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HÁJEK, P. ŠVANCARA, P. HORÁČEK, J. ŠVEC, J.
Originální název
Influence of Tissue Changes in Superficial Lamina Propria on Production of Czech Vowels
Typ
článek ve sborníku ve WoS nebo Scopus
Jazyk
angličtina
Originální abstrakt
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.
Klíčová slova
Simulation of phonation; Fluid-structure-acoustic interaction; Czech vowels; Finite element method; Biomechanics of voice
Autoři
HÁJEK, P.; ŠVANCARA, P.; HORÁČEK, J.; ŠVEC, J.
Vydáno
13. 5. 2019
Nakladatel
Institute of Thermomechanics of the Czech Academy of Sciences
Místo
Praha
ISBN
978-80-87012-71-0
Kniha
Engineering Mechanics 2019
Edice
First edition
ISSN
1805-8248
Periodikum
Engineering Mechanics ....
Ročník
25
Stát
Česká republika
Strany od
141
Strany do
144
Strany počet
4
BibTex
@inproceedings{BUT157154, author="Petr {Hájek} and Pavel {Švancara} and Jaromír {Horáček} and Jan G. {Švec}", title="Influence of Tissue Changes in Superficial Lamina Propria on Production of Czech Vowels", booktitle="Engineering Mechanics 2019", year="2019", series="First edition", journal="Engineering Mechanics ....", volume="25", pages="141--144", publisher="Institute of Thermomechanics of the Czech Academy of Sciences", address="Praha", isbn="978-80-87012-71-0", issn="1805-8248" }