The perception of the spatial location of an auditory stimulus can be captured by a spatially disparate visual stimulus, a phenomenon known as the ventriloquism effect. Many studies have shown temporal and spatial dependency of this phenomenon but its temporal dynamics are not fully understood. In this study, we presented participants with a three-minute of audio-visual stimuli, consisting of a pair of light and sound noise with a spatial disparity of either 0, 5 or 10 degrees. Ten participants were instructed to observe the audio-visual stimuli, and to report their position consistency of stimuli by pushing one of two bottoms, which indicated "same" or "different" respectively. The time series reported were analyzed as perceptual transitions. The results showed that (1) the mean total duration of the "same location" response increased as the disparities between noise and light decreased, (2) the percept switched during the stimulus presentation in all disparity condition after initial build-up of perception of "same location", and (3) the mean transition times varied depending on the disparity condition. These results show that the ventriloquism effect varies with observation time, suggesting that audiovisual spatial integration have time-varying nature.

  148. Audiovisual synchrony perception of simplified speech sounds heard as speech and non-speech Peer-reviewed

    Kaori Asakawa, Akihiro Tanaka, Shuichi Sakamoto, Yukio Iwaya, Yôiti Suzuki

    Acoustical Science and Technology　32　(3)　125-128　2011

    DOI： 10.1250/ast.32.125 　

    ISSN： 1346-3969 1347-5177

  149. 視聴覚コンテンツの臨場感と迫真性

    鈴木陽一, 寺本 渉, 吉田和博, 浅井暢子, 日高聡太, 坂本修一, 岩谷幸雄, 行場次朗

    信学技報　111　(74)　29-36　2011

  150. Effects of pause duration and speech rate on sentence intelligibility in younger and older adult listeners Peer-reviewed

    Akihiro Tanaka, Shuichi Sakamoto, Yôiti Suzuki

    Acoustical Science and Technology　32　(6)　264-267　2011

    DOI： 10.1250/ast.32.264 　

    ISSN： 1346-3969 1347-5177

  151. Three-dimensional acoustic sensing and display systems realizing high sense-of-presence Invited Peer-reviewed

    Yôiti Suzuki, Yukio Iwaya, Shuichi Sakamoto, Takuma Okamoto, Makoto Otani

    Proc. 12th Takayanagi Kenjiro Memorial Symposium　S5-2-1-S5-2-5　2010/11

  152. Effects of speech-rate conversion on asynchrony perception of audio-visual speech Peer-reviewed

    Shiho Miyazawa, Akihiro Tanaka, Shuichi Sakamoto, Takehiko Nishimoto

    Proc. International Conference on Auditory-Visual Speech Processing 2010　190-193　2010/09

  153. Visual motion perception induced by sounds in vertical plane Peer-reviewed

    Wataru Teramoto, Yuko Manaka, Souta Hidaka, Yoichi Sugita, Ryota Miyauchi, Shuichi Sakamoto, Jiro Gyoba, Yukio Iwaya, Yoiti Suzuki

    NEUROSCIENCE LETTERS　479　(3)　221-225　2010/08

    DOI： 10.1016/j.neulet.2010.05.065 　

    ISSN： 0304-3940

  154. A 3D sound-space recording system using spherical microphone array with 252-ch microphones Peer-reviewed

    Shuichi Sakamoto, Jun'ichi Kodama, Satoshi Hongo, Takuma Okamoto, Yukio Iwaya, Yôiti Suzuki

    Proc. 20th International Congress on Acoustics　736　2010/08

  155. Audio-visual temporal perception for perceptually simplified speech sound and natural face image

    Kaori Asakawa, Akihiro Tanaka, Shuichi Sakamoto, Yôiti Suzuki

    Proc. of 5th International Symposium on Medical, Bio- and Nano-Electronics in Sendai　139-140　2010/02

  156. 自己運動知覚における視覚系と前庭感覚系とのマルチモーダル処理の時間特性(日本基礎心理学会第28回大会,大会発表要旨)

    久保寺 俊朗, Grove Philip M., 坂本 修一, 鈴木 陽一, 櫻井 研三

    基礎心理学研究　28　(2)　276-276　2010

    Publisher: 日本基礎心理学会

    DOI： 10.14947/psychono.KJ00006393880 　

  157. 聴性脳幹インプラントを用いた聴能再獲得に関する検討

    織田潔, 川瀬哲明, 山内大輔, 日高浩史, 堀容子, 小林俊光, 坂本修一, 鈴木陽一

    ナノ医工学年報2009 東北大学グローバルCOEプログラム 新世紀世界の成長焦点に築くナノ医工学拠点　129-138　2010

  158. 「迫真性」を規定する時空間情報 Peer-reviewed

    寺本渉, 吉田和博, 日高聡太, 浅井暢子, 行場次朗, 坂本修一, 岩谷幸雄, 鈴木陽一

    日本バーチャルリアリティ学会論文誌　15　(3)　483-486　2010

    Publisher: THE VIRTUAL REALITY SOCIETY OF JAPAN

    DOI： 10.18974/tvrsj.15.3_483 　

    ISSN： 1344-011X

    More details Close

    For virtual reality systems, the enhancement of a sense of presence (a subjective experience of being in one place even when one is physically situated in another) has been the most important issue. Both theoretically and empirically, the sense of presence has been found to relate dominantly to background components contained in a scene. In contrast, the reality or virtuality which can be assumed to link essentially to foreground components in a scene has not been investigated in detail. The present study defined the latter type of sense as vraisemblance (verisimilitude), and made an exploratory investigation into spatio-temporal characteristics responsible for the higher vraisemblance by using a scene containing Shishi-odoshi (a traditional Japanese fountain made of bamboos) in a Japanese garden as audio-visual stimuli. In Experiment 1, the effects of the field size of view and the sound pressure level of the background were investigated. Higher vraisemblance was observed with the middle field size of view with the original sound pressure level of the background, whereas higher sense of presence was observed with the larger field size of view with the larger background sound. In Experiment 2, the effect of temporal asynchrony between the foreground audio-visual stimuli produced by Shishi-odoshi was investigated. The results show that the range of temporal-window for the audio-visual stimuli necessary for high vraisemblance was different from those for high presence. These findings suggest that the sense of vraisemblance can be distinguishable from the sense of presence, and deeply involved to the foreground-based aesthetic impression in a scene.

  159. 252ch等密度球状アレイを用いた3次元音場情報取得システム

    坂本修一, 小玉純一, 本郷哲, 岡本拓磨, 岩谷幸雄, 鈴木陽一

    信学技報　2010

  160. 親密度別単語了解度試験用音声データセット（FW03）に収録された単音節音声の雑音下における認知閾 Peer-reviewed

    近藤公久, 坂本修一, 天野成昭, 鈴木陽一

    日本音響学会誌　66　(3)　105-111　2010

    DOI： 10.20697/jasj.66.3_105 　

  161. Effects of microphone arrangements on the accuracy of a spherical microphone array (SENZI) in acquiring high-definition 3D sound space information Peer-reviewed

    Jun'ichi Kodama, Shuichi Sakamoto, Satoshi Hongo, Takuma Okamoto, Yukio Iwaya, Yôiti Suzuki

    Proc. International Workshop on the Principles and Applications of Spatial Hearing (IWPASH)　2009/11

  162. Multimodal interaction of auditory spatial cues and passive whole-body movement through virtual space Invited Peer-reviewed

    Shuichi Sakamoto, William L. Martens, Yôiti Suzuki

    Proc. of The 10th Western Pacific Acoustics Conference (WESPAC X )　0229　1-8　2009/09

  163. A new comprehensive 3D sound-space sensing and reproduction method by a symmetrically and densely arranged microphone array Invited Peer-reviewed

    Shuichi Sakamoto, Satoshi Hongo, Yôiti Suzuki

    Proc. of The 10th Western Pacific Acoustics Conference (WESPAC X )　0245　1-7　2009/09

  164. Aging effect on audio-visual speech asynchrony perception: comparison of time-expanded speech and a moving image of a talker’s face Peer-reviewed

    Shuichi Sakamoto, Akihiro Tanaka, Shun Numahata, Atsushi Imai, Tohru Takagi, Yôiti Suzuki

    Proc. of International Conference on Auditory-Visual Speech Processing (AVSP)　9-12　2009/09

  165. Advancement of two-stage binaural speech enhancement (TS-BASE) for high quality speech communication Invited Peer-reviewed

    Junfeng Li, Shuichi Sakamoto, Satoshi Hongo, Masato Akagi, Yôiti Suzuki

    Proc. The 10th Western Pacific Acoustics Conference (WESPAC X)　184　1-6　2009/09

  166. Bimodal audio-visual training enhances auditory adaptation process Peer-reviewed

    Tetsuaki Kawase, Shuichi Sakamoto, Yoko Hori, Atsuko Maki, Yoiti Suzuki, Toshimitsu Kobayashi

    NEUROREPORT　20　(14)　1231-1234　2009/09

    DOI： 10.1097/WNR.0b013e32832fbef8 　

    ISSN： 0959-4965

  167. Visual speech improves the intelligibility of time-expanded auditory speech Peer-reviewed

    Akihiro Tanaka, Shuichi Sakamoto, Komi Tsumura, Yoiti Suzuki

    NEUROREPORT　20　(5)　473-477　2009/03

    DOI： 10.1097/WNR.0b013e3283279ae8 　

    ISSN： 0959-4965

  168. ウェーブレット変換型2 段階バイノーラル音声強調アルゴリズムの検討

    菊地 将輝, 本郷 哲, 坂本 修一, 鈴木 陽一

    電気関係学会東北支部連合大会講演論文集　2009　154-154　2009

    Publisher: 電気関係学会東北支部連合大会実行委員会

    DOI： 10.11528/tsjc.2009.0_154 　

  169. New objective assessment of acoustic transfer function via patulous eustachian tube using time-stretched pulse.

    Tetsuaki Kawase, Yoko Hori, Yasushi Baba, Toshimitsu Kobayashi, Shuichi Sakamoto, Yoichi Suzuki

    Nano-Biomedical Engineering （Imperial College Press）　225-232　2009

  170. Development of familiarity-controlled word lists 2003 (FW03) to assess spoken-word intelligibility in Japanese Peer-reviewed

    Shigeaki Amano, Shuichi Sakamoto, Tadahisa Kondo, Yoti Suzuki

    SPEECH COMMUNICATION　51　(1)　76-82　2009/01

    DOI： 10.1016/j.specom.2008.07.002 　

    ISSN： 0167-6393

    eISSN： 1872-7182

  171. マルチモーダル情報処理を指向した音響情報処理技術の動向

    鈴木陽一, 岩谷幸雄, 坂本修一, 宮内良太, 矢入聡

    東北大学電通談話記録　77　(2)　19-26　2009

  172. MULTIMODAL INTERACTION OF AUDITORY SPATIAL CUES AND PASSIVE OBSERVER MOVEMENT IN SIMULATED SELF MOTION Invited Peer-reviewed

    William L. Martens, Shuichi Sakamoto, Yoiti Suzuki

    2009 3DTV-CONFERENCE: THE TRUE VISION - CAPTURE, TRANSMISSION AND DISPLAY OF 3D VIDEO　281-+　2009

    ISSN： 2161-2021

  173. Two-stage binaural speech enhancement with wiener filter based on equalization-cancellation model Peer-reviewed

    Junfeng Li, Shuichi Sakamoto, Satoshi Hongo, Masato Akagi, Yôiti Suzuki

    IEEE Workshop on Applications of Signal Processing to Audio and Acoustics　133-136　2009

    DOI： 10.1109/ASPAA.2009.5346471 　

  174. Effect of speed difference between time-expanded speech and moving image of talker's face on word intelligibility Peer-reviewed

    Shuichi Sakamoto, Akihiro Tanaka, Komi Tsumura, Yoiti Suzuki

    JOURNAL ON MULTIMODAL USER INTERFACES　2　(3-4)　199-203　2008/12

    DOI： 10.1007/s12193-009-0018-4 　

    ISSN： 1783-7677

  175. Adaptive beta-order generalized spectral subtraction for speech enhancement Peer-reviewed

    Junfeng Li, Shuichi Sakamoto, Satoshi Hongo, Masato Akagi, Yoiti Suzuki

    SIGNAL PROCESSING　88　(11)　2764-2776　2008/11

    DOI： 10.1016/j.sigpro.2008.06.005 　

    ISSN： 0165-1684

  176. Selective effects of auditory stimuli on tactile roughness perception Peer-reviewed

    Yuika Suzuki, Jiro Gyoba, Shuichi Sakamoto

    BRAIN RESEARCH　1242　87-94　2008/11

    DOI： 10.1016/j.brainres.2008.06.104 　

    ISSN： 0006-8993

    eISSN： 1872-6240

  177. Temporal recalibration in audio-visual speech integration using temporal order judgments

    Kaori Asakawa, Akihiro Tanaka, Hisato Imai, Shuichi Sakamoto, Yôiti Suzuki

    Proc. of The 1st Student Organizing International Mini-Conference on Information Electronics Systems　161-162　2008/10

  178. Two-input two-output speech enhancement based on speech absence probability calculated from two input signals Peer-reviewed

    Junfeng Li, Ai Sasaki, Shuichi Sakamoto, Satoshi Hongo, Yôiti Suzuki

    Proc. internoise2008 (2008)　0715　1-6　2008/10

  179. Effect of audio-visual asynchrony between time-expanded speech and a moving image of a talker's face on detection and tolerance thresholds Peer-reviewed

    Shuichi Sakamoto, Akihiro Tanaka, Shun Numahata, Atsushi Imai, Tohru Takagi, Yôiti Suzuki

    Proc. International Conference on Auditory-Visual Speech Processing 2008 (AVSP2008)　79-82　2008/09

  180. Improved two-stage binaural speech enhancement based on accurate interference estimation for hearing aids Peer-reviewed

    Junfeng Li, Shuichi Sakamoto, Satoshi Hongo, Masato Akagi, Yôiti Suzuki

    in Proc. International Hearing Aid Research Conference　2008/08

  181. Experimental evaluation of the two-stage binaural speech enhancement with Wiener filter for speech enhancement and sound localization Peer-reviewed

    Junfeng Li, Shuichi Sakamoto, Satoshi Hongo, Masato Akagi, Yôiti Suzuki

    Proc. ISAAR2009　2008/08

  182. Perceived self motion in virtual acoustic space facilitated by passive whole-body movement Peer-reviewed

    William L. Martens, Shuichi Sakamoto, Yôiti Suzuki

    Proc. the 14th International Conference on Auditory Display (ICAD2008)　23　1-4　2008/08

  183. A two-stage binaural speech enhancement approach for hearing aids with preserving binaural benefits in noisy environments Peer-reviewed

    Junfeng Li, Shuichi Sakamoto, Satoshi Hongo, Masato Akagi, Yo-iti Suzuki

    in Proc. Forum Acousticum 2008　pp. 723-727　2008/06

  184. Audio-visual speech for impaired listeners Invited

    Tetsuaki Kawase, Yoko Hori, Keiichiro Yamaguchi, Masatoshi Itoh, Toshikatsu Fujii, Shuichi Sakamoto, Yo-iti Suzuki, Toshimitsu Kobayashi

    Proc. of 3rd International Symposium on Medical, Bio- and Nano-Electronics in Sendai　O2-4　33-33　2008/03

  185. Two-input two-output speech enhancement using adaptive filter and soft decision mask filter

    Ai Sasaki, Shuichi Sakamoto, Satoshi Hongo, Junfeng Li, Yo-iti Suzuki

    Proc. of 3rd International Symposium on Medical, Bio- and Nano-Electronics in Sendai　P-31　171-172　2008/03

  186. Effects of frequency-modulated sounds on the perceived magnitude of self-motion induced by vestibular information

    Mikio Seto, Shuichi Sakamoto, Maori Kobayashi, Kenzo Sakurai, Jiro Gyoba, Yo-iti Suzuki

    Proc. of 3rd International Symposium on Medical, Bio- and Nano-Electronics in Sendai　P-32　173-174　2008/03

  187. Effect of time-expanded speech on detection/tolerance thresholds of audio-visual asynchrony

    Shun Numahata, Shuichi Sakamoto, Akihiro Tanaka, Atsushi Imai, Toru Takagi, Yo-iti Suzuki

    Proc. of 3rd International Symposium on Medical, Bio- and Nano-Electronics in Sendai　P-33　175-176　2008/03

  188. The effect of linearly moving sound image on perceived self-motion with vestibular information Peer-reviewed

    Shuichi Sakamoto, Fumihiko Suzuki, Yôiti Suzuki, Jiro Gyoba

    Acoustical Science and Technology　29　(6)　391-393　2008

    DOI： 10.1250/ast.29.391 　

    ISSN： 1346-3969 1347-5177

  189. THE IMPROVED TS-BASE APPROACHES WITH INTERFERENCE COMPENSATION AND THEIR EVALUATIONS FOR SPEECH ENHANCEMENT Peer-reviewed

    Junfeng Li, Shuichi Sakamoto, Satoshi Hongo, Masato Akagi, Yoiti Suzuki

    2008 6TH INTERNATIONAL SYMPOSIUM ON CHINESE SPOKEN LANGUAGE PROCESSING, PROCEEDINGS　141-144　2008

    DOI： 10.1109/CHINSL.2008.ECP.47 　

  190. SENZI and ASURA: New high-precision sound-space sensing systems based on symmetrically arranged numerous microphones Peer-reviewed

    Shuichi Sakamoto, Satoshi Hongo, Ryo Kadoi, Yoiti Suzuki

    PROCEEDINGS OF THE SECOND INTERNATIONAL SYMPOSIUM ON UNIVERSAL COMMUNICATION　429-+　2008

    DOI： 10.1109/ISUC.2008.15 　

  191. Objective assessment of autophony in patients with patulous Eustachian tube Peer-reviewed

    Yoko Hori, Tetsuaki Kawase, Takeshi Oshima, Shuichi Sakamoto, Toshimitsu Kobayashi

    EUROPEAN ARCHIVES OF OTO-RHINO-LARYNGOLOGY　264　(12)　1387-1391　2007/12

    DOI： 10.1007/s00405-007-0374-1 　

    ISSN： 0937-4477

  192. The perception of spectrally compressed noise-vocoded speech sound

    Tetsuaki Kawase, Yoko Hori, Shuichi Sakamoto, Yôiti Suzuki, Toshimitsu Kobayashi

    9th Japan-Taiwan conference in Otolaryngology, Head and Neck Surgery　2007/11

  193. 周波数変換帯域雑音音声を用いた聴覚リハビリテーションに関する模擬的検討(1) : トレーニング時の正答フィードバックの重要性について

    川瀬 哲明, 堀 容子, 牧 敦子, 小林 俊光, 坂本 修一, 鈴木 陽一

    Audiology Japan　50　(5)　505-506　2007/09/05

    Publisher: Japan Audiological Society

    DOI： 10.4295/audiology.50.505 　

    ISSN： 0303-8106

  194. Auditory-visual speech perception and intermodal asynchrony Invited Peer-reviewed

    Akihiro Tanaka, Shuichi Sakamoto, Yo-iti Suzuki, Komi Tsumura

    Proc. 19th International Congress on Acoustics　PPA-03-008-IP　1-6　2007/09

  195. Effects of auditory and visual information on the perceived direction of self-motion Invited Peer-reviewed

    Shuichi Sakamoto, Yo-iti Suzuki, Jiro Gyoba

    Proc. 19th International Congress on Acoustics　PPA-03-002-IP　1-6　2007/09

  196. Effects of intermodal timing difference and speed difference on intelligibility of auditory-visual speech in younger and older adults Peer-reviewed

    Akihiro Tanaka, Shuichi Sakamoto, Komi Tsumura, Yo-iti Suzuki

    Proc. International Conference on Auditory-Visual Speech Processing 2007　258-263　2007/08

  197. Effect of speed difference between time-expanded speech and talker's moving image on word or sentence intelligibility Peer-reviewed

    Shuichi Sakamoto, Akihiro Tanaka, Komi Tsumura, Yo-iti Suzuki

    Proc. International Conference on Auditory-Visual Speech Processing 2007　238-242　2007/08

