2023 Fiscal Year Final Research Report
Analysis on fluid-structure-acoustic interaction of vocal fold vibration and sound generation
| Project/Area Number |
20K14648
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 19010:Fluid engineering-related
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| Research Institution | Osaka University (2023)
Toyohashi University of Technology (2020-2022) |
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Principal Investigator |
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| Project Period (FY) |
2020-04-01 – 2024-03-31
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| Keywords | 声帯 / 空力音 / 流体構造連成 / 自励振動 / 数値流体解析 / 発声 / 有限差分法 / 人工声帯 |
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| Outline of Final Research Achievements |
In this research, we developed a high-order accuracy numerical analysis for voice production of vocal fold vibrations. We have shown that the proposed methodology can predict the voice quality with sufficient accuracy compared to experimental results, by using a high-order accuracy finite difference method for the airflow and sound generation and vocal fold modeling with a one-dimensional dynamic beam equation or lumped-mass models. Comparison with the conventional one-dimensional airflow model revealed to what extent the three-dimensional airflow and pressure distributions around the vocal folds affect the vocal fold vibration characteristics.
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| Free Research Field |
空力音響学
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| Academic Significance and Societal Importance of the Research Achievements |
声帯から声が発せられる際には，気流と声帯の振動の連成だけでなく，気流から発生する音との連成も考慮する必要がある．本研究で構築した手法では，振動する声帯ひだから音が発生する現象だけでなく，発生した音が声帯振動に及ぼす現象までモデル化できており，工学的な応用先として，より音質の良い人工声帯の開発に活かせるだけでなく，将来的には声帯機能不全による発声障害の原因究明などにも活用できる．
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