Validation of theoretical models of phonation threshold pressure with data from a vocal fold mechanical replica.
This paper analyzes the capability of a mucosal wave model of the vocal fold to predict values of phonation threshold lung pressure. Equations derived from the model are fitted to pressure data collected from a mechanical replica of the vocal folds. The results show that a recent extension of the model to include an arbitrary delay of the mucosal wave in its travel along the glottal channel provides a better approximation to the data than the original version of the model, which assumed a small delay. They also show that modeling the vocal tract as a simple inertive load, as has been proposed in recent analytical studies of phonation, fails to capture the effect of the vocal tract on the phonation threshold pressure with reasonable accuracy.
Lucero
Jorge C
JC
Department of Mathematics, University of Brasilia, Brasilia, DF, Brazil. lucero@unb.br
Van Hirtum
Annemie
A
Ruty
Nicolas
N
Cisonni
Julien
J
Pelorson
Xavier
X
D001696:Biomechanical Phenomena; D003198:Computer Simulation; D006801:Humans; D008168:Lung / Q000502:physiology; D008953:Models, Anatomic; D008954:Models, Biological; D009716:Numerical Analysis, Computer-Assisted; D009991:Oscillometry; D010699:Phonation; D011312:Pressure; D015203:Reproducibility of Results; D012212:Rheology; D013997:Time Factors; D014732:Vibration; D014827:Vocal Cords / Q000033:anatomy & histology* / Q000502:physiology*