  198. Binaural speech enhancement for hearing aids Peer-reviewed

    Junfeng Li, Shuichi Sakamoto, Satoshi Hongo, Yo-iti Suzuki

    Proc. of Japan-China Joint Conference on Acoustics　2007/06

  199. Noise Reduction Based on Adaptive beta-Order Generalized Spectral Subtraction for Speech Enhancement Peer-reviewed

    Junfeng Li, Shuichi Sakamoto, Satoshi Hongo, Masato Akagi, Yoiti Suzuki

    INTERSPEECH 2007: 8TH ANNUAL CONFERENCE OF THE INTERNATIONAL SPEECH COMMUNICATION ASSOCIATION, VOLS 1-4　WeB.P3-2　577-+　2007

  200. Application of Dichotic Listening to Hearing Aids

    Ai Sasaki, Atsunobu Murase, Shuichi Sakamoto, Yo-iti Suzuki, Tetsuaki Kawase, Toshimitsu Kobayashi

    Proc. of 2nd International Symposium on Bio- and Nano-Electronics in Sendai　2006/12

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    通研インポート200703

  201. Development of FW03: Japanese word lists for spoken-word intelligibility test Invited Peer-reviewed

    Shigeaki AMANO, Shuichi SAKAMOTO, Tadahisa KONDO, Yo-iti SUZUKI

    Proc. of 9th Western Pacific Acoustics Conference　231　1-6　2006/06

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    通研インポート200703

  202. Speech recognition threshold of words in FW03 Invited Peer-reviewed

    Shuichi Sakamoto, Tadahiro Yoshikawa, Shigeaki Amano, Yo-iti Suzuki, Tadahisa Kondo

    Proc. of 9th Western Pacific Acoustics Conference　579　1-6　2006/06

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    通研インポート200703

  203. 映像と音声の提示タイミングおよび提示速度の違いが単語音声認知に及ぼす影響(日本基礎心理学会第25回大会,大会発表要旨)

    田中 章浩, 津村 光美, 坂本 修一, 鈴木 陽一

    基礎心理学研究　25　(1)　133-134　2006

    Publisher: 日本基礎心理学会

    DOI： 10.14947/psychono.KJ00004450550 　

  204. Effects of dividing frequency in filtering for dichotic presentation to reduce masking to a consonant by the preceding vowel Peer-reviewed

    Atsunobu Murase, Shuichi Sakamoto, Yôiti Suzuki, Tetsuaki Kawase, Toshimitsu Kobayashi

    Acoustical Science and Technology　27　(4)　245-247　2006

    DOI： 10.1250/ast.27.245 　

    ISSN： 1346-3969 1347-5177

  205. New 20-word lists for word intelligibility test in Japanese Peer-reviewed

    Sakamoto Shuichi, Yoshikawa Tadahiro, Amano Shigeaki, Suzuki Yoiti, Kondo Tadahisa

    INTERSPEECH 2006 AND 9TH INTERNATIONAL CONFERENCE ON SPOKEN LANGUAGE PROCESSING, VOLS 1-5　2158-+　2006

  206. Effect of dichotic presentation on speech intelligibility in the elderly Peer-reviewed

    Atsunobu Murase, Shuichi Sakamoto, Fumie Nakajima, Yo-iti Suzuki, Tetsuaki Kawase, Toshimitsu Kobayashi

    Audiology Japan　48　(1)　59-64　2005

    Publisher: Japan Audiological Society

    DOI： 10.4295/audiology.48.59 　

    ISSN： 0303-8106

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    通研ＤＢインポート

  207. Effect of dichotic presentation on sound localization by the elderly Peer-reviewed

    Atsunobu Murase, Fumie Nakajima, Shuichi Sakamoto, Yo-iti Suzuki, Tetsuaki Kawase, Toshimitsu Kobayashi

    Audiology Japan　48　(6)　633-643　2005

    Publisher: Japan Audiological Society

    DOI： 10.4295/audiology.48.633 　

    ISSN： 0303-8106

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    通研ＤＢインポート

  208. Multi-modal perception relating to hearing and its applications for acoustic communication systems Invited

    Yoiti Suzuki, Shuichi Sakamoto, Yukio Iwaya

    Proceedings of GSIS International Symposium on Information Sciences of Era: Brain, Mind, and Society　39-64　2005

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  209. A compensation method for word-familiarity difference with SNR control in intelligibility test Peer-reviewed

    Shuichi Sakamoto, Naoki Iwaoka, Yo-iti Suzuki, Shigeaki Amano, Tadahisa Kondo

    Proc. INTERSPEECH2004 (ICSLP), TuB901o.2　TuB901o.2　1-4　2004/10

  210. Complementary relationship between familiarity and SNR in word intelligibility test Peer-reviewed

    Shuichi Sakamoto, Naoki Iwaoka, Yôiti Suzuki, Shigeaki Amano, Tadahisa Kondo

    Acoustical Science and Technology　25　(4)　290-292　2004/07

    DOI： 10.1250/ast.25.290 　

    ISSN： 1346-3969

  211. Compensation between word familiarity and SNR in word intelligibility test Peer-reviewed

    Shuichi Sakamoto, Naoki Iwaoka, Yo-iti Suzuki, Shigeaki Amano, Tadahisa Kondo

    Proc. 18th International Congress on Acoustics　I　229-232　2004/04

  212. Effect and sound localization with dichotic-listening digital hearing aids Peer-reviewed

    Atsunobu Murase, Fumie Nakajima, Shuichi Sakamoto, Yo-iti Suzuki, Tetsuaki Kawase

    Proc. 18th International Congress on Acoustics　II　1519-1522　2004/04

  213. Effect of auditory information on self-motion perception Invited Peer-reviewed

    Yo-iti Suzuki, Shuichi Sakamoto, Jiro Gyoba

    Proc. 18th International Congress on Acoustics　III　2051-2054　2004/04

  214. The effect of familiarity on mora indentification in word intelligibility tests Peer-reviewed

    Shuichi Sakamoto, Shigeaki Amano, Yo-iti Suzuki, Tadahisa Kondo, Kenji Ozawa, Toshio Sone

    The Journal of the Acoustical Society of Japan　60　(7)　351-357　2004

    DOI： 10.20697/jasj.60.7_351 　

  215. The effects of linearly moving sound images on self-motion perception Peer-reviewed

    Shuichi Sakamoto, Yusuke Osada, Yôiti Suzuki, Jiro Gyoba

    Acoustical Science and Technology　25　(1)　100-102　2004/01

    DOI： 10.1250/ast.25.100 　

    ISSN： 1346-3969

  216. A psychophysical investigation of self-motion perception produced by acoustic information Peer-reviewed

    Shuichi Sakamoto, Yusuke Osada, YÔiti Suzuki, Jiro Gyoba

    Proc. of China-Japan Joint Conference on Acoustics (JCA2002)　243-246　2002/11/14

  217. 補聴器両耳装用効果に関する検討(第1報)

    高卓 輝, 高坂 知節, 入間田 美保子, 河本 和友, 坂本 修一, 鈴木 陽一

    Audiology Japan　45　(5)　467-468　2002/09/30

    Publisher: Japan Audiological Society

    DOI： 10.4295/audiology.45.467 　

    ISSN： 0303-8106

  218. Speech intelligibility test by new Japanese word-lists Peer-reviewed

    Shuichi Sakamoto, Yo-iti Suzuki, Shigeaki Amano, Tadahisa Kondo

    17th International Congress on Acoustics　5D.15.06　1-2　2001/09

  219. Speech intelligibility by use of new word-lists with controlled word familiarities and a phonetic balance Peer-reviewed

    Shuichi Sakamoto, Yo-iti Suzuki, Shigeaki Amano, Tadahisa Kondo

    8th International Congress on Sound and Vibration　2461-2466　2001/07

  220. Clinical evaluation of a portable digital hearing aid with narrow-band loudness compensation Peer-reviewed

    H Hidaka, T Kawase, S Takahashi, Y Suzuki, K Ozawa, S Sakamoto, N Sasaki, K Hirano, N Ueda, T Sone, T Takasaka

    SCANDINAVIAN AUDIOLOGY　27　(4)　225-236　1998

    DOI： 10.1080/010503998420531 　

    ISSN： 0105-0397

  221. New lists for word intelligibility test based on word familiarity and phonetic balance Peer-reviewed

    SAKAMOTO Shuichi, SUZUKI Yo-iti, AMANO Shigeaki, OZAWA Kenji, KONDO Tadahisa, SONE Toshio

    The Journal of the Acoustical Society of Japan　54　(12)　842-849　1998

    DOI： 10.20697/jasj.54.12_842 　

    ISSN： 0369-4232

Show all ︎Show first 5

Misc. 133

  1. The Effect of Pointing Movements on Visual and Auditory Spatial Attention.

    LI Zhan, 坂本修一, 塩入諭, 塩入諭

    日本音響学会研究発表会講演論文集(CD-ROM)　2024　2024

    ISSN： 1880-7658

  2. 視覚および聴覚空間注意に対する指さし運動の影響

    李戦, 李戦, 坂本修一, 坂本修一, 塩入諭

    Vision　36　(4)　2024

    ISSN： 0917-1142

  3. Influence of Pointing Movements on Audiovisual Spatial Attention as Measured by Steady-State Evoked Potentials

    LI Zhan, 坂本修一, 塩入諭

    電子情報通信学会技術研究報告(Web)　124　(309(HIP2024 51-65))　2024

    ISSN： 2432-6380

  4. An Investigation of appearance ratio and imagery properties of aphantasia

    高橋純一, 齋藤五大, 大村一史, 安永大地, 杉村伸一郎, 坂本修一, 堀川友慈, 行場次朗

    電子情報通信学会技術研究報告(Web)　122　(326(HIP2022 58-74))　2022

    ISSN： 2432-6380

  5. バーチャル音空間の評価法 Invited

    坂本修一

    騒音制御　44　(4)　177-180　2020/08

  6. Head movement and sound localization

    76　(1)　61-67　2020/01

    Publisher: 日本音響学会

    ISSN： 0369-4232

  7. 脳波を用いた視聴覚注意の空間分布測定

    小野真, 坂本修一, 寺岡 諒, 佐藤好幸, 羽鳥康裕, 曽 加蕙, 栗木一郎, 塩入 諭

    信学技報　119　(348)　25-30　2019/12

  8. Auditory spatial and temporal attention affects word intelligibility in the presence of multiple speech sounds

    118　(190)　153-156　2018/08/23

    Publisher: 電子情報通信学会

    ISSN： 0913-5685

  9. Auditory spatial and temporal attention affects word intelligibility in the presence of multiple speech sounds

    48　(6)　611-614　2018/08/23

    Publisher: 日本音響学会

    ISSN： 1346-1109

  10. 超高臨場感空間音響技術の最新動向と将来展望 Invited

    鈴木陽一, トレビーニョ ホルヘ, 坂本修一

    電子情報通信学会誌　101　(8)　786-792　2018/08

  11. Auditory spatial attention affects word intelligibility in noisy environment (音声)

    寺岡 諒, 坂本 修一, 崔 正烈, 鈴木 陽一, 塩入 諭

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報　117　(393)　73-77　2018/01/20

    Publisher: 電子情報通信学会

    ISSN： 0913-5685

  12. Auditory spatial attention affects word intelligibility in noisy environment

    48　(1)　73-77　2018/01/20

    Publisher: 日本音響学会

    ISSN： 1346-1109

  13. Optimization of Outdoor Loudspeaker Level Based on U50 for Disaster Prevention Administrative Radio

    西村竜一, 坂本修一, 苣木禎史, CUI Zhenglie

    電子情報通信学会技術研究報告　117　(516(SIP2017 111-184))　2018

    ISSN： 0913-5685

  14. Design and implementation of resilient node networks for outdoor loudspeaker system

    上田祐己, 苣木禎史, 坂本修一, 西村竜一, CUI Zhenglie

    電子情報通信学会技術研究報告　117　(516(SIP2017 111-184))　2018

    ISSN： 0913-5685

  15. An efficient spatial sound rendering method for extended reality applications (応用音響)

    TREVINO Jorge, SAKAMOTO Shuichi, SUZUKI Yoiti

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報　117　(328)　127-132　2017/11/30

    Publisher: 電子情報通信学会

    ISSN： 0913-5685

  16. Enhancing the binaural synthesis from spherical microphone array recordings by using virtual microphones (応用音響)

    SALVADOR Cesar, SAKAMOTO Shuichi, TREVINO Jorge, SUZUKI Yoiti

    電子情報通信学会技術研究報告 = IEICE technical report : 信学技報　117　(328)　61-66　2017/11/30

    Publisher: 電子情報通信学会

    ISSN： 0913-5685

  17. Spectral cues in sound localization and timbre perception

    117　(255)　63-68　2017/10/21

    Publisher: 電子情報通信学会

    ISSN： 0913-5685

  18. Enhancing effect of body vibration generated from audio signal on perceived reality in multimodal content

    116　(501)　61-66　2017/03/06

    Publisher: 電子情報通信学会

    ISSN： 0913-5685

  19. Invited Lecture : Binaural synthesis of spherical microphone array recordings

    116　(501)　85-90　2017/03/06

    Publisher: 電子情報通信学会

    ISSN： 0913-5685

  20. Design theory for binaural synthesis: Combining microphone array recordings and head-related transfer function datasets Invited Peer-reviewed

    Salvador César D., Sakamoto Shuichi, Treviño Jorge, Suzuki Yôichi

    THE JOURNAL OF THE ACOUSTICAL SOCIETY OF JAPAN　73　(3)　189-196　2017/03

    Publisher: Acoustical Society of Japan

    DOI： 10.20697/jasj.73.3_189 　

    ISSN： 0369-4232

  21. MEMS気圧センサを用いたインフラサウンド収音用マイクロフォンの試作

    齋藤雄二, 西村竜一, 坂本修一, 鈴木陽一

    電気関係学会東北支部連合大会講演論文集(CD-ROM)　2017　2017

  22. Evaluation of perceived reality by multimodal contents with generated vibration information

    116　(377)　25-28　2016/12/20

    Publisher: 電子情報通信学会

    ISSN： 0913-5685

  23. Evaluation of perceived reality by multimodal contents with generated vibration information

    40　(46)　25-28　2016/12

    Publisher: 映像情報メディア学会

    ISSN： 1342-6893

  24. Speech intelligibility under long-path echoes by using four-continuous-words simulating emergency mass-notification messages

    46　(6)　379-383　2016/08/09

    Publisher: 日本音響学会

    ISSN： 1346-1109

  25. Shared sound field reproduction over two regions including distance effects

    46　(6)　401-405　2016/08/09

    Publisher: 日本音響学会

    ISSN： 1346-1109

  26. Shared sound field reproduction over two regions including distance effects

    116　(179)　59-63　2016/08/09

    Publisher: 電子情報通信学会

    ISSN： 0913-5685

  27. Speech intelligibility under long-path echoes by using four-continuous-words simulating emergency mass-notification messages

    116　(179)　37-41　2016/08/09

    Publisher: 電子情報通信学会

    ISSN： 0913-5685

  28. Effects of applying a notch filter on timbre discrimination of broadband noise

    46　(2)　77-82　2016/03/04

    Publisher: 日本音響学会

    ISSN： 1346-1109

  29. The Effect of Vertical Vection on Vertical Sound Localization

    46　(1)　11-14　2016/02/20

    Publisher: 日本音響学会

    ISSN： 1346-1109

  30. 音環境感性実験室

    坂本修一, 鈴木陽一

    日本音響学会誌　72　(9)　566-567　2016

    DOI： 10.20697/jasj.72.9_566 　

  31. 超多チャネルマイクロホンアレイ

    坂本修一

    日本音響学会誌　72　(9)　594-595　2016

    DOI： 10.20697/jasj.72.9_594 　

  32. Auditory space perception during horizontal motion

    45　(8)　653-657　2015/11/13

    Publisher: 日本音響学会

    ISSN： 1346-1109

  33. 遅い頭部回転中の音像定位における主観的正面の検知限

    角掛沙也香, 角掛沙也香, 本多明生, 鈴木陽一, 鈴木陽一, 坂本修一, 坂本修一

    日本音響学会聴覚研究会資料　45　(8)　649‐652　2015/11/07

    ISSN： 1346-1109

  34. 聴性誘発脳磁界に観察されるlip-reading効果の「時間窓」

    川瀬 哲明, 八幡 湖, 高梨 芳崇, 坂本 修一, 中里 信和, 香取 幸夫

    Audiology Japan　58　(5)　501-502　2015/09

    Publisher: (一社)日本聴覚医学会

    ISSN： 0303-8106

    eISSN： 1883-7301

  35. Development of High-definition 3D Auditory Displays Based on Active Listening Principle

    115　(188)　1-4　2015/08/24

    Publisher: 電子情報通信学会

    ISSN： 0913-5685

  36. 視聴覚統合処理における脳磁場解析

    八幡 湖, 川瀬 哲明, 坂本 修一, 中里 信和, 香取 幸夫

    音声言語医学　56　(1)　99-99　2015/01

    Publisher: 日本音声言語医学会

    ISSN： 0030-2813

    eISSN： 1884-3646

  37. Influence of talker's movie of irrelevant speech utterance on serial recall task

    TORAI Shun, OHTANI Tomoko, SAKAMOTO Shuichi, SUZUKI Yoiti

    Technical report of IEICE. HIP　114　(347)　47-50　2014/12/01

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    When listening to speech, speech intelligibility can be improved by obtaining information such as phoneme information by seeing talker's movie. On the other hand, in serial recall tasks of digits presented visually, phenomenon that auditory information interfere with task performance is known as irrelevant speech effect. In this study, we investigated the effect of talker's movie that improve speech intelligibility on the serial recall task of auditory presented digits. To observe this effect, we compared difference of correct answer rate between only target sounds, adding the talker's movie speaking the same content as the target sounds and adding the talker's movie speaking the different content from target sounds. As a result, it did not show any significant effects on the correct answer rate in serial recall task whether or not the talker's movie corresponded to target sounds.

  38. Difference limens for sound localization of listeners at the subjective front during passive horizontal rotation

    MASUMI Yoji, HONDA Akio, SUZUKI Yoiti, SAKAMOTO Shuichi

    Technical report of IEICE. HIP　114　(347)　7-10　2014/12/01

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    In this study, we examined difference limens for sound localization at subjective front during passive rotation by using a spinning chair. A sound stimulus (30-ms pinknoise) was presented during the chair rotated. The listener, sitting in the chair, was requested to answer whether the sound stimulus was presented from the left or right of the subjective front (2AFC). Results showed that difference limens of passive rotation conditions were larger than that of head static condition regardless of rotation speeds used in the experiment (5-20 deg/s). This tendency is same as that in our previous research that examined difference limens during active head rotation.

  39. Influence of talker's movie of irrelevant speech utterance on serial recall task

    TORAI Shun, OHTANI Tomoko, SAKAMOTO Shuichi, SUZUKI Yoiti

    IEICE technical report. Speech　114　(272)　59-63　2014/10/23

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    In serial recall tasks of digits presented visually, phenomenon that auditory information interfere with task performance is known as irrelevant speech effect. On the other hand, as McGurk effect, there are cases where the talker's movie transform the perception of speech. Accordingly, in the serial recall task are presented auditory, irrelevant visual information may interfere with performance. In this study, we investigated the effect of talker's movie content different from the auditory information to be recalled on the serial recall task of auditory presented digits. As a result, it was not suggested that the talker's movie speaking content that is different from the target sounds affects the correct answer rate in the serial recall task.

  40. 視覚情報提示による聴覚誘発磁界の変化

    八幡 湖, 川瀬 哲明, 坂本 修一, 中里 信和, 香取 幸夫

    Audiology Japan　57　(5)　537-538　2014/10

    Publisher: (一社)日本聴覚医学会

    ISSN： 0303-8106

    eISSN： 1883-7301

  41. Effects of inter-word pauses on word intelligibility under long-path echo condition

    MIYASHITA Tomori, CUI Zhenglie, SAKAMOTO Shuichi, MORIMOTO Masayuki, SUZUKI Yoiti

    Technical report of IEICE. EA　114　(178)　55-58　2014/08/19

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    When speech sound is presented via open-air public address system, the speech intelligibility is often degraded because of the effect of long-path echoes. To cope with this, we are focusing on the effect of pause insertion between words consisting of the speech signals. In this study, word intelligibility test using groups of four words was examined under various pause insertion patterns and long-path echo conditions. A quantitative analysis of effects of these two parameters on the intelligibility was carried out. The results indicated that the intelligibility is significantly improved by inserting pauses between words. This suggests that speech signals with adequate pause would resut in robust speech communication even in the presence of long-path echoes.

