MIZUMACHI Mitsunori

写真a

Title

Associate Professor

Laboratory

1-1 Sensui-cho, Tobata-ku, Kitakyushu-shi, Fukuoka

Research Fields, Keywords

Acoustic information science, acoustic signal processing

E-mail

E-mail address

Undergraduate Education 【 display / non-display

  • 1995.03   Kyushu Institute of Design   Faculty of Art and Technology   Department of Acoustic Design   Graduated   JAPAN

Post Graduate Education 【 display / non-display

  • 2000.03  Japan Advanced Institute of Science and Technology  Graduate School, Division of Information Science  Department of Information Processing  Doctoral Program  Completed  JAPAN

Degree 【 display / non-display

  • Japan Advanced Institute of Science and Technology -  Ph.D. in Information Science  2000.03

  • Japan Advanced Institute of Science and Technology -  Master  1997.03

Biography in Kyutech 【 display / non-display

  • 2010.12
    -
    Now

    Kyushu Institute of TechnologyFaculty of Engineering   Department of Electrical Engineering and Electronics   Associate Professor  

Biography before Kyutech 【 display / non-display

  • 2000.04
    -
    2004.06

    Advanced Telecommunications Research Institute International (ATR)   Researcher   JAPAN

Academic Society Memberships 【 display / non-display

  • 2005.04
    -
    Now
     

    The institue of electronics, information and communication engineers (IEICE)  JAPAN

  • 2005.04
    -
    Now
     

    Acoustical Society of Japan  JAPAN

  • 2004.04
    -
    Now
     

    The Institute of Electrical and Electronics Engineering (IEEE)  UNITED STATES

  • 2004.04
    -
    Now
     

    The Acoustic Society of America  UNITED STATES

Specialized Field (scientific research fund) 【 display / non-display

  • Perceptual information processing

 

Publications (Article) 【 display / non-display

  • Frequency domain variant of velvet noise and its application to acoustic measurements

    H. Kawahara, K. Sakakibara, M. Mizumachi, H. Banno, M. Morise, and T. Irino

    Proc. APSIPA ASC 2019      2019.11  [Refereed]

  • Neural Network-based Broadband Beamformer with Less Distortion

    M. Mizumachi

    Proc. International Congress on Acoustics (ICA 2019)      2019.09  [Refereed]

    repository

  • Neural network-based direction-of-arrival estimation with cross correlation function

    Mizumachi M., Okita K.

    Proceedings of the 26th International Congress on Sound and Vibration, ICSV 2019      2019.07  [Refereed]

     View Summary

    © Proceedings of the 26th International Congress on Sound and Vibration, ICSV 2019. All rights reserved. Direction-of-arrival (DOA) estimation has been one of the important issues in acoustic signal processing. It is well known that the DOA can be estimated based on the cross correlation with stereo observations. It is, however, difficult to accurately estimate the DOA because the cross correlation-based function could not yield the sharp spatial feature. On the other hand, the multiple signal classification (MUSIC) algorithm provides the pointed spatial feature but it requires the exact number of sound sources in advance. In this paper, the cross correlation-based spatial feature is sharpened using a neural network. The neural network is trained using the cross correlation-based spatial feature calculated from the stereo observations and the binary teacher signals. It is confirmed that the non-linear cross correlation-based spatial feature has an extremely sharp peak at the direction of the target sound source without the information on the number of sound sources

    Scopus

  • Performance evaluation of a neural network-based beamformer with a small-scale microphone array

    Inter-noise      2019.06  [Refereed]

  • Proposal of power-saving audio playback algorithm based on auditory masking

    Nakashima T., Nakagawara M., Mizumachi M.

    AES 146th International Convention      2019.03  [Refereed]

     View Summary

    © 2019 The Audio Engineering Society (AES). All rights reserved. Power consumption is an important issue while listening to music using portable audio devices. The authors have previously proposed a power-saving audio playback algorithm, which has adjusted filter-bank outputs according to our auditory characteristics. It succeeds in reducing power consumption but causes perceptual distortion. In this paper, the power-saving audio playback algorithm is improved based on auditory masking, which attenuates audio components below the masking threshold. As a result of a listening test, it is confirmed that the proposed method is subjectively superior to the previous method with the same power consumption.

    Scopus

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Publications (Books) 【 display / non-display

  • 音響キーワードブック

    日本音響学会 編 ( Joint Work ,  音環境理解 )

    コロナ社  2016.03 ISBN: 978-4-339-00880-7

Conference Prsentations (Oral, Poster) 【 display / non-display

  • Individual interaction between hearing and speaking due to aging

    Mitsunori Mizumachi

    Meeting of the Acoustical Society of America  2015.11  -  2015.11 

  • 車室内における雑音の定常性と音声了解度の関係

    詫間翔大, 堀川智帆, 水町光徳

    日本音響学会2015年春季研究発表会  2015.03  -  2015.03  日本音響学会

  • 騒音環境下における数字読み上げ音声の桁数と了解度の関係

    堀川智帆, 詫間翔大, 水町光徳

    日本音響学会2015年春季研究発表会  2015.03  -  2015.03  日本音響学会

  • Change of Static Characteristics of Japanese Word Utterances with Aging

    Mitsunori Mizumachi

    Meeting of the Acoustical Society of America  2014.10  -  2014.10 

  • 加齢による聴覚と発話の相互作用

    水町光徳

    福祉情報工学研究会  2013.10  -  2013.10 

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Activities of Academic societies and Committees 【 display / non-display

  • 2017.06
    -
    2019.05

    Acoustical Society of Japan  

  • 2017.06
    -
    2019.05

    Acoustical Society of Japan  

  • 2017.06
    -
    2018.05

    Acoustical Society of Japan  

  • 2017.06
    -
    2018.05

    The institue of electronics, information and communication engineers (IEICE)  

  • 2016.06
    -
    2017.05

    The institue of electronics, information and communication engineers (IEICE)  

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