Phonation threshold pressure at large asymmetries of the vocal folds

Jorge Lucero (1) , Xavier Pelorson (2, 3) , Annemie van Hirtum (2, 3)

1 UnB - University of Brasilia [Brazil]
2 LEGI - Laboratoire des Écoulements Géophysiques et Industriels [Grenoble]
3 CNRS - Centre National de la Recherche Scientifique

The phonation threshold value of the lung pressure has been interpreted as a measure of ease of phonation and proposed as a diagnostic parameter for vocal health. Therefore, it is important to understand its behavior as a function of laryngeal parameters, particularly in abnormal configurations. This paper compares results from a theoretical model of the vocal folds with measures from a mechanical replica, in the presence of a natural frequency asymmetry. It shows that, at small asymmetry, the threshold pressure increases with the degree of asymmetry, whereas at large asymmetry, the threshold pressure reaches a plateau.

Domaines: Mécanique des fluides [physics.class-ph]; Acoustique [physics.class-ph]

Jorge Lucero, Xavier Pelorson, Annemie van Hirtum. Phonation threshold pressure at large asymmetries of the vocal folds. Biomedical Signal Processing and Control, 2020, ⟨10.1016/j.bspc.2020.102105⟩. ⟨hal-02920405⟩