Influence of tissue changes in superficial lamina propria on production of Czech vowels

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F19%3A00506030" target="_blank" >RIV/61388998:_____/19:00506030 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61989592:15310/19:73595250 RIV/00216305:26210/19:PU132229

Výsledek na webu

<a href="http://dx.doi.org/10.21495/71-0-141" target="_blank" >http://dx.doi.org/10.21495/71-0-141</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.21495/71-0-141" target="_blank" >10.21495/71-0-141</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Influence of tissue changes in superficial lamina propria on production of Czech vowels

Popis výsledku v původním jazyce

Superficial lamina propria (SLP) is a water-like vocal fold (VF) layer located directly under overlying epithelium. Its material properties affect VF motion and thus resulting spectrum of produced sound. Influence of stiffness and damping of the SLP on sound spectrum of Czech vowels is examined using a two-dimensional (2D) finite element (FE) model of a human phonation system. The model consists of the VF (structure model) connected with an idealized trachea and vocal tract (VT) (fluid models). Five VTs for all Czech vowels [a:], [e:], [i:], [o:] and [u:] were used and their geometry were based on MRI data. Fluid flow in the trachea and VT was modelled by unsteady viscous compressible Navier-Stokes equations. Such a formulation enabled numerical simulation of a fluid-structure-acoustic interaction (FSAI). Self-sustained oscillations of the VF were described by a momentum equation including large deformations and a homogeneous linear elastic model of material was used. Fluid and structure solvers exchange displacements and boundary forces in each iteration. During closed phase VFs are in contact and fluid flow is separated. We can observe that both the damping and the stiffness of the SLP substantially influence the amplitude and frequency of VFs vibration as well as the open time of the glottis.n

Název v anglickém jazyce

Influence of tissue changes in superficial lamina propria on production of Czech vowels

Popis výsledku anglicky

Superficial lamina propria (SLP) is a water-like vocal fold (VF) layer located directly under overlying epithelium. Its material properties affect VF motion and thus resulting spectrum of produced sound. Influence of stiffness and damping of the SLP on sound spectrum of Czech vowels is examined using a two-dimensional (2D) finite element (FE) model of a human phonation system. The model consists of the VF (structure model) connected with an idealized trachea and vocal tract (VT) (fluid models). Five VTs for all Czech vowels [a:], [e:], [i:], [o:] and [u:] were used and their geometry were based on MRI data. Fluid flow in the trachea and VT was modelled by unsteady viscous compressible Navier-Stokes equations. Such a formulation enabled numerical simulation of a fluid-structure-acoustic interaction (FSAI). Self-sustained oscillations of the VF were described by a momentum equation including large deformations and a homogeneous linear elastic model of material was used. Fluid and structure solvers exchange displacements and boundary forces in each iteration. During closed phase VFs are in contact and fluid flow is separated. We can observe that both the damping and the stiffness of the SLP substantially influence the amplitude and frequency of VFs vibration as well as the open time of the glottis.n

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

10307 - Acoustics

Projekt

<a href="/cs/project/GA19-04477S" target="_blank" >GA19-04477S: Modelování a měření strukturálně-akustických interakcí s prouděním v biomechanice tvorby hlasu člověka</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2019

Kód důvěrnosti údajů

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

Název statě ve sborníku

Engineering mechanics 2019. Book of full texts

ISBN

978-80-87012-71-0

ISSN

1805-8248

e-ISSN

—

Počet stran výsledku

4

Strana od-do

141-144

Název nakladatele

Institute of Thermomechanics of the Czech Academy of Sciences

Místo vydání

Prague

Místo konání akce

Svratka

Datum konání akce

13. 5. 2019

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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