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Improving intelligibility of bone-conducted headphones in noisy enviroment

Research Project

Project/Area Number 18K18081
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 61010:Perceptual information processing-related
Research InstitutionKyushu University (2020)
National Institute of Technology(KOSEN), Oshima College (2018-2019)

Principal Investigator

Murakami Yasuki  九州大学, 芸術工学研究院, 助教 (90779646)

Project Period (FY) 2018-04-01 – 2021-03-31
Project Status Completed (Fiscal Year 2020)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2020: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2019: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2018: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords骨伝導 / 耳音響放射 / 了解度 / 聴覚モデル / 数値シミュレーション / 骨伝導音 / 骨導音 / 蝸牛 / 非線形応答 / 聴覚マスキング / 音声強調 / 騒音 / 音声コミュニケーション
Outline of Final Research Achievements

The purpose of this study was to improve the intelligibility of bone conduction sound, which can realize safe work in noisy environments. The experiment consisted of three items: subjective evaluation of the bone conduction sound in a noisy environment, objective evaluation by a non-invasive physiological experiment on a human subject, and a study using a numerical simulation. The results of the subjective and objective evaluations suggest that the sound presented by the bone-conduction sound is easly masked by noise. The results obtained from the numerical simulation supported these two evaluation experiments.

Academic Significance and Societal Importance of the Research Achievements

安全な作業を実現することは社会にとって重要な課題である。骨伝導ヘッドフォンはその一助となる技術であるが、骨伝導音の伝搬経路や知覚メカニズムが分かっていないため、十分に社会で実用化されていない。本研究では、気導音に対して骨伝導音がマスキングされやすい傾向にあることを心理実験、生理実験、および数値シミュレーションを通じて明らかにした。この研究成果を発展させることで、騒音に頑健で明瞭性の高い骨伝導ヘッドフォンの実現が見込まれる。

Report

(4 results)
  • 2020 Annual Research Report   Final Research Report ( PDF )
  • 2019 Research-status Report
  • 2018 Research-status Report
  • Research Products

    (10 results)

All 2021 2020 2019 2018

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (7 results) (of which Int'l Joint Research: 3 results)

  • [Journal Article] Efficiency limit of nonuniform grid setting in two-dimensional cochlear model2019

    • Author(s)
      Murakami Yasuki
    • Journal Title

      Acoustical Science and Technology

      Volume: 40 Issue: 5 Pages: 336-343

    • DOI

      10.1250/ast.40.336

    • NAID

      130007700258

    • ISSN
      0369-4232, 1346-3969, 1347-5177
    • Year and Date
      2019-09-01
    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Simple oscillator model of frequency dependence of cochlear two-tone suppression2018

    • Author(s)
      Murakami Yasuki
    • Journal Title

      Acoustical Science and Technology

      Volume: 39 Issue: 3 Pages: 226-233

    • DOI

      10.1250/ast.39.226

    • NAID

      130006730822

    • ISSN
      0369-4232, 1346-3969, 1347-5177
    • Year and Date
      2018-05-01
    • Related Report
      2018 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Influence of discretization error on instability of cochlear model2018

    • Author(s)
      Murakami Yasuki
    • Journal Title

      The Journal of the Acoustical Society of America

      Volume: 144 Issue: 6 Pages: 3593-3602

    • DOI

      10.1121/1.5083836

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Presentation] Investigating of the Direction of Suppression in Distortion Product Otoacoustic Emissions2021

    • Author(s)
      Takumi Fuji, Yasuki Murakami, Takashi Asakawa
    • Organizer
      ARO The 44th Annual MidWinter Meeting
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] DPOAE を用いた蝸牛での抑圧現象の方向性の検証2020

    • Author(s)
      藤匠海, 村上泰樹, 浅川貴史
    • Organizer
      日本音響学会秋季研究発表会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 歪成分耳音響放射を用いた気導音と骨導音の入出力特性の比較2020

    • Author(s)
      福田寿弥, 村上泰樹
    • Organizer
      日本機械学会中国四国支部学生卒業研究発表会
    • Related Report
      2019 Research-status Report
  • [Presentation] Simulation of cochlear response by bone conducted tone2019

    • Author(s)
      Yasuki Murakami
    • Organizer
      The 23rd International Congress on Acoustics
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] 骨導音と気導音に対する蝸牛モデルの入出力特性の比較2019

    • Author(s)
      村上泰樹
    • Organizer
      日本音響学会秋季研究発表会
    • Related Report
      2019 Research-status Report
  • [Presentation] Simulation of cochlear responses by bone-conducted tone2019

    • Author(s)
      Yasuki Murakami
    • Organizer
      International Congress on Acoustics 2019
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 有限差分法に基づく2 次元蝸牛メカニクスの状態空間モデルとその高精度化2018

    • Author(s)
      村上泰樹
    • Organizer
      日本音響学会2018年秋季研究発表会
    • Related Report
      2018 Research-status Report

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Published: 2018-04-23   Modified: 2022-06-22  

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