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Study on transmission process of one's own voice through air- and bone-conduction pathways

Research Project

Project/Area Number 21K21314
Research Category

Grant-in-Aid for Research Activity Start-up

Allocation TypeMulti-year Fund
Review Section 1002:Human informatics, applied informatics and related fields
Research InstitutionUniversity of Yamanashi (2023)
Kanazawa University (2021-2022)

Principal Investigator

Toya Teruki  山梨大学, 大学院総合研究部, 特任助教 (00911223)

Project Period (FY) 2021-08-30 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000)
Fiscal Year 2022: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2021: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords聴覚フィードバック / 気導音声 / 骨導音声 / 自己聴取音 / 伝達特性 / 自己聴取音声 / 側頭部振動 / 外耳道内放射
Outline of Research at the Start

発話者は,自ら発した音声を自ら知覚する「聴覚フィードバック」により,種々の音環境下で円滑な発話を継続できる.自己聴取音声は気導・骨導という二種類の経路により伝達されるため,聴覚フィードバック機構の解明には気導・骨導の両経路による伝達過程の理解が不可欠である.従来知見では気導経路による音声伝達過程をベースに聴覚フィードバック機構の説明が試みられている一方,骨導経路での音声伝達過程については統一的な理解に至っていない.そこで本研究では,骨導伝達系の有する伝達特性を明らかにするとともに,気導・骨導経路の各々の知覚的寄与を明らかにする.

Outline of Final Research Achievements

This study attempted to clarify the transmission process of one's own perceived voice through air-conducted (AC) and bone-conducted (BC) pathways. (1) Measurement of the frequency characteristics of the BC pathway from the speech organ to the auditory organ using actual vocalizations and artificial sound excitation. (2) The perceptual contributions of the AC and BC pathways were estimated by simulating BC speech spectrum using the transmission characteristics obtained.
The results showed that (1) the BC pathway reaching the middl/inner ear and that radiating sounds into the ear canal had different transmission characteristics, and (2) the AC and total BC pathways had almost equal contribution to the own-voice perception, while the BC pathway radiating sounds into the ear canal had a larger contribution in comparison with the other BC pathway. Those findings suggest the role of BC speech perception on the auditory feedback.

Academic Significance and Societal Importance of the Research Achievements

発話者が自ら発した音声を自ら知覚する「聴覚フィードバック」という機構の存在が知られている.これまで,骨導音観測の難しさ等から,聴覚フィードバックにおける骨導音声知覚の役割は未解明であった.本研究では,骨導音の物理計測に加え,過去の生理学的知見等から自己聴取音伝達経路を仮定し,情報科学的なアプローチで自己聴取音知覚における骨導経路の役割を推測できた.得られた知見は,骨導聴取技術を用いた新しい発話支援等に応用できることが期待される.

Report

(4 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • Research Products

    (3 results)

All 2022 2021

All Presentation (3 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Presentation] Subjective evaluation regarding mixing ratio of bone-conducted to air-conducted speech for own-voice perception2022

    • Author(s)
      Teruki Toya, peter Birkholz, Masashi Unoki
    • Organizer
      24th International Congress on Acoustics
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] 遮音壁による気導音遮断の下での骨導音声の伝達特性の測定2021

    • Author(s)
      鳥谷輝樹,BIRKHOLZ Peter,鵜木祐史
    • Organizer
      日本音響学会聴覚研究会
    • Related Report
      2021 Research-status Report
  • [Presentation] 発話時の骨導伝達特性の測定における気導音遮断の検討2021

    • Author(s)
      鳥谷輝樹,BIRKHOLZ Peter,鵜木祐史
    • Organizer
      日本音響学会2021年秋季研究発表会
    • Related Report
      2021 Research-status Report

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Published: 2021-10-22   Modified: 2025-01-30  

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