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Development of new aerodynamic testing methods for evaluating the dependency ration of loud vocalization on laryngeal resistance and expiratory effort

Research Project

Project/Area Number 21K16857
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 56050:Otorhinolaryngology-related
Research InstitutionOsaka University

Principal Investigator

UMATANI MASANORI  大阪大学, 大学院医学系研究科, 特任研究員 (00804353)

Project Period (FY) 2021-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2023: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2022: ¥260,000 (Direct Cost: ¥200,000、Indirect Cost: ¥60,000)
Fiscal Year 2021: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Keywords呼気努力 / 喉頭抵抗 / 胸腔内圧 / 腹腔内圧 / 皮膚加速度レベル / 大声
Outline of Research at the Start

大声発声は音声障害の主たる原因であるが、発症リスクには個人差がある。この個人差は、声の大きさの増大を呼気努力と喉頭抵抗のいずれに優位に依存するのかに依存することが仮定される。
本研究では、音圧計・加速度計・マノメトリー・電気声門図・発声機能検査を用いることで、①健常者・音声障害患者におけるクレシェンド課題遂行時の音圧増大の上記2因子への依存度のバランスの実態、②ハミングを用いた音声訓練のバランスへの即時的影響と長期的効果、③公立学校教師における嗄声の有無間でのバランスの相違、を検討する。本研究は、音声障害発症の高リスク者のスクリーニング、音声障害発症予防のための訓練法の開発に繋がる可能性を持つ。

Outline of Final Research Achievements

To use manometry, expiratory effort can be evaluated. Also use accelerometer and manometry, and a vocal function testing device allowed us to evaluate continuous changes in voice intensity and airflow during crescendo vocalization.
In addition, in successful cases of crescendo vocalization, significant differences were observed in both the thoracic esophageal pressure and the gastric pressure at the peak of inspiration immediately before vocalization, at the time of vocalization, and at the peak of the sound pressure level during vocalization. However, in the failed cases, the sound pressure level when starting the voice was high.
It was also revealed that there are intra-individual and inter-individual differences in expiratory effort.

Academic Significance and Societal Importance of the Research Achievements

消化管マノメトリーを用いることで、呼気努力の評価が可能であり、呼気努力の評価方法の一つとして、消化管マノメトリーの有用性を証明しえた。
クレシェンド発声では、発声直前吸気時、起声時、発声中で、胸部食道内圧および胃内圧の両方に圧差を認めており、胸腹部を用いた発声を行っていることが証明された。
また、母音クレシェンドでは、呼気努力の様式の個人内差違、および個人間差違が存在したことも明らかとなった。

Report

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

    (3 results)

All 2023 2022

All Journal Article (3 results) (of which Peer Reviewed: 3 results)

  • [Journal Article] Skin acceleration levels estimated by a neck-surface accelerometer during phonation are affected by the tension of the anterior cervical skin.2023

    • Author(s)
      Umatani M, Ogawa M, Hosokawa K, Kato C, Iwahashi T, Inohara H.
    • Journal Title

      Journal of Voice

      Volume: - Issue: 4 Pages: 00111-9

    • DOI

      10.1016/j.jvoice.2021.03.016

    • Related Report
      2022 Research-status Report 2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] The Feasibility of Gastroesophageal Manometry for Continuously Evaluating the Degree of Expiratory Effort During Successful Crescendo Phonation2023

    • Author(s)
      Umatani Masanori、Ogawa Makoto、Hosokawa Kiyohito、Kato Chieri、Okajima Eri、Iwahashi Toshihiko、Inohara Hidenori
    • Journal Title

      Journal of Voice

      Volume: 37 Issue: 3 Pages: 470.e7-470.e16

    • DOI

      10.1016/j.jvoice.2021.02.001

    • Related Report
      2022 Research-status Report 2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] The feasibility of a neck-surface accelerometer for estimating the amount of acoustic output during phonation regardless of the existence of anterior vocal tract narrowing.2022

    • Author(s)
      (33)Umatani M, Ogawa M, Hosokawa K, Kato C, Iwahashi T, Inohara H.
    • Journal Title

      Journal of Voice

      Volume: 36 Issue: 3 Pages: 297-308

    • DOI

      10.1016/j.jvoice.2020.06.002

    • Related Report
      2022 Research-status Report
    • Peer Reviewed

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Published: 2021-04-28   Modified: 2025-01-30  

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