Numerical Simulation of the Self-Oscillations of the Vocal Folds and of the Resulting Acoustic Phenomena in the Vocal Tract

0380634 - ÚT 2013 RIV NL eng C - Konferenční příspěvek (zahraniční konf.)
Švancara, Pavel - Horáček, Jaromír - Švec, J. G.
Numerical Simulation of the Self-Oscillations of the Vocal Folds and of the Resulting Acoustic Phenomena in the Vocal Tract.
Advances in Mechanisms Design. Vol. 8. Dordrecht: Springer, 2012 - (Beran, J.; Bílek, M.; Hejnová, M.; Žabka, P.), s. 357-363. ISBN 978-94-007-5124-8. ISSN 2211-0984.
[International Conference on the Theory and Mechanisms /11./. Liberec (CZ), 04.09.2012-06.09.2012]
Grant CEP: GA ČR GAP101/12/1306
Výzkumný záměr: CEZ:AV0Z20760514
Klíčová slova: FE model * vocal-fold motion * Navier-Stokes equation
Kód oboru RIV: BI - Akustika a kmity

The study presents a 3D finite element (FE) model of the flow-induced self-oscillation of the human vocal folds in interaction with acoustics of simplified vocal tract models. The 3D vocal tract models of the acoustics spaces shaped for simulation of phonation of Czech vowels [a:], [i:] and [u:] were created by converting the data from the magnetic resonance images (MRI). For modelling of the fluid-structure interaction, explicit coupling scheme with separated solvers for fluid and structure domain was utilized. The FE model comprises vocal folds pretension before starting phonation, large deformation of the vocal-fold collisions, fluid-structure interaction, morphing the fluid mesh according to the vocal-fold motion, unsteady viscous airflow described by the Navier-Stokes equations and airflow separation. The developed FE model enables to study the relationship between flow-induced vibrations of the vocal folds and acoustic wave propagation in the vocal tract and can also be used to simulate for example pathological changes in the vocal fold tissue and their influence on the voice production.
Trvalý link: http://hdl.handle.net/11104/0211290