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[Non-linear model of glottic vibration. Potential clinical implications]
A Giovanni1, M Ouaknine, R Garrel
1Laboratoire d'Audio-Phonologie Clinique de l'Université de la Méditerranée, UPRES-EA 2668, Faculté de Médecine de Marseille. agiovann@ap-hm.fr
Revue De Laryngologie - Otologie - Rhinologie
|May 14, 2003
Summary
This study explores the physics of vocal fold vibration, revealing non-linear dynamics crucial for voice production. A new Slip-Stick model captures these complex vocal fold behaviors for better understanding of phonation.
Area of Science:
- Physics of biological systems
- Acoustic phonetics
- Myo-elastic aerodynamic voice production theory
Context:
- Vocal fold vibration is fundamental to voice production.
- Existing models often simplify the complex physics involved.
- Understanding non-linear dynamics is key to explaining voice phenomena.
Purpose:
- To investigate the physical laws governing glottic vibration.
- To explore the role of non-linearity in vocal fold dynamics.
- To propose a novel model for vocal fold vibration.
Summary:
- Glottic vibration follows physical laws, including non-linear ones related to energy exchange between expired air and vocal folds.
- These non-linearities are critical for understanding the phonatory threshold and vocal cord synchronization.
- A mixed linear and non-linear model, termed Slip-Stick, is proposed based on experimental data, similar to Van der Pol oscillators.
Impact:
- Provides a more accurate physical model for voice production.
- Enhances understanding of voice disorders related to vocal fold dynamics.
- Offers new insights into the fundamental mechanisms of phonation.