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Numerical simulation of the effect of stiffness of lamina propria on the self-sustained oscillation of the vocal folds

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F16%3A00459367" target="_blank" >RIV/61388998:_____/16:00459367 - isvavai.cz</a>

  • Alternative codes found

    RIV/00216305:26210/16:PU119427

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Numerical simulation of the effect of stiffness of lamina propria on the self-sustained oscillation of the vocal folds

  • Original language description

    A two-dimensional (2D) finite element (FE) model of the fluid-structure-acoustic interaction during selfsustained oscillation of the human vocal folds (VF) is presented in this paper. The aim is to analyze the effect of stiffness of lamina propria on VF vibrations. Such stiffness change can be caused by some VF pathologies. The developed FE model consists of the FE models of the VF, trachea and a simplified human vocal tract. The vocal tract model shaped for simulation of phonation of Czech vowel [a:] was created by converting data from the magnetic resonance images (MRI). The developed FE model includes VF contact, large deformations of the VF tissue, fluid-structure interaction (FSI), moving boundary of the fluid mesh (Arbitrary Lagrangian-Eulerian (ALE) approach), airflow separation during the glottis closure and solution of unsteady viscous compressible airflow described by the Navier-Stokes equations. The numerical simulations showed that higher values of lamina propria Young's modulus (stiffer lamina propria) result in a decrease of the maximum glottis opening. Stiffer lamina propria also requires the use of higher subglottal pressure to initiate self-sustained vibration of the VF.

  • Czech name

  • Czech description

Classification

  • Type

    D - Article in proceedings

  • CEP classification

    BI - Acoustics and oscillation

  • OECD FORD branch

Result continuities

  • Project

    <a href="/en/project/GA16-01246S" target="_blank" >GA16-01246S: Computational and experimental modelling of self-induced vibrations of vocal folds and influence of their impairments on human voice</a><br>

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2016

  • Confidentiality

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

Data specific for result type

  • Article name in the collection

    ENGINEERING MECHANICS 2016

  • ISBN

    978-80-87012-59-8

  • ISSN

    1805-8248

  • e-ISSN

  • Number of pages

    4

  • Pages from-to

    182-185

  • Publisher name

    Ústav termomechaniky AV ČR, v. v. i.

  • Place of publication

    Praha

  • Event location

    Svratka

  • Event date

    May 9, 2016

  • Type of event by nationality

    EUR - Evropská akce

  • UT code for WoS article

    000379986700042