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Updated: Jul 1, 2025
09:58
Investigating the Three-dimensional Flow Separation Induced by a Model Vocal Fold Polyp
Published on: February 3, 2014
8.5K
Restraining vocal fold vertical motion reduces source-filter interaction in a two-mass model.
Tsukasa Yoshinaga1, Zhaoyan Zhang2, Akiyoshi Iida3
1Graduate School of Engineering Science, Osaka University, Toyonaka, Osaka 560-8531, Japan.
JASA Express Letters
|March 1, 2024
Summary
Vocal fold vertical motion influences voice production. Allowing this motion causes subharmonic vibrations, while restricting it suppresses this effect, suggesting vertical mobility regulates voice source-filter interaction.
Area of Science:
- Acoustics
- Biomechanics
- Speech Science
Background:
- Experimental studies suggest vocal fold vertical motion impacts voice source-filter coupling.
- Understanding this interaction is crucial for voice production and pathology research.
Purpose of the Study:
- To systematically investigate the effects of vocal fold vertical motion on source-filter interaction.
- To determine the role of vocal fold vertical mobility in regulating voice production dynamics.
Main Methods:
- Utilized a two-dimensional two-mass model of the vocal folds.
- Coupled the vocal fold model to a compressible flow simulation.
- Compared simulations with and without vertical vocal fold motion.
Main Results:
- Vocal folds exhibited subharmonic vibration when vertical motion was allowed, due to entrainment to vocal tract resonance.
- Restraining vertical motion suppressed the subharmonic vibration and entrainment.
- Vertical mobility directly influences the coupling between the voice source and vocal tract.
Conclusions:
- Vocal fold vertical mobility plays a significant role in regulating source-filter interaction during voice production.
- The findings provide insights into the biomechanical mechanisms underlying voice acoustics and potential voice disorders.
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