  42. Spatially Oriented Format for Acoustics (SOFA) for Exchange Data of Head-related Transfer Functions

    Iwaya Yukio, Watanabe Kanji, Majdak Piotr, Noisternig Markus, Suzuki Yoiti, Sakamoto Shuichi, Takane Shouichi, Sato Soujun

    Technical report of IEICE. EA　114　(112)　19-23　2014/06/27

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    Head-related transfer functions (HRTFs) and directional room impulse responses (DRIRs) enable to render/synthesize spatial acoustic information. These functions include, on the one hand, the auditory cues for spatial perception and, on the other hand, the acoustic characteristics of a space. Many research groups/institutes have measured HRTF/DRIR data and stored them using different data formats. The measurement setups typically differ among measurements, e.g. the excitation signal, the spatial sampling grid, the coordinate system, the source distance, and the room conditions. This makes it difficult to use the data provided by different institutes in a unified way. The spatially oriented format for acoustics (SOFA) aims at representing HRTFs/DRIRs in a general and self-contained way. The SOFA standard has been confirmed by Audio Engineering Society (AES) and will be published soon. This report describes the idea of SOFA and its details.

  43. マルチモーダル音空間知覚過程から災害対応技術まで－音空間情報学に関する最近の研究成果から－

    鈴木 陽一, 坂本 修一

    研究報告音楽情報科学（MUS）　2014　(5)　1-2　2014/05/17

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    音 （聴覚） 情報は他の感覚情報，とりわけ映像 （視覚） 情報と密接に影響を及ぼしあう。この事実と，映像技術の高度化が進んでいることを考えると，音空間に関する音響技術はそれに先行する形で更に進化と深化を進めていくことが必要である。我々は，このような技術の高度化にあたり，人間の情報処理過程を理解し，その特性を充分に考慮して行うことが必要であると考えている。本講演では，このような視座に基づいて我々が展開している，音空間に関するマルチモーダル知覚過程と，臨場感に代表される高次感性情報の規程因，3 次元音空間情報の高精細取得・再生技術，屋外拡声システムの情報伝達性能の高度化に関する最近の研究成果を紹介する。Hearing information closely interact with information from other senses, particularly visual information. Therefore, sound technologies treating its spatial aspects should advance along with the rapid advancement of vision technologies even to lead such vision technologies. We believe that such sound technologies should be developed based on good knowledge of human information processing. In this lecture, some of our recent research results on human multimodal perception relating to sound space, factors determining affectivity for sound space such as sense-of-presence, and high definition technologies to sense and reproduce three-dimensional sound space information. Moreover, after the Great East-Japan Earthquake, we have been also putting a lot of efforts to advance open-air public address systems to convey critical information of severe disasters.

  44. From multimodal spatial hearing to engineering applications to cope with severe disasters : Our recent research results on spatial acoustic information sciences

    SUZUKI Yoiti, SAKAMOTO Shuichi

    IEICE technical report. Speech　114　(52)　19-20　2014/05/17

    Publisher: The Institute of Electronics, Information and Communication Engineers

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    Hearing information closely interact with information from other senses, particularly visual information. Therefore, sound technologies treating its spatial aspects should advance along with the rapid advancement of vision technologies even to lead such vision technologies. We believe that such sound technologies should be developed based on good knowledge of human information processing. In this lecture, some of our recent research results on human multimodal perception relating to sound space, factors determining affectivity for sound space such as sense-of-presence, and high definition technologies to sense and reproduce three-dimensional sound space information. Moreover, after the Great East-Japan Earthquake, we have been also putting a lot of efforts to advance open-air public address systems to convey critical information of severe disasters.

  45. Editing distance information in compact microphone array recordings for its binaural rendering

    SALVADOR Cesar, SAKAMOTO Shuichi, TREVINO Jorge, SUZUKI Yoiti

    Technical report of IEICE. EA　114　(3)　13-18　2014/04/17

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    Spatial sound information can be recorded using spherical microphone arrays. Realistic binaural renderings of such recordings require the head-related transfer functions (HRTFs), characterized from thousands of surrounding positions to both ears. We propose a 3D audio processing method to make sounds appear closer or farther than their original distance. HRTFs for only some surrounding positions at a fixed distance are required. Binaural signals are synthesized from samplings of the sound pressure field on a rigid spherical surface. The directional structure of both the sound pressure field and the HRTFs are encoded using spherical harmonics. Distance manipulations rely on the use of the spherical Hankel functions.

  46. SENZI：球状マイクロホンアレイを用いた3次元音空間収音再生

    坂本修一

    日本音響学会誌　70　(7)　379-384　2014

    Publisher: The Acoustical Society of Japan (ASJ)

    DOI： 10.20697/jasj.70.7_379 　

    ISSN： 0369-4232

  47. Analysis of contribution of a speaker on a monitor screen in the speech intelligibility test by phoneme using meaningless try-syllable

    HASEGAWA Gen, SAKAMOTO Shuichi, ABE Toru, OHTANI Tomoko, SUZUKI Yoiti, KAWASE Tetsuaki

    Technical report of IEICE. HIP　113　(299)　1-6　2013/11/19

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    This study focuses on which detailed parts around the speaker's mouse contribute speech intelligibility. To examine this, nonsense tri-syllables speeches were combined with several kinds of speaker's video including the original face and those with and without the mouse to measure audio-visual speech intelligibility. The results showed that intelligibility scores of several phonemes (/n/, /h/, /m/, /w/, /d/, /b/, /p/) were increased by adding visual information. However, there was no significant difference between the score with original speaker's face video and that obtained by the stimuli with only mouse part. It suggests that only the mouse provides sufficient information for speech intelligibility. Moreover, no significance was also observed between the original audio-visual stimuli and those with speakers face without the mouse. It suggests that the visual information around mouse also provide important information for speech intelligibility.

  48. The Suppression Effect of Unconscious Head Movements by Utilizing Visual Feedback System

    NAKAI Akihito, YAIRI Satoshi, SUZUKI Yoiti, HONGO Satoshi, SAKAMOTO Shuichi

    Technical report of IEICE. HIP　113　(299)　79-84　2013/11/19

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    Head-Related Transfer Functions (HRTF) characterize sound propagation between a sound in a free field source and the listener's ears. Since HRTFs are strongly dependent on the listeners ' anthropometric features, such as the shape of their pinnae, measurement for each subject is required. Moreover, as HRTF are functions of the relative positions of the sound sources and the listener's ears, the measurement requires the subject to remain still, maintaining a constant posture for a 40-minutes long while the measurements take place inside a sound proof room. This must be tiring, making it hard for the subjects to concentrate this task. This task can be easier by providing the subjects with a spatial reference to counter their movements. In this paper, a visual feedback system to notify the subjects of their head movements is proposed. The results show the visual feedback to help the subjects remain at the specified position during a 40-minutes long experiment.

  49. 体躯と顔の向きの差が主観的正面における音像定位弁別限に与える影響

    増見洋治, 鈴木陽一, 本多明生, 坂本修一

    日本音響学会聴覚研究会資料　43　(7)　559-563　2013/10/04

    ISSN： 1346-1109

  50. Intensity and temporal characteristics of vibration information responsible for the perceived reality in multi-modal contents

    18　92-95　2013/09/18

    Publisher: [日本バーチャルリアリティ学会]

    ISSN： 1349-5062

  51. RJ-004 The effect of rotationally moving sound on the circular vection

    Cui Zhenglie, Yagyu Hiroyuki, Sakamoto Shuichi, Iwaya Yukio, Suzuki Yoiti

    12　(3)　33-38　2013/08/20

    Publisher: Forum on Information Technology

  52. Speech intelligibility of familiarity-controlled four-continuous-words under long-path echoes

    TORAI Shun, CUI Zhenglie, SAKAMOTO Shuichi, SATO Hayato, MORIMOTO Masayuki, SUZUKI Yoiti

    Technical report of IEICE. EA　113　(177)　7-11　2013/08/09

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    This study seeks to lay the basis for a vocabulary selection guideline suitable for outdoors public address systems. For this, an intelligibility test using groups of four words and featuring long pass echoes was conducted. The word familiarity used, as well as the number of echoes and their pattern was controlled throughout the experiment. A quantitative analysis of the effects of these three parameters on the intelligibility of the word groups was carried out. It was found that using high-familiarity words allows for robust speech communication even in the presence of long pass echoes.

  53. Implementation of a 3D auditory display with stereo-vision head tracking

    ITO Atsuro, SUZUKI Yoiti, SAKAI Shuji, ITO Koichi, OHUCHI Makoto, SAKAMOTO Shuichi, AOKI Takafumi, IWAYA Yukio

    Technical report of IEICE. EA　113　(177)　35-38　2013/08/09

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    Virtual 3D Auditory Displays (VADs), systems capable of presenting rich 3D auditory space information, have received signifcant attention. Our interest focuses on VADs that re-create the sound pressures at the listener's ears using head-related transfer functions (HRTFs). Here, HRTFs should match the listener's head movement for a natural listening experience, requiring head tracking. Available solutions, however, call for sensors attached to the listener; a requirement we seek to overcome. We developed a new head tracking system based on stereo cameras using phase-only correlation and particle filtering. The proposed head tracking system was coupled with a VAD middleware called SiFASo.

  54. Perceptual evaluation of sign signals with long-distance propagation

    CUI Zhenglie, MASUMI Yoji, IWAYA Yukio, SAKAMOTO Shuichi, SAITO Fumitaka, SUZUKI Y^oiti

    Technical report of IEICE. EA　113　(134)　27-32　2013/07/18

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    We developed a signal sound which could robustly inform citizens of disaster information even if speech signal is hardly intelligible because of long-path echoes and intense background noise. To do this research, we examined various factors required to develop such a signal sound under actual out-door conditions as well as laboratory (in-door) conditions with long-path echoes by use of multidimensional psychophysical evaluation for several candidate signal sounds as well as some other alarm signal sounds.

  55. Evaluation of speech intelligibility and development of sign signal sound for outdoor public address (PA) systems : Development of technologies for improving outdoor sound transmission systems to address disaster information

    CUI Zhenglie, MORIMOTO Masayuki, SATO Hayato, SAKAMOTO Shuichi, IWAYA Yukio, SAITO Fumitaka, SUZUKI Yoiti

    IEICE technical report. Speech　113　(76)　83-88　2013/06/13

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    This research aimed to improving the performance of the municipal disaster management radio systems. Concretely, speech intelligibility tests were performed at outdoor and indoor conditions to investigate the effect of long-path echoes to speech understanding. Also, examined the methods possible to robustly convey disaster information even if the speech sound is presented at long-path echo condition. Furthermore, examined various factors required to develop the signal sound for transmitting information at long-path echo condition and have chosen a few good candidate sign sounds.

  56. 頭部運動中の主観的正面における音像定位弁別限

    大場景翔, 鈴木陽一, 坂本修一, 本多明生, 岩谷幸雄

    日本音響学会研究発表会講演論文集(CD-ROM)　2013　ROMBUNNO.3-8-3　2013/03/05

    ISSN： 1880-7658

  57. Difference of the auditory space perception between walking and passive self-motion

    43　(2)　117-120　2013/03/02

    Publisher: 日本音響学会

    ISSN： 1346-1109

  58. Distortion of auditory space during linear vection

    W. Teramoto, Z. Cui, K. Moishi, S. Sakamoto, Y-I Suzuki, J. Gyoba

    PERCEPTION　42　169-169　2013

    ISSN： 0301-0066

    eISSN： 1468-4233

  59. Auditory space perception during active control of self-motion

    42　(7)　565-568　2012/10/13

    Publisher: 日本音響学会

    ISSN： 1346-1109

  60. 頭部運動中の音像定位弁別限に関する実験的考察

    大場景翔, 本多明生, 岩谷幸雄, 鈴木陽一, 坂本修一

    日本音響学会聴覚研究会資料　42　(7)　543-546　2012/10/05

    ISSN： 1346-1109

  61. The Effect of Forward Vection on Sound Localization

    17　507-510　2012/09/12

    Publisher: 日本バーチャルリアリティ学会

    ISSN： 1349-5062

  62. 身体振動情報が多感覚コンテンツの高次感性知覚に与える影響

    長谷川玄, 坂本修一, 本多明生, 岩谷幸雄, 鈴木陽一, 行場次朗

    日本バーチャルリアリティ学会大会論文集(CD-ROM)　17　284-287　2012/09/12

    Publisher: 日本バーチャルリアリティ学会

    ISSN： 1349-5062

  63. Improvement of the accuracy of 3D sound space synthesized by 252ch real-time processing of SENZI sound space information acquisition system

    42　(6)　477-482　2012/08/01

    Publisher: 日本音響学会聴覚研究委員会

    ISSN： 1346-1109

  64. Improvement of the accuracy of 3D sound space synthesized by 252ch real-time processing of SENZI sound space information acquisition system

    SAKAMOTO Shuichi, MATSUNAGA Jumpei, HONGO Satoshi, OKAMOTO Takuma, IWAYA Yukio, SUZUKI Yoiti

    Technical report of IEICE. EA　112　(171)　7-12　2012/07/25

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    This report introduces detailed specifications of real-time SENZI (Symmetrical object with ENchased Zillion microphones). We have designed and equipped a SENZI system with 252 ch microphones. The analysis of the accuracy of synthesized 3D sound-space information with this system shows that the SNR of microphones affects to the accuracy of synthesized sound-space information, especially under low frequency region. To solve this problem, we used condition numbers as an index to synthesize accurate sound-space information in the low frequency region.

  65. What is "reality" in virtual reality?

    TERAMOTO Wataru, YOSHIDA Kazuhiro, ASAI Nobuko, HIDAKA Souta, GYOBA Jiro, SAKAMOTO Shuichi, IWAYA Yukio, SUZUKI Yoiti

    ITE Technical Report　36　(12)　37-44　2012/02/27

    Publisher: The Institute of Image Information and Television Engineers

    DOI： 10.11485/itetr.36.12.0_37 　

    ISSN： 1342-6893

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    Recent advancement of information and communication technologies has evoked expectations for more natural and realistic communications. To this end, the enhancement of a sense of presence-subjective experience of being in one place even when one is physically situated in another-has been the most important issue. In the present study we first discuss the essence of sense of presence based on our recent survey of more than 200 non-researchers. Next, we show spatio-temporal characteristics for vraisemblance, which is the reality or virtuality assumed to link essentially to foreground components in a scene, while contrasting it with the sense of presence, which, theoretically and empirically, has been found to relate dominantly to background components contained in a scene. Lastly we introduce most recent research on a sense of being together, which is assumed to be one of the essential issues in communication with other persons in a virtual environment.

  66. Sound Localization in the Perception of Self-Motion : The Effect of Spatial Frames of Reference

    42　(1)　5-10　2012/02/04

    Publisher: 日本音響学会聴覚研究委員会

    ISSN： 1346-1109

  67. Compression of auditory space representation during uniformly-accelerated self-motion

    42　(1)　11-16　2012/02/04

    Publisher: 日本音響学会聴覚研究委員会

    ISSN： 1346-1109

  68. 視聴者が感じるスポーツコンテンツの臨場感と迫真性は再生速度によって変化する

    本多明生, 神田敬幸, 柴田寛, 坂本修一, 岩谷幸雄, 行場次朗, 鈴木陽一

    日本バーチャルリアリティ学会大会論文集(CD-ROM)　17th　2012

    ISSN： 1349-5062

  69. Perceived direction of self-motion from real somatic motion and orthogonally directed visual stimulation for supine observers

    SAKURAI Kenzo, KUBODERA Toshio, GROVE Philip M., SAKAMOTO Shuichi, SUZUKI Yoiti

    ITE Technical Report　35　(51)　1-4　2011/12/02

    Publisher: The Institute of Image Information and Television Engineers

    ISSN： 1342-6893

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    Previously, we reported that upright observers, experiencing real leftward/rightward or forward/backward body motion while viewing orthogonal translating or expanding/contracting optic-flow, perceived self-motion directions intermediate to those specified by visual and vestibular information (Sakurai et al, 2010, Journal of Vision, 10(7): 866). Here we investigate conditions in which observers lay supinely, experiencing real upward/downward or leftward/rightward motion in body coordinates, while viewing orthogonal optic-flow patterns, phase-locked to the swing motion. Optic-flow patterns consisted of leftward/rightward or upward/downward translational or expanding/contracting oscillatory optic-flow. Observers were cued with a sound to indicate their perceived direction of self-motion, via a rod-pointing task. When upward/downward or leftward/rightward body motion was combined with visual leftward/rightward or upward/downward optic-flow, most observers' direction judgments progressively favored the direction specified by vision with increasing amplitude of optic-flow, as in our previous reports, suggesting a weighted combination of visual and vestibular cues in this context. For combinations of body motion with visual expanding/contracting optic-flow, some observers' judgments were vision-only or vestibular-only, suggesting that multimodal integration in this context is an either-or process for these observers. Compared to our previous reports, one possible reason for this weighted combination failure is the discrepancy between body coordinates and gravity coordinates.

  70. An experimental study of presence and verisimilitude on audio-visual contents : Effects of restricted visual fields and sound pressure levels on video scenes of cymbal performance

    KANDA Takayuki, HONDA Akio, SHIBATA Hiroshi, ASAI Nobuko, TERAMOTO Wataru, SAKAMOTO Shuichi, IWAYA Yukio, GYOBA Jiro, SUZUKI Yoiti

    Technical report of IEICE. HIP　111　(283)　7-10　2011/11/03

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    Several previous studies revealed that the sense of presence is typically improved by increasing sound pressure level or field size of view on audio-visual contents. Recently, Teramoto et al. (2010) focused on a new evaluation index which was called the sense of verisimilitude, and they reported that effects of sound pressure level and field size of view were different between the sense of presence and the sense of verisimilitude. In the present study, we conducted an experiment using an familiar audio-visual content in daily life, namely, a clip of western orchestral music.

  71. 視聴覚コンテンツにおける臨場感・迫真性の規定因

    神田敬幸, 本多明生, 柴田寛, 浅井暢子, 寺本渉, 坂本修一, 岩谷幸雄, 行場次朗, 鈴木陽一

    日本バーチャルリアリティ学会大会論文集(CD-ROM)　16th　ROMBUNNO.22E-4　2011/09/20

    ISSN： 1349-5062

  72. 聴覚再建医療の聴取能改善に関する研究 (1)脳幹インプラントのプレサイスロケーション (2)聴覚-視覚相互作用と聴覚リハビリテーション (3)聴性誘発脳磁界による蝸牛神経機能の評価

    川瀬 哲明, 織田 潔, 堀 容子, 高田 雄介, 坂本 修一, 菅野 彰剛, 中里 信和, 鈴木 陽一, 小林 俊光

    ナノ医工学年報　4　(1)　131-139　2011/03

    Publisher: 東北大学グローバルCOEプログラム「新世紀世界の成長焦点に築くナノ医工学拠点」

    ISSN： 1882-4692

  73. Distortions of auditory space during uniformly-accelerated self-motion

    40　(8)　689-692　2010/10/16

    Publisher: 日本音響学会聴覚研究委員会

    ISSN： 1346-1109

  74. A crossmodal contingent aftereffect between visual and vestibular senses

    SAKURAI Kenzo, SUZUKI Yuika, SAKAMOTO Shuichi, GYOBA Jiro, SUZUKI Yoiti

    IEICE technical report　110　(228)　11-14　2010/10/07

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    We conducted an experiment to explore color-contingent self-motion aftereffects. Observers were asked to report whether the color-contingent self-motion aftereffect occurred when they observed static spiral test patterns on a red or a green background after they adapted to a red (green) screen with moving their bodies forward (backward). Results showed neither consistent contingency between red/green screen and expansion/contraction nor color-contingent self-motion aftereffect. Further studies are needed to test the possibility of the crossmodal contingent motion aftereffect between visual and vestibular senses.

