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    Theoretical simulation and experimental validation of inverse quasi-one-dimensional steady and unsteady glottal flow models

    Access Status
    Fulltext not available
    Authors
    Cisonni, Julien
    Van Hirtum, A.
    Pelorson, X.
    Willems, J.
    Date
    2008
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Cisonni, J. and Van Hirtum, A. and Pelorson, X. and Willems, J. 2008. Theoretical simulation and experimental validation of inverse quasi-one-dimensional steady and unsteady glottal flow models. Journal of the Acoustical Society of America. 124 (1): pp. 535-545.
    Source Title
    Journal of the Acoustical Society of America
    DOI
    10.1121/1.2931959
    ISSN
    0001-4966
    School
    Department of Mechanical Engineering
    URI
    http://hdl.handle.net/20.500.11937/35100
    Collection
    • Curtin Research Publications
    Abstract

    In physical modeling of phonation, the pressure drop along the glottal constriction is classically assessed with the glottal geometry and the subglottal pressure as known input parameters. Application of physical modeling to study phonation abnormalities and pathologies requires input parameters related to in vivo measurable quantities commonly corresponding to the physical model output parameters. Therefore, the current research presents the inversion of some popular simplified flow models in order to estimate the subglottal pressure, the glottal constriction area, or the separation coefficient inherent to the simplified flow modeling for steady and unsteady flow conditions. The inverse models are firstly validated against direct simulations and secondly against in vitro measurements performed for different configurations of rigid vocal fold replicas mounted in a suitable experimental setup. The influence of the pressure corrections related to viscosity and flow unsteadiness on the flow modeling is quantified. The inversion of one-dimensional glottal flow models including the major viscous effects can predict the main flow quantities with respect to the in vitro measurements. However, the inverse model accuracy is strongly dependent on the pertinence of the direct flow modeling. The choice of the separation coefficient is preponderant to obtain pressure predictions relevant to the experimental data. © 2008 Acoustical Society of America.

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