Velocity distributions in glottal models |
| |
Authors: | F Alipour R Scherer J Knowles |
| |
Institution: | 1Department of Speech Pathology and Audiology, Wendell Johnson Speech and Hearing Center, The University of Iowa, Iowa City, Iowa, U.S.A.;*Wilbur James Gould Voice Research Center, The Denver Center for the Performing Arts, Denver, Colorado, U.S.A. |
| |
Abstract: | Velocity distributions within three models of the human larynx, namely, a rigid plexiglas model, an excised canine larynx, and a computational model are investigated with experimental and theoretical analyses. A plexiglas wind tunnel with interchangeable glottal constrictions was used as a two-dimensional steady-flow model to measure velocity and pressure for various glottal shapes. A canine excised larynx was used as a prototype pulsatile flow model to study pressure and velocity variations during phonation. Results of the plexiglas modelling indicated a parabolic laminar velocity profile upstream of the glottal constriction and turbulent and asymmetric velocity profiles downstream of the glottal constriction. The time-averaged velocities of the excised larynx had similarities with the plexiglas model results, and instabilities and asymmetries were also demonstrated by the computational method. |
| |
Keywords: | Laryngeal models Excised canine larynx Particle velocity Hot wire anemometry Velocity profile |
本文献已被 ScienceDirect 等数据库收录! |
|