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

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F15%3A00444105" target="_blank" >RIV/61388998:_____/15:00444105 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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 simplifiedhuman 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.

Název v anglickém jazyce

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

Popis výsledku anglicky

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 simplifiedhuman 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.

Druh

O - Ostatní výsledky

CEP obor

BI - Akustika a kmity

OECD FORD obor

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Projekt

<a href="/cs/project/GAP101%2F12%2F1306" target="_blank" >GAP101/12/1306: Biomechanické modelování tvorby lidského hlasu - cesta k umělým hlasivkám</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2015

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů