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Velocity distributions in glottal models

Authors
Journal
Journal of Voice
0892-1997
Publisher
Elsevier
Publication Date
Volume
10
Issue
1
Identifiers
DOI: 10.1016/s0892-1997(96)80018-x
Keywords
  • Laryngeal Models
  • Excised Canine Larynx
  • Particle Velocity
  • Hot Wire Anemometry
  • Velocity Profile
Disciplines
  • Computer Science

Abstract

Summary 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.

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