Third International Workshop on Models and Analysis of Vocal Emissions for Biomedical Applications (MAVEBA 2003)

Florence, Italy
December 10-12, 2003

Numerical Modelling of Leakage-Flow-Induced Vibrations of Human Vocal Folds with Hertz Impact Forces

Jaromír Horáček (1), P. Šidlof (1), J. G. Švec (2,3)

(1) Institute of Thermomechanics, Academy of Sciences of the Czech Republic, Prague, Czech Republic
(2) National Center for Voice and Speech, The Denver Center for the Performing Arts, Denver, USA
(3) Medical Healthcom, Ltd., Centre for Communication Disorders, Prague, Czech Republic

Mathematical model of the vocal folds self-oscillations excited by aeroelastic mechanism is presented. A two-degrees-of-freedom element on an elastic foundation with a generally defined shape vibrating in the glottal airflow approximates the vocal fold. The Hertz impact model is considered for the contact forces during the vocal folds collisions. The model's vibratory patterns and resulting flow values are similar to those of the real vocal folds. The model is expected to be helpful in design of artificial voice prosthesis.

Index Terms. Biomechanics of voice, aeroelastic instabilities, flutter, divergence, post-critical behaviour of the aeroelastic system, nonlinear vibrations, impact oscillator.

Full Paper (reprinted with permission from Firenze University Press)

Bibliographic reference.  Horáček, Jaromír / Šidlof, P. / Švec, J. G. (2003): "Numerical modelling of leakage-flow-induced vibrations of human vocal folds with Hertz impact forces", In MAVEBA-2003, 143-146.