TY - GEN
T1 - EXPERIMENTAL STUDY OF THE INFLUENCE OF A RECTANGULAR VOCAL FOLDS INCLUSION ON THEIR AUTO-OSCILLATION
AU - Van Hirtum, A.
AU - Ahmad, M.
AU - Chottin, R.
AU - Guasch, O.
AU - Pelorson, X.
N1 - Publisher Copyright:
© 2023 First author et al. This is an open-access article distributed under the terms of the Creative Commons Attribution 3.0 Unported License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
PY - 2023
Y1 - 2023
N2 - 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.
AB - 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.
KW - fluid-structure interaction
KW - mechanical vocal folds replica
KW - phonation
UR - http://www.scopus.com/inward/record.url?scp=85188713778&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85188713778
T3 - Proceedings of Forum Acusticum
BT - Forum Acusticum 2023 - 10th Convention of the European Acoustics Association, EAA 2023
PB - European Acoustics Association, EAA
T2 - 10th Convention of the European Acoustics Association, EAA 2023
Y2 - 11 September 2023 through 15 September 2023
ER -