  75. A crossmodal contingent aftereffect between visual and vestibular senses

    ITE technical report　34　(40)　11-14　2010/10

    Publisher: 映像情報メディア学会

    ISSN： 1342-6893

  76. J-017 Effects of auditory information on travel distance estimation

    Furune Fumimasa, Sakamoto Shuichi, Teramoto Wataru, Gyoba Jiro, Suzuki Yoiti

    9　(3)　503-504　2010/08/20

    Publisher: Forum on Information Technology

  77. Implementation of a spherical 121-microphone array for recording sound field based on higher order Ambisonics

    40　(7)　551-556　2010/08/09

    Publisher: 日本音響学会聴覚研究委員会

    ISSN： 1346-1109

  78. 252ch等密度球状アレイを用いた3次元音場情報取得システム—3D sound space information recording system using 252ch isopycnic and spherical microphone array

    坂本 修一, 小玉 純一, 本郷 哲

    聴覚研究会資料 = Proceedings of the auditory research meeting　40　(7)　569-573　2010/08

    Publisher: 日本音響学会聴覚研究委員会

    ISSN： 1346-1109

  79. Effects of the alternation of sounds on the perceived direction of visual motion

    W. Teramoto, S. Hidaka, Y. Sugita, S. Sakamoto, J. Gyoba, Y. Iwaya, Y. Suzuki

    PERCEPTION　39　143-143　2010

    ISSN： 0301-0066

  80. 高次アンビソニックス型音場収録のための121ch球状マイクロホンアレイの構築

    岡本拓磨, 岩谷幸雄, 坂本修一, 鈴木陽一

    信学技報　2010

  81. 腹話術効果の時間特性

    小林まおり, 藤井真治, 岩谷幸雄, 坂本修一, 鈴木陽一

    日本バーチャルリアリティ学会論文誌掲載決定　15　(3)　483-486　2010

  82. Analyses of Understandings of Sense of Presence based on Educational Backgrounds

    YOSHIDA Kazuhiro, TERAMOTO Wataru, ASAI Nobuko, HIDAKA Souta, SAKAMOTO Shuichi, GYOBA Jiro, SUZUKI Yoiti

    Technical report of IEICE. HIP　109　(345)　91-96　2009/12/10

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    We investigated shared understandings of sense of presence among students in science and engineering courses. The studens tended to use the term, "sense of presence", not only to refer to an experience of being there in a mediated environment, but also refer to an experience which makes them excited or strained in an actual environment. The students estimated that the visual, auditory, vestibular and kinesthetic senses were closely related to sense of presence. Furthermore, a semantic differential method revealed four different elements of sense of presence-evaluation, impact/activity, stimulus structure and extraordinariness. The first two results (the diversity of the meaning and the sensory modality selectivity of sense of presence) were consistent with those in our previous study which had investigated the understandings of sense of presence among students in arts and humanities courses. However, the factor structure of sense of presence was different between these two studies. This result suggests that educational backgrounds may affect the understandings of sense of presence.

  83. J-019 Effects of listener's self-motion and sound source movements on the perceptual changes of sound pressure level

    Furune Fumimasa, Sakamoto Shuichi, Teramoto Wataru, Gyoba Jiro, Sakurai Kenzo, Suzuki Yoiti

    8　(3)　425-426　2009/08/20

    Publisher: Forum on Information Technology

  84. The effect of arrangement of microphones on SENZI (Symmetrical object with ENchased ZIllion microphones) to the accuracy of reproduction sound space information

    KODAMA Jun'ichi, SAKAMOTO Shuichi, HONGO Satoshi, OKAMOTO Takuma, IWAYA Yukio, SUZUKI Yoiti

    IEICE technical report　109　(166)　1-6　2009/07/27

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    We have proposed a system to acquire 3D sound field information for communications systems that transmits accurate sound space information to a distant place using a head model with numerous microphones. In this report, we report the results of the investigation on the relationship between the accuracy of reproduction of sound space information and the arrangement of microphones on SENZI (Symmetrical object with ENchased ZIllion microphones). The results showed that it is necessary for improving the accuracy to narrow the interval of microphones and to narrow the targeted source direction when calculating the weight to multiply the input signal of microphones.

  85. Temporal Recalibration for Audio-Visual Speech Integration

    ASAKAWA Kaori, TANAKA Akihiro, IMAI Hisato, SAKAMOTO Shuichi, SUZUKI Yoiti

    IEICE technical report　108　(356)　131-135　2008/12/11

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    Previous studies have revealed a temporal window in which human observers perceive physically desynchronized auditory and visual signals as synchronous. This temporal window of auditory-visual integration is recalibrated after adaptation to a constant timing difference between auditory and visual signals in nonspeech. In this study, we investigated whether this temporal recalibration occurs in speech. Participants observed monosyllabic audio-visual speech stimuli which had constant timing difference, and then performed the temporal order judgment. We varied the duration of adaptation to reveal whether it affects the temporal recalibration or not. The results suggested that the temporal recalibration for speech occurred and might be affected by the duration of adaptation and the context preceding each judgement.

  86. Effects of frequency-changed and amplitude-changed sounds on the perceived self-motion induced by vestibular information

    SAKAMOTO SHUICHI, SETO MIKIO, KOBAYASHI MAORI, IWAYA YUKIO, SAKURAI KENZO, GYOBA JIRO, SUZUKI YOICHI

    電子情報通信学会技術研究報告　108　(356(HIP2008 123-148))　19-23　2008/12/11

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    In this report, we examined whether frequency-changed and amplitude-changed sounds affect the perceived magnitude of backward-forward self-motion. Vestibular stimulus was presented by swing-like device. As the auditory stimulus, one-octave band-pass noise was presented. The amount of change accorded with the acceleration of motion. As the results of the experiments, the perceived magnitude of self-motion with changed sounds was significantly larger than that with the reference. The results suggest that auditory-vestibular integration does not depends on the characteristics of type of change of its auditory stimulus.

  87. Evaluations of TS-BASE for Speech Enhancement and Binaural Benefits Preservation

    LI Junfeng, SAKAMOTO Shuichi, HONGO Satoshi, AKAGI Masato, SUZUKI Yoiti

    IEICE technical report　108　(255)　85-90　2008/10/16

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    Hearing aids are expected to help hearing-impaired persons to understand speech especially in noisy environments, which is realized by enhancing the target signal of interest and by the selective binaural hearing processing in human's auditory system. Therefore, an effective system for hearing aids must possess two crucial functions: speech enhancement and binaural benefit preservation. In our previous work, we proposed a two-stage binaural speech enhancement (TS-BASE) approach for hearing aids, in which the interfering signal is estimated by cancelling the target signal through an adaptive filter in the first stage and a time-variant speech enhancer in the second stage. Its effectiveness was confirmed through some simple experiments. To comprehensively evaluate the performance of TS-BASE, in this paper, comprehensive experiments are conducted in various acoustic environments and the evaluations on speech enhancement and binaural cue preservation are performed in terms of objective measures. We report the experimental results along with the general discussions on the TS-BASE performance.

  88. Evaluation of enhanced sound quality on selective binaural speech enhancement based on wavelet transform

    38　(5)　473-478　2008/08/04

    Publisher: 日本音響学会聴覚研究委員会

    ISSN： 1346-1109

  89. Crossmodal perception of self-motion from visual and vestibular information when body motion directions were varied

    KUBODERA Toshio, SAKAMOTO Shuichi, SUZUKI Yoiti, SAKURAI Kenzo

    IEICE technical report　108　(182)　47-50　2008/07/30

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    Visual and vestibular information are important in perceiving the direction of self-motion, and the directions of the information are consistent with each other in most cases. In this research, we measured the perceived direction of self-motion when participants' bodies were actually moved in various directions with observing forward/backward visual vection. When a static visual stimulus was presented as a control condition, the participants perceived the correct direction of their actual body motion. When expanding/contracting visual stimuli were presented as experimental conditions, the visual information affected the perceived direction of self-motion. The results suggest that the cross-modal integration is exclusive when the direction difference from visual and vestibular information is large, but the integration is cooperative when the difference is small.

  90. Evaluation of Enhanced Sound Quality on Selective Binaural Speech Enhancement Based on Wavelet Transform

    SATO Wataru, HONGO Satoshi, SAKAMOTO Shuichi, SUZUKI Yoiti

    IEICE technical report　108　(179)　1-6　2008/07/28

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    Binaural information may enhance speech in noisy environments. Most previous studies in this area have implemented signal processing in the time and frequency domains. In this report, a selective binaural speech enhancement based on wavelet transform was implemented and its optimum frame size was examined by a subjective evaluation. Additionally, effectiveness of enhanced speech quality by the proposed method were demonstrated due to subjective evaluation, Segmental SNR, and Log-spectral distance.

  91. Spoken word intelligibility of young and old adults with Familiarity-controlled Word lists 2007 (FW07)

    Tadahisa Kondo, Mutsuo Ijuin, Shigeaki Amano, Shuichi Sakamoto, Yoiti Suzuki

    INTERNATIONAL JOURNAL OF PSYCHOLOGY　43　(3-4)　319-319　2008/06

    ISSN： 0020-7594

  92. The effect of sequential grouping of tones on synchrony perception of auditory and audio-visual stimuli

    38　(3)　285-290　2008/05/23

    Publisher: 日本音響学会聴覚研究委員会

    ISSN： 1346-1109

  93. Development of Familiarity-controlled Word-lists (FW07)

    KONDO Tadahisa, AMANO Shigeaki, SAKAMOTO Shuichi, SUZUKI Yoiti

    IEICE technical report　107　(434)　43-48　2008/01/17

    Publisher: 一般社団法人電子情報通信学会

    ISSN： 0913-5685

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    Familiarity-controlled Word-lists 2007 (FW07) has been released. FW07 was developed for assessing hearing ability in daily life conditions. FW07 aims to be easier use in clinical examinations, such as fitting hearing aid. For this aim, we made two modifications to FW03. First, the number of word in each list was reduced from 50 to 20 to lessen subjects&#039; burden. Second, not only the phonemic distribution was balanced by the same way as FW03 but also the speech level of each word in the lists was adjusted by referring to the SRT (Speech Recognition Threshold) of each word. This aims at making the differences of mean intelligibility among word lists as small as possible in the same familiarity rank. The results from word intelligibility tests for FW03 and FW07 showed that smaller differences of the mean word intelligibility of the lists in FW07 than in FW03. This means that FW07 is useful for measuring word intelligibility in clinical situation and it provides us a better measure to assess the hearing ability in daily life easily and accurately.

  94. Clarification of the auditory-visual information processing mechanism for advancing communication systems

    D. Kang, K. Asakawa, R. Miyauchi, S. Sakamoto, Y. Iwaya, Y. Suzuki

    Proc. of The 1st Student Organizing International Mini-Conference on Information Electronics Systems　2008

  95. Detection/tolerance thresholds of audio-visual asynchrony between time-expanded speech and talker's moving face in spoken word recognition

    NUMAHATA Shun, SAKAMOTO Shuichi, TANAKA Akihiro, IMAI Atsushi, TAKAGI Tohru, SUZUKI Yo-iti

    IEICE technical report　107　(369)　55-60　2007/11/29

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    Speech-rate conversion techniques are useful to support speech recognition, especially for aged person. However, if only the speech-rate is converted, there arises asynchrony between the auditory and visual information. In this study, we investigated the effect of detection/tolerance thresholds of audio-visual asynchrony between time-expanded speech and talker's moving face in spoken word recognition. In the experiment, words were presented under following two conditions : (1) asynchrony by time-expanded speech and (2) simple timing shift. The results showed that detection/tolerance thresholds were greater in asynchrony condition than that in timing shift. Moreover the effect of these thresholds to word recognition decreased while shortening the length of word.

  96. Effects of frequency-modulated sounds corresponding to self-motion acceleration on the magnitude of self-motion perception

    SETO MIKIO, SAKAMOTO SHUICHI, KOBAYASHI MAORI, SAKURAI KENZO, GYOBA JIRO, SUZUKI YOICHI

    電子情報通信学会技術研究報告　107　(369(HIP2007 129-158))　153-158　2007/11/29

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    Self-motion perception is well known as a typical the multi-modal perceptual phenomenon. Recent studies showed that self-motion perception is evoked not only by visual information, but also by auditory information. However, most of these studies reported the relationship between auditory spatial information and self-motion. In this study, we focused on the effect of frequency shift induced by moving object on self-motion perception. Through the two experiments, we consider about the effects of frequency-shift sound and the effects of adaptation to audio-vestibular stimuli. As a result, when the frequency-shift sound simulating the Doppler effect was presented, the self-motion perception was overestimated. Moreover, when the same auditory stimulus as the adaptation was presented, the self-motion was underestimated, while the self-motion perception was overestimated when the stimulus containing a frequency shift opposite to the adaptation was presented.

  97. Two-Input Two-Output Speech Enhancement Using Adaptive Filter

    SASAKI Ai, SAKAMOTO Shuichi, HONGO Satoshi, LI Junfeng, SUZUKI Yoiti

    IEICE technical report　107　(316)　39-44　2007/11/08

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    Two-input two-output speech enhancement algorithm is expected to be effective for binaural communication system, since such a system is benefited from the noise reduction ability achieved by the signal processing technology as well as the use of the binaural processing of human auditory system. Roman et al. (2006) proposed a two-input one-output speech enhancement system by calculating a binary mask by using adaptive filter. In this report, we propose a two-input two-output speech enhancement system that calculates two input soft real-valued mask filters in place of the hard 0 and 1 binary mask. The results of a computer simulation show that our proposed system outperforms the traditional algorithm by Roman et al.

  98. Effects of FM sounds on cyclical backward-forward self-motion

    37　(8)　633-638　2007/10/19

    Publisher: 日本音響学会聴覚研究委員会

    ISSN： 1346-1109

  99. 周波数変換帯域雑音音声を用いた聴覚リハビリテーションに関する模擬的検討(2) : 視覚情報(発話顔画像)を提示した訓練の効果について

    堀 容子, 川瀬 哲明, 牧 敦子, 小林 俊光, 坂本 修一, 鈴木 陽一

    Audiology Japan　50　(5)　507-508　2007/09/05

    ISSN： 0303-8106

  100. Sound space information reproduction system by using microphone array

    37　(7)　521-526　2007/08/09

    Publisher: 日本音響学会聴覚研究委員会

    ISSN： 1346-1109

  101. Sound space information reproduction system by using microphone array

    SAKAMOTO Shuichi, HONGO Satoshi, KADOI Ryo, SUZUKI Yoiti

    IEICE technical report　107　(186)　13-18　2007/08/02

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    This research aims at constructing a system that transmits precise sound space information to a distant place based on a dummy-head recording. We use a symmetrical head model SENZI (Symmetrical object with ENchased ZIllion microphones) and a modified dummy-head ASURA (A Symmetrical and Universal Recording Array) having many microphones. To realize this system, we propose a calculation method to convert the Model-Related Transfer Functions into listener's Head-Related Transfer Functions (HRTF). Moreover, we investigate the effect of shape of these head models to accuracy of synthesized HRTFs and the relationship between number of microphone and accuracy of synthesized HRTFs.

  102. 一側難聴者への適用を考慮した骨伝導補聴器に関する基礎検討

    坂本 修一, 鈴木 陽一, 川瀬 哲明, 小林 俊光

    Audiology Japan　49　(5)　499-500　2006/09/05

    ISSN： 0303-8106

  103. Adaptive β-order Generalized Spectral Subtraction for Speech Enhancement

    LI Junfeng, SAKAMOTO Shuichi, HONGO Satoshi, AKAGI Masato, SUZUKI Yoiti

    IEICE technical report　106　(205)　1-6　2006/08/03

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    While spectral subtraction has widely been used for speech enhancement, the spectral order set in spectral subtraction is generally fixed to some constants, resulting in the performance limitation to a certain degree. In this paper, we first investigate the effect of the spectral order β on the performance of the generalized spectral subtraction that was derived previously [7]. We then propose an adaptive β-order generalized spectral subtraction in which the spectral order is adaptively updated according to the signal-to-noise ratio (SNR) in each critical band frame by frame. Experimental results in various noise conditions are finally presented to illustrate the effectiveness and superiority of the proposed method with regard to the traditional spectral subtraction methods.

  104. 2項 音響工学研究会(3節 工学研究会,第5章 国際会議・シンポジウム等)

    鈴木 陽一, 坂本 修一, 伊藤 彰則

    東北大学電気通信研究所研究活動報告　13　278-278　2006/01/01

  105. Effect of audio-visual asynchrony by speech-rate conversion on word recognition

    TSUMURA Komi, TANAKA Akihiro, SAKAMOTO Shuichi, SUZUKI Yo-iti

    IEICE technical report　105　(479)　103-108　2005/12/15

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    Speech-rate conversion techniques are useful for speech recognition, especially for aged person. However, if only the speech-rate is converted, there arises asynchronization between the auditory and visual information. In this study, we investigated the influence of asynchrony between talker's moving image and voice on word intelligibility. We used 40 minimal pairs of 4-mora-word. In these pairs, the position of minimal contrast, word familiarity, and accent type were controlled. In the experiment, words were presented under visual-only, auditory-only, and auditory-visual conditions. Effect of auditory-visual asynchrony by time-expanded speech was compared with that by simply shifting the relative timing between talker's moving image and voice. The most important finding was that word intelligibility did not decrease even in words with 400ms expansion in auditory-visual condition. In contrast, word intelligibility decreased in words with 400ms asynchronization by shifting the relative timing. These contrastive results suggest the importance of synchronization between talker's moving image and voice at the begining point. These results also suggest the possibility that speech-rate conversion technique conbined with talker's moving image is useful for speech recognition.

  106. The effect of hearing of independent phoneme to word recognition

    35　(9)　593-598　2005/10/28

    Publisher: 日本音響学会

    ISSN： 1346-1109

  107. The consideration of the direction of self-motion influenced by auditory and visual information

    SAKAMOTO Shuichi, SAITO Hideyuki, SUZUKI Yoiti, GYOBA Jiro

    Technical report of IEICE. HIP　105　(165)　137-142　2005/06/30

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    In this study, we investigated the relationship between self-motion perception and audio-visual information. As the vestibular stimuli, we constructed a swing-like equipment in a sound proof room. A participant sat on this equipment and were swayed back and forth. At the same time, the participant was presented a virtual sound image and random dots which were moving right and left. The results showed that the direction of perceived self-motion was shifted to the direction of the vector composed of the opposite direction of the moving visual images and the direction of the moving sound images. To analyze the effects, a visual task was assigned to a participant during the experiment so that their attention to the visual information was controlled. In this condition, the influence of auditory information to the self-motion was not observed. These results suggest that the influence of auditory information to the self-motion perception closely relates with attentional intensity to the auditory stimuli.

  108. The effects of auditory characteristics to the dichotic listening hearing aid processing

    35　(3)　203-208　2005/04/22

    Publisher: 日本音響学会

    ISSN： 1346-1109

  109. The effects of the attention on self-motion perception by the sound and visual images

    SAITO H., SAKAMOTO S., SUZUKI Y., GYOBA J.

    2005　(1)　673-674　2005/03/08

    ISSN： 1340-3168

  110. The effects of speech expansion and pause duration on sentence intelligibility in older normal hearing listeners

    TANAKA A., SAKAMOTO S., SUZUKI Y.

    2005　(1)　313-314　2005/03/08

    ISSN： 1340-3168

  111. Development of Piezoelectric bone conduction vibrator for wide band acoustic output

    TAMURA M, ABE Y, SAKAMOTO S, ABE M, SUZUKI Y, KAWAMATA M

    2005　(1)　499-500　2005/03/08

    ISSN： 1340-3168

  112. Effects of speech-rate and pause duration on sentence intelligibility

    35　(2)　73-78　2005/03/03

    Publisher: 日本音響学会

    ISSN： 1346-1109

  113. Effects of speech-rate and pause duration on sentence intelligibility

    TANAKA Akihiro, SAKAMOTO Shuichi, SUZUKI Yo-iti

    IEICE technical report. Speech　104　(695)　43-48　2005/02/24

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    Speech-rate slowing techniques may aid speech comprehension by allowing more time for perceptual and cognitive processes. However, if only the speech-rate of a telecast is converted, auditory and visual information become asynchronous. One possible method to resolve the problem is to reduce the pause durations between phrases; unfortunately, this can evoke a marked negative effect. For that reason, the present study examines the mutual effects of the speech-rate and pause duration on sentence intelligibility. We manipulated the lengths of phrases relative to the original length (0, +100, +200, +300, and +400 ms), and the pause durations between phrases in a sentence (0, 100, 200, 300, and 400 ms). Listeners were asked to write down sentences that they discerned from the noise. The intelligibility score increased in younger and older listeners when the speech signal was expanded. Regarding the pause duration, intelligibility was the best when the pause duration was 200 ms in younger listeners; in older listeners, the intelligibility score was the highest when the pause durations were 200 ms and 400 ms.

