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Updated: Jul 2, 2025
09:58
Investigating the Three-dimensional Flow Separation Induced by a Model Vocal Fold Polyp
Published on: February 3, 2014
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Nonlinear dynamics and chaos in a vocal-ventricular fold system
Takumi Inoue1, Kota Shiozawa1, Takuma Matsumoto1
1Graduate School of Science and Engineering, Ritsumeikan University, Noji-higashi, Kusatsu, Shiga 525-8577, Japan.
Chaos (Woodbury, N.Y.)
|February 22, 2024
Summary
Ventricular folds vibrate with vocal folds during singing or pathology. Nonlinear dynamics reveal coupled oscillator behaviors, aiding diagnosis of voice disorders like ventricular fold dysphonia.
Area of Science:
- Biomechanics
- Voice production
- Nonlinear dynamics
Background:
- Ventricular folds are superior to vocal folds in humans.
- They can vibrate with vocal folds during singing or voice pathology.
- Physical models offer a framework for studying vocalization biomechanics.
Purpose of the Study:
- Analyze experimental data from physical models of vocal and ventricular folds.
- Investigate co-oscillations and irregular dynamics in vocal fold systems.
- Apply nonlinear dynamics to understand voice production mechanisms.
Main Methods:
- Experimental analysis of physical models of vocal and ventricular folds.
- Application of nonlinear dynamics principles.
- Modeling the system as two coupled oscillators.
Main Results:
- Observed various cooperative behaviors in coupled vocal and ventricular fold models.
- Identified synchronized oscillations with 1:1 or 1:2 frequency ratios.
- Documented desynchronized oscillations exhibiting torus or chaotic dynamics.
Conclusions:
- The vocal fold system can be modeled as coupled oscillators.
- Nonlinear dynamics explain complex vibrational patterns, including irregular dynamics.
- Findings support the diagnosis of voice pathologies like ventricular fold dysphonia.
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