EXPERIMENTAL STUDY OF THE INFLUENCE OF A RECTANGULAR VOCAL FOLDS INCLUSION ON THEIR AUTO-OSCILLATION

A. Van Hirtum, M. Ahmad, R. Chottin, O. Guasch, X. Pelorson

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Resumen

Vocal folds auto-oscillation is the result of a fluid-structure-acoustic interaction within the larynx. Vocal folds structure changes are often associated with voice pathologies affecting voice professionals as well as the general public. Therefore, in this work, the influence of the vocal folds structure on the auto-oscillation is investigated. An experimental study of the influence of local vocal folds rigidification on the resulting auto-oscillation is presented. Silicone molded four-layer mechanical vocal folds replicas are used. The layers composition and elasticity properties reflect the multi-layer anatomical representation of a human vocal fold. A local rigidification within these vocal fold replicas is obtained by adding a stiff rectangular inclusion during the molding process. The position and orientation of the inclusion are varied in a way that the elasticity of the replica is affected. For each replica, the auto-oscillation characteristics are experimentally studied from measured physical quantities as upstream pressure and vocal folds displacement. The inclusion is shown to result in complex dynamic behaviour of the oscillation frequency and to affect the upstream threshold pressures associated with oscillation onset and offset.

Idioma originalInglés
Título de la publicación alojadaForum Acusticum 2023 - 10th Convention of the European Acoustics Association, EAA 2023
EditorialEuropean Acoustics Association, EAA
ISBN (versión digital)9788888942674
EstadoPublicada - 2023
Evento10th Convention of the European Acoustics Association, EAA 2023 - Torino, Italia
Duración: 11 sept 202315 sept 2023

Serie de la publicación

NombreProceedings of Forum Acusticum
ISSN (versión impresa)2221-3767

Conferencia

Conferencia10th Convention of the European Acoustics Association, EAA 2023
País/TerritorioItalia
CiudadTorino
Período11/09/2315/09/23

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