  114. The effects of the direction of moving sound and visual images on self-motion perception

    SAITO Hideyuki, SAKAMOTO Shuichi, SUZUKI Yoiti, GYOBA Jiro

    Technical report of IEICE. HIP　104　(526)　31-36　2004/12/10

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    We investigated effects of audio and visual information on self-motion. In the first experiment, we presented periodic longitudinal linear motion with fixed visual images and laterally moving sound images of which directions were conflicted with the direction of the vestibular sensation. The results showed that the direction of perceived self-motion was shifted to the direction of the moving sound images. In the next experiment, we presented laterally moving visual images and sound images which moved perpendicularly to the linear motion. The directions of the moving visual and sound images were set to either same ones or opposite ones. The results showed that the direction of perceived self-motion was shifted to the direction of the vector composed of the opposite direction of the moving visual images and the direction of the moving sound images.

  115. Change of forward-masked thresholds in masker of different frequencies

    34　(8)　563-566　2004/10/22

    Publisher: 日本音響学会

    ISSN： 1346-1109

  116. Effects of lip-reading information on VCV speech intelligibility for hearing impaired listeners

    34　(7)　517-522　2004/09/17

    Publisher: 日本音響学会

    ISSN： 1346-1109

  117. Effects of lip-reading information on VCV speech intelligibility for hearing impaired listeners

    SAKAMOTO Shuichi, KUSHIOKA Yoichi, SUZUKI Yoiti

    Technical report of IEICE. Thought and language　104　(316)　31-36　2004/09/10

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    We investigated how normal and hearing impaired listeners used lip-reading information when they listened to speech signals. To examine the effects of preceding vowel, three kinds of speech intelligibility tests, i.e. speech only (A condition), visual only (V condition) and speech and visual (AV condition), were conducted for normal and hearing impaired listeners. Nonsense monosyllables and nonsense VCV speech samples were used as speech signals. Results showed that the preceding vowel was useful for the lip-reading. Moreover, the results of asymmetric MDS(multidimensional scaling) showed that the effects of preceding vowel were different between normal and hearing impaired listeners, and between the degree of hearing impairment.

  118. Effect of dichotic presentation on speech intelligibility and on sound localization by elderly people

    MURASE Atsunobu, NAKAJIMA Fumie, SAKAMOTO Shuichi, SUZUKI Yoiti, KAWASE Tetsuaki, KOBAYASHI Toshimitsu

    Technical report of IEICE. EA　104　(246)　37-42　2004/08/12

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    Sensorineural hearing loss is commonly accompanied by reduced frequency selectivity and temporal resolution. The reduction of frequency selectivity engenders remarkable disadvantages through masking, particularly masking of middle and high frequency components by intense low frequency components: the so-called upward spread of masking. By splitting into two complimentary parts in terms of frequency spectra to reduce masking between contiguous frequency bands and presenting it dichotically might improve speech intelligibility. This paper investigates sound image localization perceived in dichotic listening condition, as well as speech intelligibility. In a dichotic listening condition, speech signals were divided into two frequency bands by considering formant frequencies of Japanese vowels. (1)Results of a speech intelligibility test using vowel/u/-consonant-vowel nonsense syllables showed that improvement in intelligibility was observed when the dividing frequency was 0.8 kHz (between Fl and F2 of Japanese vowel /u/). (2)Results of a sound image localization test in dichotic presentation showed that hearing impaired listeners tend to localize sound stimuli to the side from which the low frequency part was presented. (3)It is possible to improve those sound localization errors in dichotic presentation by applying interaural time difference(ITD) as time-intensity trading.

  119. The effects of apparent moving sound images conflicted with vestibular information to self-motion perception

    SAKAMOTO Shuichi, KUGE Satoshi, SUZUKI Yoiti, GYOBA Jiro

    6　(2)　25-26　2004/03/08

    ISSN： 1344-7270

  120. An approach to equalize word intelligibilities by controlling SNR

    33　(10)　641-646　2003/12/15

    Publisher: 日本音響学会

    ISSN： 1346-1109

  121. TSP (time stretched pulse) 信号を用いた耳管開放症重症度診断の為の新しい sonotubometry

    馬場 保, 狩野 茂之, 佐藤 利徳, 川瀬 哲明, 小林 俊光, 中島 史絵, 坂本 修一, 鈴木 陽一

    Otology Japan　13　(4)　307-307　2003/09/12

    ISSN： 0917-2025

  122. The effects of linear moving sound images on linear self-motion perseption

    SUZUKI F., SAKAMOTO S., SUZUKI Y., GYOUBA J.

    2003　(1)　533-534　2003/03/18

    ISSN： 1340-3168

  123. The effect of lip-reading information for VCV speech intelligibility in hearing impaired listeners

    KUSHIOKA Y, SAKAMOTO S, SUZUKI Y

    2003　(1)　465-466　2003/03/18

    ISSN： 1340-3168

  124. The effect of visual information for VCV speech intelligibility in hearing impaired listeners

    KUSHIOKA Yoichi, SAKAMOTO Shuichi, SUZUKI Yoiti

    Technical report of IEICE. HIP　102　(533)　13-18　2002/12/12

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    We investigated on how speech audibility of hearing impaired listeners was influenced by existance of preceding vowel and interaction between visual information and speech intelligibility in hearing impaired listeners was examined with two types of speech stimulus. One was nonsense monosyllable and the other was VCV. Three kinds of speech intelligibility test, i.e. speech only(A condition), visual only(V condition) and speech and visual(AV condition) ,were conducted for normal and hearing impaired listeners. Results showed that the influence of preceding vowel was different between normal and hearing impaired listeners. This suggests that speech intelligibility obtained by hearing impaired listeners was more influenced than that obtained by normal listeners.

  125. The effects of moving sound images on self-motion perseption

    SUZUKI FUMIHIKO, SAKAMOTO SHUICHI, SUZUKI YOITI, GYOBA JIRO

    Technical report of IEICE. HIP　102　(533)　19-23　2002/12/12

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

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    We generated one-dimentional pendulum accelaration and moving sound images to investigate perceived accelaration. The perceived accelaration was influenced by auditory information by its direction synchronizing with the subjects' one-dimentional pendulum motion. That is, when sound image moved anti-phase of subjects' motion, estimated accelatration was stronger than actual one, while estimated accelaration when they moved same direction was lower than actual one. These findings suggest that perceived one-dimentional pendulum accelaration is determined by not only vestibule information but alse auditory information which involves sound location and the direction of sound motion.

  126. An analytical investigation of self-motion perception induced by auditory information

    SAKAMOTO Shuichi, OSADA Yusuke, SUZUKI Yoiti, GYOBA Jiro

    Proceedings of the Virtual Reality Society of Japan,annual conference　7　561-564　2002/09/18

    Publisher: 日本バ-チャルリアリティ学会

    ISSN： 1342-4564

  127. An exploratory investigation of the effects of auditory information on self-motion perception

    32　(4)　277-282　2002/06/21

    Publisher: 日本音響学会

    ISSN： 1346-1109

  128. Experimental results on the dependence of McGurk effect on the directional disparity between auditory and visual stimuli

    MISHIMA H., SAKAMOTO S., SUZUKI Y., KONDO T.

    2002　(1)　445-446　2002/03/18

    ISSN： 1340-3168

  129. Possible use of dichotic listening in hearing aid

    KAWASE T, KOBAYASHI T, SAKAMOTO S., SUZUKI Y.

    2002　(1)　515-516　2002/03/18

    ISSN： 1340-3168

  130. A study of the effects of auditory information on self-motion perception

    OSADA Yusuke, SAKAMOTO Shuichi, SUZUKI Yoiti, GYOBA Jiro

    Technical report of IEICE. HIP　101　(512)　7-12　2001/11/10

    Publisher: The Institute of Electronics, Information and Communication Engineers

    ISSN： 0913-5685

    More details Close

    Self-motion perception is known as the perception that is integrated from visual, postural and somatic information. However, whether auditory information including spatial information produces self-motion has not investigated. To investigate this, we presented auditory stimuli producing a moving sound image to examine whether self-motion is perceived by subjects without visual information. Self-motion was assessed by subjective category scale as well as sway of gravity induced by body movement as an objective measure.

  131. The influence of the word association toward the Japanese word intelligibility under consideration of word familiarities.

    SAKAMOTO S., SUZUKI Y., AMANO S., KONDO T.

    2001　(1)　405-406　2001/03/01

    ISSN： 1340-3168

  132. 親密度と単語の音韻バランスを統制した単語了解度試験用リストの構築

    坂本 修一, 鈴木 陽一, 天野 成昭

    東北大学電通談話会記録　69　(2)　597-610　2000/12

    Publisher: 東北大学電気通信研究所工学研究会

    ISSN： 0385-7719

  133. 親密度を統制した単語リストによる単語了解度試験とその教育場面への応用

    鈴木陽一, 近藤公久, 天野成昭, 小沢賢司, 坂本修一, 曽根敏夫

    日本教育工学会研究報告集　(98-4)　39-46　1998/07

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Books and Other Publications 9

  1. よくわかる耳管開放症 : 診断から耳管ピン手術まで

    小林, 俊光, 池田, 怜吉, 川瀬, 哲明, 菊地, 俊晶, 大島, 猛史, 香取, 幸夫, 小池, 卓二, 坂本, 修一

    全日本病院出版会　2022/05

    ISBN: 9784865198126

  2. The Technology of Binaural Understanding

    Yôiti Suzuki, Akio Honda, Yukio Iwaya, Makoto Ohtani, Shuichi Sakamoto

    Springer　2020/09

  3. 感覚・知覚心理学

    行場, 次朗, 太田, 信夫

    北大路書房　2018/11

    ISBN: 9784762830426

  4. 音響キーワードブック

    日本音響学会編

    コロナ社　2016

  5. Interface oral health science 2014

    Tetsuaki Kawase, Yoko Hori, Takenori Ogawa, Shuichi Sakamoto, Yo-iti Suzuki, Yukio Katori

    Springer Open　2014

  6. 電子情報通信学会知識ベース

    坂本修一, 鈴木陽一

    2011/04

  7. Principles and applications of spatial hearing

    Shuichi Sakamoto, Jun'ichi Kodama, Satoshi Hongo, Takuma Okamoto, Yukio Iwaya, Yo-iti Suzuki

    World Scientific　2011

  8. 親密度別単語了解度試験用音声データセット2007（FW07）

    近藤公久, 天野成昭, 坂本修一, 鈴木陽一

    国立情報学研究所 音声資源コンソーシアム　2007

  9. 親密度別単語了解度試験用音声データセット2003（FW03）

    天野成昭, 近藤公久, 坂本修一, 鈴木陽一

    国立情報学研究所 音声資源コンソーシアム　2003

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Presentations 131

  1. The effect of angular disparity between sound source sequences on the perceptual organization of auditory objects

    Shuichi Sakamoto, Maho Tamakawa

    185th Meeting of the Acoustical Society of America (Acoustics 2023)　2023/12/06

  2. Effects of vowel coloration on perceived directional offsets between single-syllable speech sounds

    William L. Martens, Shuichi Sakamoto

    185th Meeting of the Acoustical Society of America (Acoustics 2023)　2023/12/05

  3. Effect of cross-sectional orientation on the accuracy of two-dimensional near-field head-related transfer function synthesis based on spherical harmonics

    Shuichi Sakamoto, Kota Kitamura

    ASK-ASJ Joint Session　2023/10/02

  4. Accuracy of perceived position of relatively rotating sound during passive body rotation

    Shuichi Sakamoto, Soichiro Moribe

    21st International Multisensory Research Forum (IMRF)　2023/06/28

  5. Binaural sound field recording and reproduction using spherical microphone arrays Invited

    Shuichi Sakamoto

    The 7th Noise and Vibration: Emerging Methods (NOVEM 2023)　2023/01/11

  6. Toward 3D binaural synthesis based on spatial hearing Invited

    Shuichi Sakamoto

    Student camp, The 24th International Congress on Acoustics　2022/10/22

  7. Effect of visual target ambiguity on the semicircular ocular reflex

    Yumiko O. Kato, Fumihiro Mochizuki, Koshi Mikami, Shuichi Sakamoto, Izumi Koizuka

    31st Bárány Society Meeting　2022/05

  8. Audiovisual interaction of selective attention

    Satoshi Shioiri, Shin Ono, Wu Wei, Shuichi Sakamoto, Ryo Teraoka, Yoshiyuki Sato, Yasuhiro Hatori, Chia-huei Tseng, Ichiro Kuriki

    43rd European Conference on Visual Perception　2021/08/24

  9. Spatial extent of audiovisual cross-modal attention

    Satoshi Shioiri, Shin Ono, Wei Wei, Shuichi Sakamoto, Ryo Teraoka, Yoshiyuki Sato, Yasuhiro Hatori, Chia-huei Tseng, Ichiro Kuriki

    2021 Vision Sciences Society (VSS) annual meeting　2021/05

  10. Effect of auditory spatial attention in rear side

    Ryo Teraoka, Shuichi Sakamoto, Zhenglie Cui, Yôiti Suzuki, Satoshi Shioiri

    179th Meeting of the Acoustical Society of America　2020/12/09

  11. Separation of multiple sound sources in the same direction by instantaneous spectral estimation

    Kenji Ozawa, Kanji Watanabe, Shuichi Sakamoto

    Proc. 2020 IEEE 9th Global Conference on Consumer Electronics (GCCE2020)　2020/09

  12. Effect of visual target ambiguity on the semicircular ocular reflex

    Yumiko O. Kato, Koshi Mikami, Shuichi Sakamoto, Izumi Koizuka

    The Association for Research in Otolaryngology (ARO) 43rd MidWinter Meeting　2020/01

  13. 定常的誘発電位を用いた視聴覚同時注意の空間分布の測定

    小野 真, 坂本 修一, 寺岡 諒, 佐藤 好幸, 羽鳥 康裕, Tseng Chia-Huei, 栗木 一郎, 塩入 諭

    Vision　2020/01

  14. iPad版iCI2004の標準化に関する報告および文章検査標準化に向けた取り組み

    東野哲也, 井脇貴子, 樫尾明憲, 佐藤宏昭, 武田英彦, 中島崇博, 羽藤直人, 茂木英明, 赤松祐介, 熊谷文愛, 城間将江, 高橋信雄, 對島結, 松田悠佑, 八重樫恵子, 天野成昭, 坂本修一, 西尾信哉, 米本清, 東野哲也, 宇佐美真一

    日本耳科学会総会・学術講演会(Web)　2020

  15. 水平方向ベクションが主観的正面付近の音像定位に及ぼす影響

    前田啓, 前田啓, 本多明生, 坂本修一, 鈴木陽一

    日本音響学会研究発表会講演論文集(CD-ROM)　2019/08/21

  16. Attempt on the measurement of spatial extent of audiovisual attention by EEG International-presentation

    Shin Ono, Shuichi Sakamoto, Yoshiyuki Sato, Yasuhiro Hatori, Chia-huei Tseng, Ichiro Kuriki, Satoshi Shioiri

    Proc. 2019 Asia-Pacific Conference on Vision (APCV)　2019/07/29

  17. 聴覚情報処理障害を疑った患者に対するスピーカアレイを用いた競合音声下単語了解度検査

    川瀬 哲明, 寺岡 諒, 佐々木 志保, 小渕 千絵, 坂本 修一

    ＡＵＤＩＯＬＯＧＹ ＪＡＰＡＮ　2019

  18. 正面方向以外における聴覚的注意の空間特性

    寺岡諒, 坂本修一, CUI Zhenglie, 鈴木陽一, 塩入諭

    日本音響学会研究発表会講演論文集(CD-ROM)　2019

  19. 音声と狭帯域雑音に対する空間的注意効果の様相の比較

    寺岡諒, 坂本修一, CUI Zhenglie, 鈴木陽一, 塩入諭

    日本音響学会研究発表会講演論文集(CD-ROM)　2019

  20. Application of time-domain near-field acoustical holography to the high-order Ambisonics presentation of moving sound sources

    Jorge Trevino, Shuichi Sakamoto, Yo-iti Suzuki

    Proc. 176th Meeting of the Acoustical Society of America　2018/11

  21. Effects of auditory selective attention on word intelligibility and detection threshold of narrow-band noise

    SAKAMOTO Shuichi

    Proc. 176th Meeting of the Acoustical Society of America　2018/11

  22. 回復力を有する屋外拡声子局の公衆回線利用の検討

    遠藤仁, 苣木禎史, 坂本修一, 西村竜一, CUI Zhenglie

    日本音響学会研究発表会講演論文集(CD-ROM)　2018

  23. 防災行政無線屋外拡声子局の最適再生レベルに関する検討

    西村竜一, 坂本修一, 苣木禎史, CUI Zhenglie

    日本音響学会研究発表会講演論文集(CD-ROM)　2018

  24. MEMS気圧センサを用いたインフラサウンド観測装置の性能評価

    齋藤雄二, 西村竜一, 坂本修一, 鈴木陽一

    日本音響学会研究発表会講演論文集(CD-ROM)　2018

  25. Effects of listener's whole-body rotation and sound duration on sound localization accuracy

    Akio Honda, Sayaka Tsunokake, Yôiti Suzuki, Shuichi Sakamoto

    Proc. 174th Meeting of the Acoustical Society of America　2017/12

  26. Applications of operator theory and symmetry arguments to sound field recording and reproduction

    Jorge Trevino, Shuichi Sakamoto, Yôiti Suzuki

    Proc. 174th Meeting of the Acoustical Society of America　2017/12

  27. Enhancing the effect of full-body vibration generated from audio signal on perceived reality

    Zhenglie Cui, Hiroyuki Yagyu, Shuichi Sakamoto, Yôiti Suzuki, Jiro Gyoba

    Proc. 18th International Multisensory Research Forum (IMRF)　2017/05

  28. 聴取者回転時の音像定位におけるmultiple‐lookモデルの妥当性について

    角掛沙也香, 本多明生, 鈴木陽一, 坂本修一

    日本音響学会研究発表会講演論文集(CD-ROM)　2017/03/01

  29. Sound source separation using image signal processing based on sparsity of sound field

    Masaaki Ito, Kenji Ozawa, Masanori Morise, Genya Shimizu, Shuichi Sakamoto

    Proc. 5th Joint Meeting of the Acoustical Society of America and the Acoustical Society of Japan　2016/12

  30. A nested beamforming approach to sound source separation using an array-of-arrays recording system

    Jorge Trevino, Shuichi Sakamoto, Yôiti Suzuki

    Proc. 5th Joint Meeting of the Acoustical Society of America and the Acoustical Society of Japan　2016/12

  31. Effects of a listener's very slow rotation on sound localization accuracy

    Sayaka Tsunokake, Akio Honda, Yôiti Suzuki, Shuichi Sakamoto

    Proc. 5th Joint Meeting of the Acoustical Society of America and the Acoustical Society of Japan　2016/12

  32. Sound field interpolation in the spatial domain with a rigid spherical microphone array

    Cesar Salvador, Shuichi Sakamoto, Jorge Trevino, Yôiti Suzuki

    Proc. 5th Joint Meeting of the Acoustical Society of America and the Acoustical Society of Japan　2016/12

  33. Speech Intelligibility Prediction Method using Machine Learning for Outdoor Public Address Systems Invited

    Yosuke Kobayashi, Kengo Ohta, Kazuhiro Kondo, Shuichi Sakamoto

    Proc. 5th Joint Meeting of the Acoustical Society of America and the Acoustical Society of Japan　2016/12

  34. Auditory space perception during self-motion Invited

    Shuichi Sakamoto, Wataru Teramoto, Akio Honda, Yôiti Suzuki, Jiro Gyoba

    Proc. 5th Joint Meeting of the Acoustical Society of America and the Acoustical Society of Japan　2016/12

  35. Optimization of speech presentation in mass-notification sound systems based on word intelligibility Invited

    Shuichi Sakamoto, Zhenglie Cui, Masayuki Morimoto, Yôiti Suzuki

    Proc. 5th Joint Meeting of the Acoustical Society of America and the Acoustical Society of Japan　2016/12

