Using Particle Imaging Velocimetry to Measure Anterior-Posterior Velocity Gradients in the Excised Canine Larynx Model
TLDR
The velocity flow fields above the vocal folds in both the midcoronal and midsagittal planes were studied to deduce the mechanisms that cause the anterior-posterior gradient and to determine whether the vortical structures are highly 3-dimensional.Abstract:
Objectives
To quantify the anterior-posterior velocity gradient, we studied the velocity flow fields above the vocal folds in both the midcoronal and midsagittal planes. It was also our purpose to use these fields to deduce the mechanisms that cause the anterior-posterior gradient and to determine whether the vortical structures are highly 3-dimensional.read more
Citations
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Journal ArticleDOI
Fluid Dynamics of Human Phonation and Speech
TL;DR: A review of the fluid dynamics, flow-structure interactions, and acoustics associated with human phonation and speech can be found in this article, where the key biomechanical features of the laryngeal physiology are discussed.
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Three-dimensional nature of the glottal jet.
Michael Triep,Christoph Brücker +1 more
TL;DR: 3D flow structure obtained in a 3:1 up-scaled dynamic glottis model (cam model) in a water circuit is given, extending earlier work and shows complex 3D flow behavior of lengthwise jet contraction and axis switching.
Journal ArticleDOI
Unsteady laryngeal airflow simulations of the intra-glottal vortical structures.
TL;DR: The negative static pressures associated with the intra-glottal vortical structures suggest that the closing phase during phonation may be accelerated by such vortices, which can affect both vocal fold vibration and voice production.
Journal ArticleDOI
A Rat Excised Larynx Model of Vocal Fold Scar.
Nathan V. Welham,Douglas W. Montequin,Ichiro Tateya,Tomoko Tateya,Seong Hee Choi,Diane M. Bless +5 more
TL;DR: The excised larynx model reported here demonstrated robust deterioration across phonatory indices under the scar condition and sensitivity to treatment-induced change under the bFGF condition and holds promise as a tool for the functional characterization of biomechanical tissue changes resulting from vocal fold scar.
Journal ArticleDOI
A review of lumped-element models of voiced speech
Byron D. Erath,Matías Zañartu,Kelley C. Stewart,Michael W. Plesniak,David E. Sommer,Sean D. Peterson +5 more
TL;DR: An overview of advances in lumped-element models and their constituents is provided, with particular emphasis on their physical foundations and limitations.
References
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Flow control with noncircular jets
TL;DR: Noncircular jets have been identified as an efficient technique of passive flow control that allows significant improvements of performance in various practical systems at a relatively low cost because noncircular jet rely solely on changes in the geometry of the nozzle as discussed by the authors.
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Vortex induction and mass entrainment in a small-aspect-ratio elliptic jet
Chih-Ming Ho,Ephraim Gutmark +1 more
TL;DR: In this article, a passive technique of increasing entrainment was found by using a small-aspect-ratio elliptic jet, which was several times greater than that of a circular jet or a plane jet.
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Theoretical and experimental study of quasisteady‐flow separation within the glottis during phonation. Application to a modified two‐mass model
TL;DR: In this article, a revised fluid mechanical description of the air flow through the glottis is proposed, in which the separation point is allowed to move. But this assumption appears quite unrealistic, and considering that the position of the separation points is an important parameter in phonation models, the authors in this paper do not consider this assumption.
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Computational aeroacoustics of phonation, part I: Computational methods and sound generation mechanisms.
TL;DR: The aerodynamic generation of sound during phonation was studied using direct numerical simulations of the airflow and the sound field in a rigid pipe with a modulated orifice to find the dominant sound production mechanism was a dipole induced by the net force exerted by the surfaces of the glottis walls on the fluid along the direction of sound wave propagation.