Finite Element Modelling of the Effect of Stiffness and Damping of Vocal Folds Layers on their Vibrations and Produced Sound

0444105 - ÚT 2016 RIV CZ eng A - Abstrakt
Hájek, P. - Švancara, P. - Horáček, Jaromír - Švec, J. G.
Finite Element Modelling of the Effect of Stiffness and Damping of Vocal Folds Layers on their Vibrations and Produced Sound.
Engineering Mechanics 2015. Praha: Institute of Theoretical and Applied Mechanics ASCR, v. v. i, 2015 - (Náprstek, J.; Fischer, C.). s. 78-79. ISBN 978-80-86246-42-0. ISSN 1805-8248.
[Engineering mechanics 2015 /21./. 11.05.2015-14.05.2015, Svratka]
Grant CEP: GA ČR(CZ) GAP101/12/1306
Institucionální podpora: RVO:61388998
Klíčová slova: biomechanics of voice * simulation of phonation * fluid-structure-acoustic interaction * finite element method
Kód oboru RIV: BI - Akustika a kmity

The study presents a two-dimensional (2D) finite element (FE) model of the fluid-stucture-acoustic interaction during self-sustained oscillation of the human vocal folds (VF). The FE model combines the FE models of the VF, the trachea and the simplified human vocal tract shaped for phonation of Czech vowel [a:]. The developed FE model comprises large deformations of the VF tissue, VF contact, fluid-structure interaction, morphing the fluid mesh according to the VF motion (Arbitrary Lagrangian-Euler approach), solution of unsteady viscous compressible airflow described by the Navier-Stokes equations and airflow separation during the glottis closure. The effect of stiffness and damping of lamina propria on VF vibrations and produced sound are analyzed. Such variation of the lamina propria properties can be caused by certain VF pathologies such as sulcus vergeture.
Trvalý link: http://hdl.handle.net/11104/0247017