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A Computational Study of Vocal Fold Dehydration During Phonation
IEEE Transactions on Bio-Medical Engineering
|April 10, 2017
Summary
Vocal fold vibration can cause significant dehydration, impacting voice function. Localized dehydration within vocal folds, even with low overall dehydration, can negatively affect tissue properties and voice production.
Area of Science:
- Biomechanics
- Acoustic Science
- Physiology
Background:
- Vocal fold dehydration is linked to vocal fatigue.
- The impact of vocal fold vibration alone on dehydration is not fully understood.
Purpose of the Study:
- To model and investigate vocal fold systemic and surface dehydration during phonation.
- To determine the relationship between vibration, tissue properties, and dehydration.
Main Methods:
- Developed a 3D model based on linear poroelastic theory.
- Simulated water transport, resupply, and surface fluid dynamics.
- Conducted parametric studies on permeability and vibration conditions.
Main Results:
- Dehydration increases with vibration amplitude, epithelial permeability, and reduced water resupply.
- Large-amplitude vibration can cause up to 3% systemic dehydration.
- Localized dehydration exceeding 5% occurred even with <1% overall dehydration.
Conclusions:
- Vocal fold vibration can induce significant systemic and local dehydration.
- Surface dehydration is not a reliable indicator of systemic vocal fold dehydration.
- High local dehydration can negatively impact vocal fold function and voice quality.