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Three-dimensional numerical analysis of Czech vowel production

Identifikátory výsledku

  • Kód výsledku v IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F20%3A00538178" target="_blank" >RIV/61388998:_____/20:00538178 - isvavai.cz</a>

  • Nalezeny alternativní kódy

    RIV/61989592:15310/20:73603583 RIV/00216305:26210/20:PU138429

  • Výsledek na webu

    <a href="https://www.engmech.cz/im/doc/EM2020_proceedings.pdf" target="_blank" >https://www.engmech.cz/im/doc/EM2020_proceedings.pdf</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.21495/5896-3-182" target="_blank" >10.21495/5896-3-182</a>

Alternativní jazyky

  • Jazyk výsledku

    angličtina

  • Název v původním jazyce

    Three-dimensional numerical analysis of Czech vowel production

  • Popis výsledku v původním jazyce

    Spatial air pressures generated in human vocal tract by vibrating vocal folds present sound sources of vowel production. This paper simulates phonation phenomena by using fluid-structure-acoustic scheme in a three-dimensional (3D) finite element model of a Czech vowel [o:]. The computational model was composed of four-layered M5-shaped vocal folds together with an idealized trachea and vocal tract. Spatial fluid flow in the trachea and in the vocal tract was obtained by unsteady viscous compressible Navier-Stokes equations. The oscillating vocal folds were modelled by a momentum equation. Large deformations were allowed. Transient analysis was performed based on separate structure and fluid solvers, which were exchanging loads acting on the vocal folds boundaries in each time iteration. The deformation of the fluid mesh during the vocal fold oscillation was realized by the arbitrary Lagrangian-Eulerian approach and by interpolation of fluid results on the deformed fluid mesh. Preliminary results show vibration characteristics of the vocal folds, which correspond to those obtained from human phonation at higher pitch. The vocal folds were self-oscillating at a reasonable frequency of 180 Hz. The vocal tract eigenfrequencies were in the ranges of the formant frequencies of Czech vowel [o:] measured on humans, during self-oscillations the formants shifted to lower frequencies.

  • Název v anglickém jazyce

    Three-dimensional numerical analysis of Czech vowel production

  • Popis výsledku anglicky

    Spatial air pressures generated in human vocal tract by vibrating vocal folds present sound sources of vowel production. This paper simulates phonation phenomena by using fluid-structure-acoustic scheme in a three-dimensional (3D) finite element model of a Czech vowel [o:]. The computational model was composed of four-layered M5-shaped vocal folds together with an idealized trachea and vocal tract. Spatial fluid flow in the trachea and in the vocal tract was obtained by unsteady viscous compressible Navier-Stokes equations. The oscillating vocal folds were modelled by a momentum equation. Large deformations were allowed. Transient analysis was performed based on separate structure and fluid solvers, which were exchanging loads acting on the vocal folds boundaries in each time iteration. The deformation of the fluid mesh during the vocal fold oscillation was realized by the arbitrary Lagrangian-Eulerian approach and by interpolation of fluid results on the deformed fluid mesh. Preliminary results show vibration characteristics of the vocal folds, which correspond to those obtained from human phonation at higher pitch. The vocal folds were self-oscillating at a reasonable frequency of 180 Hz. The vocal tract eigenfrequencies were in the ranges of the formant frequencies of Czech vowel [o:] measured on humans, during self-oscillations the formants shifted to lower frequencies.

Klasifikace

  • Druh

    D - Stať ve sborníku

  • CEP obor

  • OECD FORD obor

    10307 - Acoustics

Návaznosti výsledku

  • 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

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Ostatní

  • Rok uplatnění

    2020

  • Kód důvěrnosti údajů

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

Údaje specifické pro druh výsledku

  • Název statě ve sborníku

    ENGINEERING MECHANICS 2020

  • ISBN

    978-80-214-5896-3

  • ISSN

    1805-8248

  • e-ISSN

  • Počet stran výsledku

    4

  • Strana od-do

    182-185

  • Název nakladatele

    Brno University of Technology Institute of Solid Mechanics, Mechatronics and Biomechanics

  • Místo vydání

    Brno

  • Místo konání akce

    Brno

  • Datum konání akce

    24. 11. 2020

  • Typ akce podle státní příslušnosti

    WRD - Celosvětová akce

  • Kód UT WoS článku