Experimental validation of a quasi-steady theory for the flow through the glottis

Vilain, Coriandre; Pelorson, Xavier; Fraysse, Christophe; Deverge, Mickaël; Hirschberg, Avraham; Willems, Jan

doi:10.1016/j.jsv.2003.07.035

Cited by 47 publications

(61 citation statements)

References 14 publications

(23 reference statements)

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“…The study here used static geometries and a constant volume flow, and assumed the quasi-steady condition for phonation (Mongeau et al, 1997;Vilain et al, 2004). FLU-ENT (Fluent, Inc., Lebanon, NH), a commercially available computational fluid dynamics package, was used as in an earlier study (Scherer et al, 2001b) to obtain the intraglottal pressure distributions of this study.…”

Section: Methodsmentioning

confidence: 99%

The effect of entrance radii on intraglottal pressure distributions in the divergent glottis

Scherer

Wan

et al. 2012

The Journal of the Acoustical Society of America

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Modeling laryngeal aerodynamics requires specification of the glottal geometry. Changing the glottal exit radius alters the intraglottal pressure distributions in the converging glottis [Scherer et al., J. Acoust. Soc. Am. 110, 2267-2269 (2001]. This study examined the effects of the glottal entrance radius on the intraglottal pressure distributions for divergent angles of 5 , 10 , 20 , 30 , and 40. Glottal airflow and minimal glottal diameter were held constant at 73.2 cm 3 /s and 0.02 cm, respectively. The computational code FLUENT was used to obtain the pressure distributions. Results suggest that a smaller glottal entrance radius tends to (1) lower the transglottal pressure (reduce glottal flow resistance), although this is angle dependent, (2) make the pressure dip near the glottal entrance more negative in value, (3) increase the slope of the pressure distribution just upstream of the glottal entrance, and (4) make the initial pressure recovery (rise) in the glottis steeper. A general empirical equation for transglottal pressure as a function of radius, angle, and separation point location is offered. These results suggest that glottal entrance curvature for the divergent glottis significantly affects the driving pressures on the vocal folds, and needs to be well specified when building computational and physical models.

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Section: Methodsmentioning

confidence: 99%

The effect of entrance radii on intraglottal pressure distributions in the divergent glottis

Scherer

Wan

et al. 2012

The Journal of the Acoustical Society of America

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“…A simplified method to obtain such an estimate is the method of Thwaites. 6,[14][15][16] The momentum thickness h of the viscous boundary layer is estimated by using the expression of Thwaites,…”

Section: A Modified Modelmentioning

confidence: 99%

Comments on “A theoretical model of the pressure field arising from asymmetric intraglottal flows applied to a two-mass model of the vocal folds” [J. Acoust. Soc. Am. 130, 389–403 (2011)]

Hirschberg

2013

The Journal of the Acoustical Society of America

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Document VersionPublisher's PDF, also known as Version of Record (includes final page, issue and volume numbers) Please check the document version of this publication:• A submitted manuscript is the author's version of the article upon submission and before peer-review. There can be important differences between the submitted version and the official published version of record. People interested in the research are advised to contact the author for the final version of the publication, or visit the DOI to the publisher's website.• The final author version and the galley proof are versions of the publication after peer review.• The final published version features the final layout of the paper including the volume, issue and page numbers. Link to publicationCitation for published version (APA): Hirschberg, A. (2013). Comments on "A theoretical model of the pressure field arising from asymmetric intraglottal flows applied to a two-mass model of the vocal folds" [J. Acoust. Soc. Am. 130, 389-403 (2011)].

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“…In order to simplify the fluid dynamics, Bernoulli equation is used to relate the pressure and flow within the glottis. Some literature is also available on non-steady behavior and collision of vocal folds (Pelorson et al, 1994;Deverge et al, 2003;de Vries et al, 2002;Vilain et al, 2004).…”

Section: Introductionmentioning

confidence: 99%

A One-Mass Physical Model of the Vocal Folds with Seesaw-Like Oscillations

Qureshi¹,

Syed²

2011

Archives of Acoustics

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A low-dimensional physical model of small-amplitude oscillations of the vocal folds is proposed here. The model is a simplified version of the body-cover one in which mucosal surface wave propagation has been approximated by the seesaw-like oscillation of the vocal fold about its fulcrum point whose position is adjustable in both the horizontal and vertical directions. This approach works for 180 degree phase difference between the glottal entry and exit displacements. The fulcrum point position has a significant role in determining the shape of the glottal flow. The vertical position of the fulcrum point determines the amplitude of the glottal exit displacement, while its horizontal position governs the shape and amplitude of the glottal flow. An increment in its horizontal position leads to an increase in the amplitude of the glottal flow and the time period of the opening and closing phases, as well as a decrease in the time period of the closed phase. The proposed model is validated by comparing its results with the low-dimensional mucosal surface wave propagation model.

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Experimental validation of a quasi-steady theory for the flow through the glottis

Cited by 47 publications

References 14 publications

The effect of entrance radii on intraglottal pressure distributions in the divergent glottis

The effect of entrance radii on intraglottal pressure distributions in the divergent glottis

Comments on “A theoretical model of the pressure field arising from asymmetric intraglottal flows applied to a two-mass model of the vocal folds” [J. Acoust. Soc. Am. 130, 389–403 (2011)]

A One-Mass Physical Model of the Vocal Folds with Seesaw-Like Oscillations

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