  36. Minimum audible angle during passive horizontal rotation

    Akio Honda, Yoji Masumi, Yo-iti Suzuki, Shuichi Sakamoto

    Proc. 17th International Multisensory Research Forum (IMRF)　2016/06

  37. Effect of vertical vection on vertical sound localization

    Zhenglie Cui, Shuichi Sakamoto, Yo-iti Suzuki

    Proc. 17th International Multisensory Research Forum (IMRF)　2016/06

  38. Effect of visual and vestibular information on auditory space perception

    Shuichi Sakamoto, Keishi Hanakago, Zhenglie Cui, Wataru Teramoto, Yo-iti Suzuki, Jiro Gyoba

    Proc. 171st Meeting of the Acoustical Society of America　2016/05

  39. Recording of extended sound fields using spherical microphone arrays and a-priori knowledge of the sound source positions

    Jorge Trevino, Keigo Wakayama, Shuichi Sakamoto, Yo-iti Suzuki, Hideaki Takada, Manabu Okamoto

    Proc. 171st Meeting of the Acoustical Society of America　2016/05

  40. 聴取者受動回転時における音像定位精度の回転速度依存性の検討

    角掛沙也香, 本多明生, 鈴木陽一, 坂本修一

    日本音響学会研究発表会講演論文集(CD-ROM)　2016/02/24

  41. Effects of a movie of speaker's irrelevant speech utterance on recall tasks

    Tomoko Ohtani, Shun Torai, Shuichi Sakamoto, Yo-iti Suzuki

    Proc. 16th International Multisensory Research Forum (IMRF)　2015/06

  42. Passive horizontal rotation affects sound localization acuity at the subjective front

    Akio Honda, Yoji Masumi, Yo-iti Suzuki, Shuichi Sakamoto

    Proc. 16th International Multisensory Research Forum (IMRF)　2015/06

  43. 受動回転時の最小弁別角度に回転速度が与える影響

    増見洋治, 鈴木陽一, 本多明生, 坂本修一

    日本音響学会研究発表会講演論文集(CD-ROM)　2015/03/06

  44. Listener's head rotation affects their sound localization acuity at the subjective front

    Akio Honda, Yo-iti Suzuki, Yoji Masumi, Kagesho Ohba, Shuichi Sakamoto, Yukio Iwaya

    Proc. Motion tracking and moving audio　2014/10

  45. Perceived reality in multimodal content as a function of synchrony between vibration and audio-visual information

    Shuichi Sakamoto, Emi Takahashi, Yo-iti Suzuki, Jiro Gyoba

    Proc. 15th International Multisensory Research Forum (IMRF)　2014/06

  46. Contribution of detailed parts around talker's mouth for audio-visual speech perception

    Shuichi Sakamoto, Gen Hasegawa, Toru Abe, Tomoko Ohtani, Yo-iti Suzuki, Tetsuaki Kawase

    Proc. 167th Meeting of the Acoustical Society of America　2014/05

  47. Evaluation of a high-order Ambisonics decoder for irregular loudspeaker arrays through reproduced field measurements

    Jorge Torevino, Takuma Okamoto, Yukio Iwaya, Shuichi Sakamoto, Yo-iti Suzuki

    Proc. 167th Meeting of the Acoustical Society of America　2014/05

  48. Minimum audible angle at the subjective front during active and passive listener's head rotation

    Yo-iti Suzuki, Kagesho Ohba, Akio Honda, Shuichi Sakamoto, Yukio Iwaya

    Proc. 166th Meeting of the Acoustical Society of America　2013/12

  49. Difference of the perceived auditory space between walking and passive self-motion

    Shuichi Sakamoto, Hideaki Terashima, Wataru Teramoto, Yo-iti Suzuki, Jiro Gyoba

    Proc. 166th Meeting of the Acoustical Society of America　2013/12

  50. Distortion of auditory space during linear vection

    Wataru Teramoto, Zhenglie Cui, Kazuki Moishi, Shuichi Sakamoto, Yo-iti Suzuki, Jiro Gyoba

    Proc. 36rd European Conference on Visual Perception (ECVP'13)　2013/08

  51. Minimum audible angle at subjective front during listener's head rotation

    Yo-iti Suzuki, Kagesho Ohba, Shuichi Sakamoto, Akio Honda, Yukio Iwaya

    Proc. 14th International Multisensory Research Forum (IMRF)　2013/06

  52. Effects of full body vibration to perceived sense of verisimilitude and sense of presence

    Shuichi Sakamoto, Gen Hasegawa, Akio Honda, Yukio Iwaya, Yôiti Suzuki, Jiro Gyoba

    Proc. 13th International Multisensory Research Forum (IMRF)　2012/06

  53. Visual benefit in bimodal training with highly distorted speech sound

    Mika Sato, Tetuaki Kawase, Shuichi Sakamoto, Yôiti Suzuki, Toshimitsu Kobayashi

    Proc. 13th International Multisensory Research Forum (IMRF)　2012/06

  54. Realization of sound space information acquisition system using a 252 ch spherical microphone array

    Shuichi Sakamoto, Jumpei Matsunaga, Satoshi Hongo, Takuma Okamoto, Yukio Iwaya, Yôiti Suzuki

    Proc. Acoustics 2012 Hong Kong　2012/05

  55. Visual Benefit in Bimodal Training of Speech Understanding with Highly Distorted Speech Sound

    Mika Sato, Tetsuaki Kawase, Shuichi Sakamoto, Yôiti Suzuki, Toshimitsu Kobayashi

    Proc. The Association for Research in Otolaryngology (ARO) 35th MidWinter Meeting　2012/02

  56. Human Multimodal Perception for Future High-definition Communications Invited

    Yôiti Suzuki, Yukio Iwaya, Shuichi Sakamoto, Takuma Okamoto

    National Tsing Hua University and Tohoku University Bilateral Workshop　2011/11

  57. Adcanced Auditory Systems for Active Listening Invited

    Yôiti Suzuki, Yukio Iwaya, Shuichi Sakamoto, Takuma Okamoto

    The First International Conference on Robot, Vision and Signal Processing (RVSP2011)　2011/11

  58. Direct contribution of auditory motion information to sound-induced visual motion perception

    Souta Hidaka, Wataru Teramoto, Yoichi Sugita, Yuko Manaka, Shuichi Sakamoto, Yôiti Suzuki

    Proc. 12th International Multisensory Research Forum (IMRF)　2011/11

  59. Perceived direction of self-motion from orthogonally directed visual and vestibular stimulation in passive and active observation Invited

    Kenzo Sakurai, Toshio Kubodera, Philip M. Grove, Shuichi Sakamoto, Yôiti Suzuki

    Proc. 12th International Multisensory Research Forum (IMRF)　2011/11

  60. The sense of verisimilitude has different spatial-temporal characteristics from those producing the sense of presence in the evaluation process of audiovisual contents

    Takayuki Kanda, Akio Honda, Hiroshi Shibata, Nobuko Asai, Wataru Teramoto, Shuichi Sakamoto, Yukio Iwaya, Jiro Gyoba, Yôiti Suzuki

    Proc. 12th International Multisensory Research Forum (IMRF)　2011/11

  61. Sound localization in the coexistence of visually induced self-motion and vestibular information

    Hideaki Terashima, Zhenglie Cui, Shuichi Sakamoto, Yukio Iwaya, Yôiti Suzuki

    Proc. 12th International Multisensory Research Forum (IMRF)　2011/11

  62. Distortion of auditory space during linear self-motion

    Wataru Teramoto, Fumimasa Furune, Shuichi Sakamoto, Jiro Gyoba, Yôiti Suzuki

    Proc. 12th International Multisensory Research Forum (IMRF)　2011/11

  63. Perceived direction of self-motion from vestibular and orthogonally directed visual stimulation for supine observers

    Kenzo Sakurai, Toshio Kubodera, Philip Grove, Shuichi Sakamoto, Yôiti Suzuki

    Proc. 34rd European Conference on Visual Perception (ECVP'11)　2011/08

  64. 模擬騒音環境下における迅速な単語了解度測定方法の検討:選択肢法と書き取り法との比較

    佐藤洋, 坂本修一, 鈴木陽一, 天野成昭, 近藤公久

    日本音響学会研究発表会講演論文集(CD-ROM)　2011/03/02

  65. 視覚誘導性自己運動感覚が頭部前後方向の音像定位に及ぼす影響

    電子情報通信学会ヒューマンコミュニケーショングループ（HCG） 2010年度HCGシンポジウム　2010/12/15

  66. 直線等加速度自己運動による音空間歪み

    多感覚研究会　2010/12/04

  67. Audio-visual synchrony perception of simplified speech sounds heard as speech and non-speech

    多感覚研究会　2010/12/04

  68. Multimodal integration in perceiving direction of self-motion from real somatic motion and orthogonally directed optic flow pattern

    多感覚研究会　2010/12/04

  69. Three-dimensional acoustic sensing and display systems realizing high sense-of-presence International-presentation

    The 12th Takayanagi Kenjiro Memorial Symposium　2010/11/18

  70. Implementation of higher order Ambisonics recording array with 121 microphones International-presentation

    The 3rd Student Organizing International Mini-Conference on Information Electronics Systems　2010/10/19

  71. 直線等加速度自己運動中における音空間知覚の歪みに関する実験的検討

    日本音響学会聴覚研究会　2010/10/16

  72. 視覚と前庭覚のクロスモーダルな随伴性残効について

    信学技報　2010/10/14

  73. 周波数変換帯域雑音音声を用いた聴覚トレーニングに関する模擬的検討－搬送周波数の違いによる聴覚読話併用訓練後の単語了解度

    第55回日本音声言語医学会総会・学術講演会　2010/10/14

  74. Auditory Displays and Microphone Arrays for Active Listening International-presentation

    40th AES Conference　2010/10/08

  75. High definition auditory sensing and display systems for active listening International-presentation

    4th Japan-France Cooperative Workshop on "Improving the VR Experience"　2010/09/26

  76. 視覚誘導性自己運動知覚が音像定位に及ぼす影響

    日本バーチャルリアリティ学会　2010/09/15

  77. 聴覚刺激が自己運動距離知覚に与える影響

    第8回情報科学技術フォーラム（FIT2010）　2010/09/07

  78. Effects of the alternation of sounds on the perceived direction of visual motion International-presentation

    Wataru Teramoto, Souta Hidaka, Yoichi Sugita, Shuichi Sakamoto, Jiro Gyoba, Yukio Iwaya, Yôiti Suzuki

    The 33rd European Conference on Visual Perception (ECVP''10)　2010/08/22

  79. 252ch等密度球状アレイを用いた3次元音場情報取得システム

    信学会応用音響研究会　2010/08/09

  80. 高次アンビソニクス型音場収録のための121ch球状マイクロホンアレイの構築

    信学会応用音響研究会　2010/08/09

  81. Multimodal integration in perceiving direction of self-motion from real somatic motion and orthogonally directed optic flow pattern International-presentation

    Toshio Kubodera, Philip Grove, Shuichi Sakamoto, Yôiti Suzuki, Kenzo Sakurai

    2010 Asia-Pacific Conference on Vision (APCV)　2010/07/23

  82. Self-motion perception by multimodal stimulation based on virtual reality technology International-presentation

    The 11th International Multisensory Research Forum (IMRF)　2010/06/16

  83. Sounds can induce illusory visual motion perception International-presentation

    The 11th International Multisensory Research Forum (IMRF)　2010/06/16

  84. Audio-visual synchrony perception of simplified speech sounds heard as speech or non-speech International-presentation

    The 11th International Multisensory Research Forum (IMRF)　2010/06/16

  85. Bimodal training of speech understating with highly distorted speech sound International-presentation

    Mika Sato, Tetsuaki Kawase, Shuichi Sakamoto, Yôiti Suzuki, Toshimitsu Kobayashi

    The 11th International Multisensory Research Forum (IMRF)　2010/06/16

  86. Temporal properties of multimodal integration in perceiving direction of self-motion from visual and vestibular information International-presentation

    Toshio Kubodera, Philip M. Grove, Shuichi Sakamoto, Yôiti Suzuki, Kenzo Sakurai

    The 11th International Multisensory Research Forum (IMRF)　2010/06/16

  87. The contribution of spectral-cue-based sound localization to illusory visual motion perception International-presentation

    Wataru Teramoto, Yuko Manaka, Souta Hidaka, Yoichi Sugita, Ryota Miyauchi, Shuichi Sakamoto, Jiro Gyoba, Yukio Iwaya, Yôiti Suzuki

    The 11th International Multisensory Research Forum (IMRF)　2010/06/16

  88. Audio-visual synchrony perception of simplified speech sound heard as speech and non-speech

    Kaori Asakawa, Akihiro Tanaka, Shuichi Sakamoto, Yôiti Suzuki

    Proc. 11th International Multisensory Research Forum (IMRF)　2010/06

  89. Sound can induce illusory visual motion perception

    Souta Hidaka, Wataru Teramoto, Yoichi Sugita, Yuko Manaka, Ryota Miyauchi, Shuichi Sakamoto, Jiro Gyoba, Yukio Iwaya, Yôiti Suzuki

    Proc. 11th International Multisensory Research Forum (IMRF)　2010/06

  90. 「迫真性」の追求: 本物らしさを定義する時空間情報

    日本認知心理学会第8回大会　2010/05/29

  91. Multi-modally perceived direction of self-motion from orthogonally directed visual and vestibular stimulation International-presentation Invited

    Kenzo Sakurai, Toshio Kubodera, Philip Grove, Shuichi Sakamoto, Yôiti Suzuki

    2010 Vision Sciences Society (VSS) annual meeting,　2010/05/07

  92. Audio-visual temporal perception for perceptually simplified speech sound and natural face image International-presentation

    The 5th International Symposium on Medical, Bio- and Nano-Electronics in Sendai　2010/02/24

  93. 自己運動知覚を担う視覚系と前庭感覚系との統合過程の時間特性

    日本視覚学会2010年冬季大会　2010/01/20

  94. 雑音下における音声明瞭度の刺激間差とその補正:FW03を用いた検討

    近藤公久, 坂本修一, 天野成昭, 鈴木陽一

    日本音響学会研究発表会講演論文集(CD-ROM)　2009/09/08

  95. Experimental evaluation of the two-stage binaural speech enhancement with wiener filter for speech enhancement and sound localization

    Junfeng Li, Shuichi Sakamoto, Satoshi Hongo, Masato Akagi, Yôiti Suzuki

    Proc. International Symposium on Auditory and Audiological Research (ISAAR)　2009/08

  96. Effect of vestibular information on sound source distance travelled estimation

    Shuichi Sakamoto, Fumimasa Furune, Wataru Teramoto, Kenzo Sakurai, Jiro Gyoba, Yôiti Suzuki

    Proc. 10th International Multisensory Research Forum (IMRF)　2009/06

  97. Audio-visual synchrony perception for stimulus onset and offset

    Maori Kobayashi, Shuichi Sakamoto, Yôiti Suzuki

    Proc. 10th International Multisensory Research Forum (IMRF)　2009/06

  98. Multimodal integration in perceiving direction of self-motion from visual and vestibular stimulation

    Toshio Kubodera, Philip M. Grove, Shuichi Sakamoto, Yôiti Suzuki, Kenzo Sakurai

    Proc. 10th International Multisensory Research Forum (IMRF)　2009/06

  99. 雑音下における単語中のモーラ明瞭度:親密度別単語了解度試験用音声データセット2007(FW07)による検討

    近藤公久, 天野成昭, 伊集院睦雄, 坂本修一, 鈴木陽一

    日本音響学会研究発表会講演論文集(CD-ROM)　2008/09/03

  100. Improved two-stage binaural speech enhancement based on accurate interference estimation for hearing aids

    Junfeng Li, Shuichi Sakamoto, Satoshi Hongo, Masato Akagi, Yôiti Suzuki

    Proc. International Hearing Aid Research Conference 2008 (IHCON 2008)　2008/08

  101. A two-stage binaural speech enhancement approach for hearing aids with preserving binaural benefits in noisy environments

    Junfeng Li, Shuichi Sakamoto, Satoshi Hongo, Masato Akagi, Yôiti Suzuki

    Proc. Forum Acousticum 2008 (Acoustics '08, Paris)　2008/08

  102. Determination of filtering parameters for dichitic-listening binaural hearing aids Invited

    Yôiti Suzuki, Atsunobu Murase, Motokuni Itoh, Shuichi Sakamoto

    Proc. Forum Acousticum 2008 (Acoustics '08, Paris)　2008/08

  103. A two-input two-output speech enhancement method with binaural spatial information by using (soft decision) mask filter

    Satoshi Hongo, Ai Sasaki, Shuichi Sakamoto, Junfeng Li, Yôiti Suzuki

    Proc. Forum Acousticum 2008 (Acoustics '08, Paris)　2008/08

  104. The effect of postural information on the perceived velocity of moving sound sources

    Shuichi Sakamoto, William L. Martens, Yôiti Suzuki

    Proc. Forum Acousticum 2008 (Acoustics '08, Paris)　2008/08

  105. Synchrony-asynchrony discrimination of audio-visual signals in auditory streaming

    Maori Kobayashi, Shuichi Sakamoto, Yôiti Suzuki

    Proc. Forum Acousticum 2008 (Acoustics '08, Paris)　2008/08

  106. Effects of FM sounds on the perceived magnitude of self-motion induced by vestibular information

    Shuichi Sakamoto, Maori Kobayashi, Mikio Seto, Kenzo Sakurai, Jiro Gyoba, Yôiti Suzuki

    Proc. 9th International Multisensory Research Forum (IMRF)　2008/08

  107. Effects of tonal organization on synchrony-asynchrony discrimination of cross-modal and intra-modal stimuli

    Maori Kobayashi, Shuichi Sakamoto, Yôiti Suzuki

    Proc. 9th International Multisensory Research Forum (IMRF)　2008/08

  108. Spoken Word Intelligibility of Young and Old Adults with Familiarity-Controlled Word Lists 2007 (FW07)

    Tadahisa Kondo, Mutsuo Ijuin, Shigeaki Amano, Shuichi Sakamoto, Yôiti Suzuki

    Proc. XXIX International Congress of Psychology (ICP 2008)　2008/07

  109. 親密度別単語了解度試験用データセット2007(FW07)の構築

    近藤公久, 天野成昭, 坂本修一, 鈴木陽一

    日本音響学会研究発表会講演論文集(CD-ROM)　2008/03/10

  110. Influence of familiarity on spoken word recognition Invited

    Shigeaki Amano, Tadahisa Kondo, Shuichi Sakamoto, Yoiti Suzuki

    The 4th joint meeting of the Acoustical Society of America and Acoustical Society of Japan　2006/12

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    通研インポート200703

  111. Development of word lists for word intelligibility tests in Japanese Invited

    Shuichi Sakamoto, Yo-iti Suzuki, Shigeaki Amano, Tadahisa Kondo

    The 4th joint meeting of the Acoustical Society of America and Acoustical Society of Japan　2006/12

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    通研インポート200703

  112. A new speech enhancement method for two-input two-output hearing aids Invited

    Junfeng Li, Shuichi Sakamoto, Yo-iti Suzuki, Satoshi Hongo

    The 4th joint meeting of the Acoustical Society of America and Acoustical Society of Japan　2006/12

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    通研インポート200703

  113. Effects of Intermodal Timing difference and speed difference on auditory-visual speech perception

    Akihiro Tanaka, Shuichi Sakamoto, Komi Tsumura, Yo-iti Suzuki

    The 4th joint meeting of the Acoustical Society of America and Acoustical Society of Japan　2006/12

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    通研インポート200703

  114. Word and mora intelligibility in “Familiarity-controlled word-lists 2003 (FW03)”

    Tadahisa Kondo, Shigeaki Amano, Shuichi Sakamoto, Yo-iti Suzuki

    The 4th joint meeting of the Acoustical Society of America and Acoustical Society of Japan　2006/12

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    通研インポート200703

  115. Effects of dichotic listening for hearing impaired people

    Ai Sasaki, Atsunobu Murase, Shuichi Sakamoto, Yo-iti Suzuki, Tetsuaki Kawase, Toshimitsu Kobayashi

    The 4th joint meeting of the Acoustical Society of America and Acoustical Society of Japan　2006/12

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    通研インポート200703

  116. 単語親密度を考慮した単語了解度試験用20単語語表の構築

    吉川忠祐, 坂本修一, 天野成昭, 鈴木陽一, 近藤公久

    日本音響学会研究発表会講演論文集(CD-ROM)　2006/03/07

  117. Roles of frequency information and spatial information in auditory search

    Yoiti Suzuki, Masato Saze, Yoichi Sugita, Noriaki Asemi, Shuichi Sakamoto

    Proc. 150th Meeting of the Acoustical Society of America　2005/10

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    通研ＤＢインポート

  118. Effect of two-band dichotic listening for hearing impaired listeners International-presentation

    Shuichi Sakamoto, Atsunobu Murase, Yo-iti Suzuki, Tetsuaki Kawase, Toshimitsu Kobayashi

    149th Meeting of the Acoustical Society of America　2005/05

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    通研ＤＢインポート

  119. Effects of speech-rate and pause duration on sentence intelligibility in younger and loder normal-hearing listeners

    Akihiro Tanaka, Shuichi Sakamoto, Yoiti Suzuki

    Proc. 149th Meeting of the Acoustical Society of America　2005/05

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    通研ＤＢインポート

  120. 視覚刺激への注意の有無が視聴覚情報提示時の自己運動方向知覚に与える影響

    斎藤 英之, 坂本 修一, 鈴木 陽一, 行場 次朗

    日本音響学会研究発表会講演論文集　2005/03/08

  121. Sound level calibration of FW03 based on speech reception threshold

    SAKAMOTO S, YOSHIKAWA T, SUZUKI Y, AMANO S, KONDO T

    日本音響学会研究発表会講演論文集　2005/03/08

  122. 親密度を考慮した単語了解度とバイモーラ頻度の関係

    坂本修一, 天野成昭, 鈴木陽一, 近藤公久

    日本音響学会研究発表会講演論文集　2004/09/21

  123. 単語親密度とSN比を制御した単語了解度試験

    岩岡直樹, 坂本修一, 鈴木陽一, 天野成昭, 近藤公久

    日本音響学会研究発表会講演論文集　2004/03/17

  124. 単語了解度における親密度とSN比の相補関係

    岩岡直樹, 坂本修一, 鈴木陽一, 天野成昭, 近藤公久

    日本音響学会研究発表会講演論文集　2003/09/17

  125. 難聴者の単語了解度試験における親密度の影響

    坂本修一, 鈴木陽一, 天野成昭, 近藤公久

    日本音響学会研究発表会講演論文集　2003/09/17

  126. 直線状移動仮想音源が直線状自己運動感覚に与える影響について

    鈴木 史彦, 坂本 修一, 鈴木 陽一, 行場 次朗

    日本音響学会研究発表会講演論文集　2003/03/18

  127. Experimental results on the dependence of McGurk effect on the directional disparity between auditory and visual stimuli

    MISHIMA H, SAKAMOTO S, SUZUKI Y, KONDO T

    日本音響学会研究発表会講演論文集　2002/03/18

  128. 親密度を統制した単語了解度試験に単語連想が及ぼす影響

    坂本修一, 鈴木陽一, 天野成昭, 近藤公久

    日本音響学会研究発表会講演論文集　2001/03/14

  129. A study on the influence of the familiarity of Japanese words on word intelligibility.

    坂本修一, 小沢賢司, 鈴木陽一, 曽根敏夫, 天野成昭, 近藤公久

    日本音響学会研究発表会講演論文集　1997/03

  130. A consideration on the phonemic balanced word list based on the familiarity of Japanese words.

    坂本修一, 小沢賢司, 鈴木陽一, 曽根敏夫, 天野成昭, 近藤公久

    日本音響学会研究発表会講演論文集　1996/09

  131. Examination of word listing used for a word understanding test of perception deafness persons.

    坂本修一, 小沢賢司, 鈴木陽一, 曽根敏夫, 天野成昭, 近藤公久

    電気関係学会東北支部連合大会講演論文集　1996/08

Show all Show first 5

Industrial Property Rights 2

  1. 音響処理装置

    村瀬敦信, 坂本修一, 鈴木陽一, 川瀬哲明, 小林俊光

    Property Type: Patent

  2. 音処理装置，音処理方法および音処理プログラム

    鈴木陽一, 坂本修一

    Property Type: Patent

Research Projects 46

  1. Neural Basis of Self-initiated brain function

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (A)

    Institution: Tohoku University

    2024/04 - 2028/03

  2. Development of a method for extracting and reproducing sound objects focusing on singular points in multi-dimensional spatio-temporal spectra

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: University of Yamanashi

    2024/04 - 2028/03

  3. 聴取者の心的状態に寄り添い音環境にやさしい文脈活用型音情報提示法の実現

    坂本 修一

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 挑戦的研究(萌芽)

    Institution: 東北大学

    2024/06 - 2027/03

  4. LiD/APD患者の注意機能病理と聞き取り困難症状の可視化・検査法開発に関する研究

    川瀬 哲明, 菅野 彰剛, 坂本 修一, 鈴木 淳

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 基盤研究(C)

    Institution: 東北大学

    2024/04 - 2027/03

  5. ---

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (A)

    Category: Grant-in-Aid for Scientific Research (A)

    Institution: Tohoku University

    2022/04 - 2026/03

  6. アファンタジアの包括的理解に向けた認知・神経科学的検討

    高橋 純一, 安永 大地, 杉村 伸一郎, 行場 次朗, 坂本 修一, 堀川 友慈, 齋藤 五大, 大村 一史

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 基盤研究(B)

    Institution: 福島大学

    2024/04/01 - 2025/03/31

  7. アファンタジアの包括的理解に向けた認知・神経科学的検討

    高橋 純一, 安永 大地, 杉村 伸一郎, 行場 次朗, 坂本 修一, 堀川 友慈, 齋藤 五大, 大村 一史

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 基盤研究(B)

    Institution: 福島大学

    2022/04/01 - 2025/03/31

  8. 前庭眼反射を指標とした空間知覚の多種感覚比較による「酔い」予測方法の開発

    加藤 弓子, 坂本 修一

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 基盤研究(C)

    Institution: 聖マリアンナ医科大学

    2022/04/01 - 2025/03/31

  9. 音の身体性が心理情報処理に及ぼす影響の基盤解明とその応用

    北川 智利, 和田 有史, 坂本 修一, 西浦 敬信

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 基盤研究(A)

    Institution: 立命館大学

    2021/04/05 - 2025/03/31

  10. 「音のsaliency（顕著性）」評価の可塑性誘導に関する挑戦的研究

    川瀬 哲明, 菅野 彰剛, 坂本 修一

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 挑戦的研究(萌芽)

    Institution: 東北大学

    2021/07/09 - 2024/03/31

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    多くの音情報が存在する実環境における聞き取りに必要不可欠な、選択的注意のメカニズムが働く背景には、ヒト側の“聞く”という随意的な要因の他、“音のsaliency（顕著性）＝注意のひきつけ易さ”という音情報そのものが有する要因が重要となる。本研究では、”saliency”の病理という側面を有する耳鳴や音響過敏臨床への展開を視野に入れた「saliencyの可塑性に関与する内的・外的要因の解明」、並びに「介入によるsaliencyの低減、増強の誘導」に関する展開的挑戦を行う。 本年度は、将来の臨床応用の可能性も念頭に音のsaliencyを評価する下記の検査システムを構築し、予備的検討を実施した。①固視（視覚的注意）中のmicro-saccade、瞳孔径を指標にした検査システム：選択的注意に深く関わる青斑核の活動が、瞳孔径や固視中の眼球微細運動（micro-saccade）に反映されることを利用し、固視中に提示された評価音による瞳孔径やmicro-saccadeの変化を評価音の“saliency”の指標として同時計測できるシステムを構築し、検査の再現性、安定性などについての予備的検討をおこなった。②聴覚的注意状態おける評価音提示の影響（抑制効果）を指標にした検査システム、i)心理音響学的評価法：聴覚弁別タスクの正答率、反応時間を指標に、評価テスト音の提示による効果（抑制効果）によりsaliencyを評価するシステムを構築した。ii)脳磁図を用いた神経生理学的評価法：聴性誘発脳磁界N１反応が別刺激への注意で抑制されることを利用した、評価テスト音のsaliency評価法を構築した。

  11. 聴覚的注意・無視メカニズムの臨床病理に関する研究

    川瀬 哲明, 菅野 彰剛, 坂本 修一

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 基盤研究(B)

    Institution: 東北大学

    2020/04/01 - 2024/03/31

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    多くの音源が存在する日常生活での音情報の知覚・認知に必要不可欠となる、聴覚的注意・無視メカニズムの病理に関する研究計画である。聴覚的注意に関する研究は、主に正常人を対象に行われてきたが、本研究では、選択的注意・無視メカニズムの不全の関与が疑われる聴覚情報処理障害患者、耳鳴患者を対象に、注意・無視メカニズム不全の可視化と機序解明を行い、同不全が関与する臨床病理の診断法確立、さらには治療アプローチへの提言考察を行うとともに、ヒトの選択的注意機構の意義解明という本質的なテーマにも迫る。 本年度は、昨年度までの研究の継続である、１）脳磁図N100mを指標とした評価システム（選択的注意に対する注意妨害刺激の影響評価、並びに、ある刺激に選択的注意している際に、急に提示される重要情報（語音）に注意を向ける能力の評価）について、さらに、視覚情報の影響並びに、視聴覚複合刺激による加算効果などについて検討するとともに、２）正常被検者、並びに聴覚情報処理障害の患者を対象とした、心理音響学的評価システム（一側耳（片耳）で行う周波数弁別などのタスクに対する対側耳への妨害音刺激による影響をタスクの正答率、反応時間を指標に評価）を用いた検討開始、並びに、３）音刺激注意時の“micro-saccade抑制効果”観察システム（ヒトの眼球は注視時にもmicro-saccadeと呼ばれる1秒間に数回程度の跳躍的不随意運動観察されるが、聴覚刺激に注意を向けると抑制することが知られており、聴覚的注意の状態を敏感に反映するシステム）を用いた予備的検討の実施、４）micro-saccadeの予備的検討結果を踏まえた瞳孔径を用いた評価システムの構築を、東北大学・UCLの共同研究プログラム（東北大学：坂本、川瀬が参加、UCLは聴覚的注意の世界的第一人者Chait教授が参加）で検討・作成した正常注意評価システムを改編して実施した。

  12. Development of sound source separation method focusing on the singular point in spatio-temporal spectrum

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (C)

    Institution: University of Yamanashi

    2019/04/01 - 2023/03/31

  13. Efficient infrasound sensing based on good knowledge of hearing

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    2019/04/01 - 2023/03/31

  14. ---

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2019/04 - 2023/03

  15. 人工知能と融合するヒューマン・インタラクション技術による業務訓練・支援システムの研究開発

    Offer Organization: NEDO

    System: 戦略的イノベーション創造プログラム（SIP）

    Institution: 東北大学

    2018/12 - 2023/03

  16. Audiovisual spatial attention controlled by self-initiated attention

    Shioiri Satoshi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (A)

    Institution: Tohoku University

    2019/04/01 - 2022/03/31

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    The visual attention is usually shifted by self-initiation in daily life, and we investigated the brain activities corresponding to self-initiated attention to understand the attention process working in daily life. Criticality states of neural activities is a possible index of preparing process of the self-initiated attention. Therefore, we searched critical states related to attentional shift self-initiated, analyzing electroencephalogram data. We conducted an experiment, in which subjects selected the location and time of attention shift freely, allowing also to choose not to shift. The critical state was analyzed separately for EEG results for different brain areas to compare brain activities under shift and no-shift cases. The results suggest that critical states of the global dynamics of brain activity is related to self-initiated attention. Related to this issue, we also worked on multimodal attention processes for attention shift between different modality in future.

  17. Development of a new method with the vestibulo-ocular reflex to evaluate mismatch among modalities causing "sickness"

    Kato Yumiko

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (C)

    Institution: St. Marianna University School of Medicine

    2019/04/01 - 2022/03/31

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    In this study, to get the index for safe use of VR and/or AR, we investigated a estimation method for mismatch among modalities which can causes ‘motion sickness.’ As an evaluation index, using the quantitative change of the vestibulo-ocular reflex (VOR), we found the possibility of estimating the perceived position accuracy common to modalities. VOR is the reflex of the eye motion corresponding to the head movement. We found the degree of ambiguity of the visual spatial position is reflected in the VOR gain, it suggested that evaluating the accuracy of the perceived position by the VOR gain.

  18. Basic research on "the power to ignore sound" -Challenge to elucidate the mechanism and establish an evaluation method

    Tetsuaki Kawase

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Challenging Research (Exploratory)

    Institution: Tohoku University

    2018/06/29 - 2021/03/31

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    Using the music and noise stimuli, the "power to ignore sound" was examined and the following results were obtained: 1) the significant amplitude reduction and latency delay of N1m were observed only by the contra-noise stimuli in bilateral hemisphere, even for low level of contra-music near the psychophysical threshold. 2)the larger suppressive effects induced by contra-music effects than those by contra-noise effects were also observed psychophysically; i.e., the change in response time for detection of the probe sound was significantly larger by adding contralateral music stimuli than by adding contra-noise stimuli. It was suggested that "the ability to ignore sound" can be evaluated by observing individual differences in the N1m reaction due to contralateral distractor and the effect of stimulus sound detection on latency.

  19. Highlighting method of non-salient sound -- To compose environment-friendly sign sound by applying topdown auditory scene analysis --

    SUZUKI Yoiti

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Challenging Research (Exploratory)

    2017/06/30 - 2020/03/31

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    The purpose of this study is to clarify the characteristics of sound which draws attention without adversely affecting the sound environment from spaciotemporal aspects. In the spatial characteristics of auditory attention, the directional dependence of the attention was examined in terms with spacial window. As a result, the azimuthal attention window show the width of around 60 degrees and the window space did not depend on the direction in which attention was directed. Moreover, it was clarified that spatial window was formed on the distance direction. It is a result with high impacts that the 3 dimensional spatial characteristics of auditory attention was clarified. The time characteristics after starting auditory attention were examined to show that the effect continues about 500 ms. These results show that the perceptual process of sound image localization may include the process of moving the direction of the attention.

  20. Elucidation of pathophysiology of auditory processing disorders and establishment of objective diagnostic tool

    Kawase Tetsuaki

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2016/04/01 - 2020/03/31

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    Auditory processing disorder (APD) is a pathological condition that presents listening difficulties especially under background noise, despite displaying normal or near-normal hearing acuity. In this study, we investigated to elucidate the pathophysiology of APD by neurophysiological and psychoacoustic approaches, and tried to establish objective diagnostic methods based on the pathological condition. The following findings were obtained; i.e., 1)usefulness of spatial listening tests such as word intelligibility evaluation using a three-dimensional speaker array, 2) effectiveness of spatial and temporal cue presentation in improving listening of this patient, 3) limitation of hearing assessment using headphone system, and 4) the usefulness of the attention / ignorance function evaluation method using magnetoencephalography.

  21. Formulation of a recording method of the entire sound field by the fusion of acoustical signal processing and artificial intelligence technology

    OZAWA Kenji

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (C)

    Institution: University of Yamanashi

    2016/04/01 - 2019/03/31

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    This project aims to achieve sound source separation based on the two-dimensional fast Fourier transform (2D FFT) of a spatio-temporal sound pressure distribution image consisting of the outputs of a microphone array. The target sound, which arrives from the front of the array, forms vertical stripes in the image. Therefore, its spectral components are perfectly localized as direct current (DC) components along the spatial frequency axis in the 2D-FFT spectrum. In this study, noise suppression was performed by spectral subtraction after the DC components of noise were instantaneously estimated from the spectrum using an artificial intelligence technique, deep neural networks. As a result, the proposed method showed better performance than the conventional methods (delay and sum beamformer, MV beamformer) for separating the target sound from sound with a different direction of arrival. The proposed method is also applicable for separating two sound sources in the same direction.

  22. Development of free-listening-point 3D sound systems based on ADVISE theory

    SUZUKI Yoiti, TREVIÑO Jorge

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (A)

    Institution: Tohoku University

    2016/04/01 - 2019/03/31

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    Our aim is to develop high-definition, 3D sound systems that can control a free-listening point in order to support human active listening. To this end, we developed an advanced and high-precision 3D auditory display based on the theory of ADVISE, i.e. using the virtual sphere model proposed by the project's PI. We succeeded in refining the theory behind sound field synthesis within a virtual sphere. We then considered the sound field outside of the sphere, i.e. sound propagation throughout the room or hall that was virtually presented to the listeners based on ARD. Combining these results, we succeeded in developing a 3D auditory display based on ADVISE. As a complement to these technologies, we also developed high-definition and efficient systems for the acquisition of 3D spatial sound information using compact, spherical microphone arrays. Moreover, we also investigated the perceptual aspects of spatial hearing in humans under active listening conditions to accumulate new knowledge.

  23. Design of resilient outdoor mass-notification system

    Sakamoto Shuichi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2016/07 - 2019/03

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    Outdoor mass-notification systems can effectively convey emergency announcements over wide areas without requiring special receiver devices. However, they are designed under the assumption that all of their components will operate without flaw. If parts of the system are damaged, this can result in serious problems that quickly propagate, causing the whole system to fail. To cope with this kind of problems, we proposed an intelligent mass-notification system. In the proposal, each node communicates its status. The system identifies the nodes as active or inactive and adaptively adjusts the output levels of all loudspeakers based on this information. In addition, we developed an advanced speech presentation method robust to long-path echo conditions by controlling word familiarity and inserting pauses between phrases.

  24. Experimental development of "Fun'iki (auditory ambience)" generator

    SAKAMOTO Shuichi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research

    Category: Grant-in-Aid for Challenging Exploratory Research

    Institution: Tohoku University

    2016/04 - 2019/03

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    Auditory information is important and dominant sensory information to perceive environmental ambiance, which is called "Fun'iki" in Japanese. This means that we would create any "Fun'iki" by controlling surrounded auditory information actively. In this study, we tried to develop "Fun'iki" generator, which can generate any environmental ambiance by adding appropriate auditory information to the environment. To understand the relationship between auditory information and human's perception of "Fun'iki," we asked visually impaired people how they perceived and understand various environments. The results revealed that they have typical image of each situation in mind and compare this to the presented information when they perceive "Fun'iki." By adding appropriate sensory information according to their prototype in mind, arbitrary "Fun'iki" would be controlled.

  25. Development of three-dimensional virtual space synthesis method responsive to self-motion based on the mechanism of space perception(Fostering Joint International Research)

    Sakamoto Shuichi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research Fund for the Promotion of Joint International Research (Fostering Joint International Research)

    Category: Fund for the Promotion of Joint International Research (Fostering Joint International Research)

    Institution: Tohoku University

    2016 - 2019

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    We investigated how people perceive and recognize environmental space. Based on the knowledge, advanced three-dimensional virtual space synthesis method was developed. When people perceive outside environment, they integrate various sensory information inputted simultaneously. We especially focused on the effect of self-motion and auditory space perception. When listener and/or sound source are moving, auditory signals inputted to listener's ears are changing according to the relative position between them. In the experiment, we measured the detection threshold of sound source motion during the listener's linearly acceleration movement. The results suggested that sensitivity of the motion detection is degraded when listener is moving. By applying the knowledge of human auditory perception, we improved the accuracy of synthesize sound space information virtually presented by our three-dimensional auditory space synthesis method.

  26. Visualization of auditory feedback mechanism in utterance and possible functional identification of mirror neurons

    KAWASE TETSUAKI

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Challenging Exploratory Research

    Institution: Tohoku University

    2015/04/01 - 2018/03/31

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    Most movements relating to the vocalization are voluntary, but an auditory feedback plays a key role during this vocalization process. In the present study, brain activities during the vocalization tuned to the pitch of presented reference tone were examined using a time-frequency analysis of magnetoencephalography. Brain activity during the vocalization task can be visualized as ERD (event related desynchronization) of alpha and beta bands in the primary auditory cortex (Heschl’s gyrus), superior temporal gyrus, sensorimotor area, insula, supramarginal gyrus and inferior frontal gyrus along the time axis. The result shows that the brain activity during the vocalization can be dynamically visualized using time-frequency analysis of the magnetoencephalography. It would be expected that the visualizing the normal spatiotemporal pattern of cortical activity in relation to the vocalization may contribute to the elucidation of pathophysiology of functional speech disorder as stuttering.

  27. Does minute listeners' head movement affect affective aspects of human spatial hearing perception?

    SUZUKI Yoiti

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Challenging Exploratory Research

    Institution: Tohoku University

    2014/04/01 - 2017/03/31

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    This study examines the possible effects of listeners' minute head movement on the affective aspects of human spatial hearing as well as its application to the advancement of future three-dimensional (3D) auditory displays. To clarify the characteristics of spatial hearing during minute head movement, a virtual sound source with small spatial deviation was presented via a 3D auditory display. As a result, the detection thresholds of the small spatial deviation of the position of the sound source become larger (worse) than those in the case of static sound source localisation. Moreover, this phenomenon is hardly dependent on the speed of head movement. Similar phenomenon was also observed in an experiment with a real sound source. These are very interesting results with a high impact to the research field. Moreover, these results strongly suggest that the effects of minute head movement be different between sound localisation accuracy and affective evaluation of auditory spaces.

  28. 人間の外界空間認識過程に基づく自己運動感応型バーチャル視聴覚空間創成技術の確立 Competitive

    坂本 修一

    Offer Organization: 日本学術振興会

    System: 科学研究費補助金基盤研究(B)(一般)

    2014/04 - 2017/03

  29. Auditory-visual speech processing -elucidation of its brain mechanisms, pathologies and plastic changes-

    Kawase Tetsuaki, NAKASATO NOBUKAZU, KANNO AKITAKE, SAKAMOTO SHUICHI

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2012/04/01 - 2016/03/31

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    Effects of visual speech on early auditory evoked fields were examined using a helmet-shaped magnetoencephalography. Significant visual-speech effects on P50m (shortening of latency and reduction of amplitude) were observed in both hemispheres, but those on N100m were observed only in the left hemisphere. The present results may indicate that the left hemispheric dominance of lip-reading effects, which is well known at the level of the superior temporal sulcus, begins to be apparent from around the N100m level, although the lip-reading effects could be observed at the P50m level. Moreover, visual speech effects on N100m observed in the left hemisphere were maintained as long as the temporal asynchrony between A/V stimuli was within 100 ms, but not with audio lag of -500 and +500 ms; i.e., the temporal window (a limited range in which A/V perceptual binding occurs) observed in the N100m in the left hemisphere was well-correlated with that in psychophysical measurements.

  30. 笑いを誘発する音声メディアの特徴分析に基づいた笑い誘発音声フィルタの試作 Competitive

    坂本 修一

    Offer Organization: 日本学術振興会

    System: 学術研究助成基金助成金挑戦的萌芽研究

    2014/04 - 2016/03

  31. Analysis and synthesis method of phonetic/emotional information in audio-visual speech information

    SUZUKI Yo-iti, KAWASE Tetsuaki, SAKAMOTO Shuichi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Challenging Exploratory Research

    Institution: Tohoku University

    2012/04/01 - 2015/03/31

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    Moving images of a talker's face carry much information for speech understanding. Interpretation of that information is known as lip-reading. For the development of advanced multi-modal communications systems, such information should be well considered. To aim at developing such systems, we have focused on the relationship between speech sound information and moving image of talker's face. In this study, we have been particularly examining which parts of moving image of talker's face contribute most to speech understanding. We performed audio-visual speech intelligibility tests and investigated the relationship between speech intelligibility and effects of the parts of moving image of talker's face. Results of the experiments indicated that the mouth area alone provides sufficient information for speech intelligibility. The results suggested that the cue of lip-reading around the mouth might be able to generate from speech sound information.

  32. Development of high-definition 3D sound infomation sensing systems and 3D auditory displays

    SUZUKI Yo-iti, IWAYA Yukio, SAKAMOTO Shuichi, HONDA Akio, OTANI Tomoko

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (A)

    Institution: Tohoku University

    2012/04/01 - 2015/03/31

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    To aim at advancing communications technologies, this study has tackled with developing basic technologies to sense and display 3D sound space information along with accumulating knowledge on human information processing of 3D spatial hearing, which is crucial to enhance the sense of presence. As for sensing technology, we have conducted research with spherical and cylindrical microphone arrays. One main result is formulation of new representation methods of head-related functions with the arrays. As for display technology, we have formulated, for example, new display algorithm which reproduce high-definition 3D sound field information at multiple areas. Moreover, as for spatial hearing, we have found a new phenomenon that the precision of human spatial hearing becomes worse when a listener is moving both actively and passively than that when a listener is still. We also try modelling this mechanism. This finding seems effective to develop future high-definition 3D sound systems.

  33. Enrichment of audio media by means of information hiding

    NISHIMURA Ryouichi, SONODA Kotaro, SAKAMOTO Shuichi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (C)

    Institution: National Institute of Information and Communications Technology

    2011/04/28 - 2015/03/31

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    For sound field reproduction of a wide area with high precision, the number of microphones and loudspeakers required inevitably increases. In contrast, good spatial sound can be reproduced with only two channel signals in headphone listening by considering individual characteristics of listener's ears. This research focuses on this point and proposes a method to compose an audio media that is available as a 5.1 channel surround signal in loudspeaker listening and also becomes a binaural signal for the listener in headphone or earphone listening. It is shown by computer simulations and listening tests that the composed media has little difference from the original 5.1 channel surround signal with respect to both objective measures and subjective impressions. In addition, the method assures that the reproduced binaural signal in headphone listening becomes the desired one.

  34. 高度感性情報の抽出・提示を実現する視聴覚音声コミュニケーションシステムの構築 Competitive

    坂本 修一

    Offer Organization: 日本学術振興会

    System: 学術研究助成基金助成金基盤研究(C)(一般)

    2011/04 - 2014/03

  35. 軸対称型収音装置を用いた高精度・高感性バーチャル音空間創成システムの構築 Competitive

    坂本 修一

    Offer Organization: 総務省

    System: 戦略的情報通信研究開発推進制度（SCOPE）若手ICT研究者育成型研究開発

    2008/04 - 2011/03

  36. Spatiotemporal integration of multimodal sensory information

    SUZUKI Yoiti, GYOBA Jiro, KAWASE Tetsuaki, SAKURAI Kenzo, SUGITA Yoichi, IWAYA Yukio, SAKAMOTO Shuichi, MIYAUCHI Ryota, TANAKA Akihiro, YAIRI Satoshi, OTANI Makoto, KAWACHI Yosuke, KAWABATA Hideaki, KUBODERA Toshio, KOBAYASHI Maori, HIDAKA Souta, TERAMOTO Wataru, HONDA Akio

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Specially Promoted Research

    Institution: Tohoku University

    2007 - 2011

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    This research project aims at precisely describing multimodal perception from the view point of spatiotemporal event marking to build up brain computation models to describe perception of high-level kansei information such as verisimilitude, presence and naturalness for multimedia information. Based on such knowledge, this project also aims at providing quantitative design guidelines for multimedia spatiotemporal information display systems. As results of this project, we have accumulated a lot of new knowledge on multimodal spatiotemporal perception and have described human perception models of high-level kansei information. Finally, we have drawn up the quantitative design guidelines for multimedia spatiotemporal information display systems.

  37. 話者映像及び話声が含む感性情報を考慮した高精度高感性視聴覚音声提示システムの構築 Competitive

    坂本 修一

    Offer Organization: 文部科学省

    System: 科学研究費補助金若手研究(B)

    2008/04 - 2010/03

  38. Effects of audio-visual bimodal training on the perception of the cochlear implant speech simulated by the noise vocoded speech sound

    KAWASE Tetsuaki, SAKAMOTO Shuichi, KOBAYASHI Toshimitsu, NAKASATO Nobukazu

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (C)

    Institution: Tohoku University

    2007 - 2009

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    Effects of auditory training with bimodal audio-visual stimuli on mono-modal aural speech intelligibility were examined in subjects with normal hearing using highly degraded noise-vocoded speech sound. Visual cue simultaneously presented with auditory stimuli during the training session significantly improved auditory speech intelligibility not only for words used in the training session but also untrained words, when compared to the auditory training using only auditory stimuli. Visual information is generally considered to complement insufficient speech information conveyed by the auditory system during audio-visual speech perception. However, the present results revealed another beneficial effect of audio-visual training, that the visual cue enhances the auditory adaptation process to the degraded new speech sound which is different from those given in during bimodal training.

  39. 「新融合研究領域発展プロジェクト支援－取組担当課題：自己運動知覚における多感覚情報統合の解明－」 Competitive

    坂本 修一

    System: 平成19年度大学教育の国際化推進プログラム（海外先進研究実践支援）

    2007/04 - 2008/03

  40. 両耳補聴システム用低電力生体通信モジュールの開発 Competitive

    坂本 修一

    Offer Organization: 独立行政法人科学技術振興機構

    System: 研究成果活用プラザ宮城事業化可能性試験

    2006/04 - 2007/03

  41. 話者の映像及び話声の性質が高精度高感性音声提示システムに与える影響 Competitive

    坂本 修一

    Offer Organization: 文部科学省

    System: 科学研究費補助金若手研究(B)

    2005/04 - 2007/03

  42. 話者の映像及び話声の性質を考慮した高品位高感性コミュニケーションシステムの構築

    坂本 修一

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 若手研究(B)

    Institution: 東北大学

    2007 - 2007

  43. 圧縮された音楽信号の原音修復に関する研究

    鈴木 陽一, 西村 竜一, 坂本 修一

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 萌芽研究

    Institution: 東北大学

    2005 - 2007

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    本研究の目的は,音信号を圧縮することにより削除される情報を,残った情報から出来るだけ忠実に推定し,原音を修復するというものである. 本年度は主に圧縮された音信号としての劣化が比較的顕著に表れる「空間性」に着目し,「空間性」に影響を与える物理要因についての検討を行った.この物理要因が明らかとなれば,圧縮された音信号における「空間性」に関する物理要因を操作することで,原音修復が可能となると予想される. 「空間性」を操作する方法として,左右の信号の相関に着目した.時間領域上で左右の信号を段階的に加えることにより左右の信号の相関を操作し,原音と相関操作後の音について,一対比較によるSD法を用いて印象評価実験を行った.得られた結果を確認的因子分析したところ,音質の差が美的・空間因子,量的因子,明るさ因子,柔らかさ因子の4因子によって知覚されていることが分かり,音の広がりと美しさが一つの次元として知覚されることが示された.この結果は,相関を操作することにより「空間性」が何らかの影響をうけることを示す結果であるといえる.さらに,美的・空間因子や明るさ因子の得点は,音信号がステレオからモノラルに近づくにつれて低下するといった結果が得られた.この結果は,相関があがることにより音信号の「空間性」が低下することを示す結果である.すなわち,圧縮された音信号で上昇する左右信号の相関を何らかの方法で適切な値まで引き下げることにより,圧縮することにより失われた音の「空間性」を補償できる可能性を示す結果であるといえる. 来年度は,本年度明らかとなった左右音信号の相関と「空間性」の関連についてより詳細に検討し,左右音信号の相関をパラメトリックに操作することで「空間性」がどのように変化するかといった定量的な分析を行う予定である.

  44. 自己運動感覚の考慮による高感性3次元マルチモーダル空間提示システムの構築可能性

    鈴木 陽一, 行場 次朗, 西村 竜一, 坂本 修一

    Offer Organization: 日本学術振興会

    System: 科学研究費助成事業

    Category: 萌芽研究

    Institution: 東北大学

    2003 - 2004

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    本研究の目的は,聴覚情報と自己運動感覚の相互作用,視覚情報により誘起される自己運動感覚に聴覚情報が与える影響について解明し,ユーザの動きに響応して視聴覚情報,自己運動感覚情報をも適切に提示する高精度・高感性3次元マルチモーダル空間提示システムの構築可能性について検討することである. 今年度は,これまで使用してきた音空間合成システムに昨年度購入したHead Mounted Display(以下,HMD)を統合し,視聴覚情報と体性感覚情報を提示したマルチモーダル環境下での自己運動感覚の変化を主観的,客観的に分析した. まず,ブランコ状の装置に実験参加者を座らせて前後運動を提示し,その動きと同期して視聴覚刺激を左右に移動させた時に知覚される自己運動方向について分析した.実験の結果,実験参加者に知覚された自己運動方向は,視覚情報単独,もしくは,聴覚情報単独で提示された際に生じる自己運動方向の変化のベクトル合成の形で表されるという興味深い知見が得られた. 更に,この作用が実験参加者の注意の変化により影響を受けるかについて検討を進めたところ,視覚情報に注意を向けることで,自己運動方向知覚に聴覚情報が与える影響が減少するという結果が得られた.視覚においては,非注意成分を背景とする方向に自己運動方向知覚がなされるという知見が過去に得られており,今回の結果は,マルチモーダル環境下ではあるものの,非注意成分の作用が減少するという,視覚における過去の知見とは異なる結果といえる. 以上得られた知見は,3次元マルチモーダル空間提示システムを構築する上で,視覚情報のみならず,聴覚情報も整合させて提示する必要性を示唆する結果ともいえる.これまでこのような観点から3次元マルチモーダル空間提示システムの構築がなされた例は皆無であり,本知見は極めて重要であると考える.

  45. Development of the three dimensional auditory space reproduction system suited to the multi-modal environment

    SUZUKI Yoiti, GYOBA Jiro, IWAYA Yukio, NISHIMURA Ryouichi, SAKAMOTO Shuichi

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (B)

    Institution: Tohoku University

    2002 - 2004

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    When we recognize outside, we use various sensory information. This mechanism is well-known as a multi-modal information process and very crucial for developing new man-machine interfaces. We have focused on the multi-modal information process concerned with three dimensional auditory space perception. In this study, we investigated the relationship between auditory space perception and somatic information. Moreover, we developed the three dimensional auditory space reproduction system suited to the multi-modal environment. In the first experiment, we experimentally examined the effect of the head movement concerning sound localization by using virtual sound. In this experiment, some HRTFs (Head-Related Transfer Functions) were used to generate virtual sound. These HRTFs were systematically changed from the listener's original one. The results showed that the accuracy of sound localization improved by listener's head movement on all HRTFs. This suggests that somatic information is quite important for sound localization. In the next experiment, the influence of the PDR (Pressure Division Field) on binaural sound synthesis was investigated. we measured PDR by using seven headphones. The results showed that the PDR depended on both the headphone and listener's acoustical characteristics. Moreover the effects of equalizing PDR on sound localization was verified by listening experiment. Using this knowledge obtained in this study, we created a precise three dimensional spatial hearing system. As the results of listening test by using this system, we showed that this system was useful for reproduction 3 dimensional auditory space accurately.

  46. A stdudy of perception process of the three dimensional auditory space under multi-mordal informations

    SUZUKI Yoichi, SAKAMOTO Shuichi, NISHIMURA Ryouichi, GYOBA Jiro

    Offer Organization: Japan Society for the Promotion of Science

    System: Grants-in-Aid for Scientific Research

    Category: Grant-in-Aid for Scientific Research (C)

    Institution: TOHOKU UNIVERSITY

    2000 - 2001

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    This study aims to clarify how we perceive the three dimensional auditory space under somatic and visual information which are generated by listener's movement. In the first year, we experimentally examined the effect of the head movement concerning sound localization by using real sound and virtual sound. Moreover we also investigated the pattern of head movement during sound localization. The result showed that irrespective of the kind of sound source, real or virtual, both front-back confusions and localization errors were improved when listener moved their head. The amount of head movement when we heard virtual sound source was less than that when we heard real sound source. This suggests that head movement is very effective for sound localization, especially hearing virtual sound source. In the second year, we examined whether auditory information including spatial information produces self-motion. The results showed that self-motion consistent with the directions of sound movement was produced. Moreover, the amount of produced self-motion was different between the directions of sound movement. This tendency was different from that in visual vection. This suggests that we could create high-performance three dimensional spatial hearing system by effective use of visual and auditory information. From the results mentioned above, we first created a precise three dimensional spatial hearing system, and with this system, we considered the effect of head movement, and analyzed the somatic perception quantitatively. Our present research results must contribute toward the full understanding of perception of three dimensional spatial hearing under multi-modal environment.

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Teaching Experience 7

  1. 情報処理演習（共同担当）　東北大学工学部

  2. 画像と音響の科学（共同担当）　放送大学

  3. 学際情報科学論（共同担当）　東北大学大学院情報科学研究科

  4. 音響工学（共同担当）　東北大学工学部

  5. 通信信号処理（共同担当）　東北大学大学院工学研究科

  6. 音情報科学（音メディア工学）　東北大学大学院情報科学研究科，東北大学大学院工学研究科

  7. バーチャルリアリティと音（共同担当）　放送大学

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Media Coverage 2

  1. 音の臨場感鮮明に再現

    日経産業新聞

    2016/09/15

    Type: Newspaper, magazine

  2. 音の方向はっきり－補聴器に新たな雑音処理法－

    2008/01/03

    Type: Newspaper, magazine

Other 15

  1. 防災・減災情報を効果的に伝送するメッシュネットワーク型インテリジェント拡声システムの研究開発

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    屋外拡声システムの高度化を目指し，ネットワークを活用した高機能屋外音声情報通信システムを構築する

  2. 情報通信ネットワークの耐災害性強化のための研究開発－⑩多様な通信・放送手段を連携させた多層的な災害情報伝達システム研究開発－

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    防災行政無線の高度化を進める。

  3. 次世代ネットワークにおける超臨場感音響相互通信の実現

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    次世代ネットワークにおける超臨場感音響相互通信の実現に向け，日中韓の関連研究者で共同研究を進める。

  4. 「革新的な三次元映像技術による超臨場感コミュニケーション技術の研究開発」（課題エ：感性情報認知・伝達技術）

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    超臨場感を創出する要因を特定し，臨場感・超臨場感メーターを構築する。

  5. 軸対称型収音装置を用いた高精度・高感性バーチャル音空間創成システムの構築

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    軸対称型収音装置を用いた高精度・高感性バーチャル音空間創成システムを構築する．

  6. 新融合研究領域発展プロジェクト支援－取組担当課題：自己運動知覚における多感覚情報統合の解明－

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    自己運動感覚は視覚，体性感覚，前庭感覚のマルチモーダル情報処理過程として知られている．しかし近年では，聴覚情報の作用に着目され，聴覚情報が自己運動感覚に影響を与えるといった研究がわれわれの研究を含め多数示され始めている．本取組担当課題では，カナダのMcGill大学に設置された3次元モーションプラットホームを離床し，音情報と自己運動感覚の統合処理過程を探る．

  7. 多数マイクロホンを用いたバーチャル収音・再生システムの開発

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    遠隔地の音空間忠実再生実現のため，多数マイクロホンを有するオブジェクトを用いた音空間収音・再生手法を構築する．

  8. 両耳補聴システム用低電力生体通信モジュールの開発

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    両耳補聴システムにおける両耳間の補聴器の無線通信を念頭に，低電力生体通信モジュールの適用可能性を探る．

  9. 音情報の高信頼高品質ネットワーク通信技術の開発

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    ネットワークを介して安全に音情報を通信するための基盤技術を開発する．

  10. 話速変換音声が情報受容に与える影響に関する研究

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    話速変換音声のテレビ応用を念頭に，話者映像と話速変換音声との統合過程の解明を行う．

  11. 視聴覚情報統合型話速変換処理システムの構築

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    話者映像による読唇情報と話速変換音声を組み合わせた，高齢者にやさしい音声コミュニケーションシステムを構築する．

  12. 高精度聴覚ディスプレイ技術を用いた視覚障害者用訓練機器の開発

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    聴覚ディスプレイ技術を基本とし，視覚障害者に対する空間認識訓練システムを構築する．

  13. インテリジェントユニバーサルコミュニケーションに関する研究

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    圧電素子を用いた骨伝導デバイスをベースとして，高齢者などの情報弱者を念頭にしたユニバーサルコミュニケーションシステムを開発する．

  14. 単語親密度を統制した単語了解度による補聴器適合評価

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    補聴器のより実生活に近い適合評価指標の構築を目指し，単語親密度を統制した単語了解度試験用単語リストを作成し，その有効性を検証する．

  15. 難聴者の聴覚特性の評価と補償手法の開発

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    両耳分離聴や選択的両耳聴能など，人間の持つ両耳相互作用と，ディジタル信号処理とを組み合わせて，次世代ディジタル補聴器の基盤技術の開発を行う．

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