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Updated: Apr 26, 2026

Hemi-laryngeal Setup for Studying Vocal Fold Vibration in Three Dimensions
Published on: November 25, 2017
Influence of glottal cross-section shape on phonation onset
Annemie Van Hirtum1, Bo Wu1, Xavier Pelorson1
1GIPSA-Lab, UMR CNRS 5216, Grenoble University, F-38031 Grenoble Cedex 1, France.
Abstract:
Phonation models commonly rely on the assumption of a two-dimensional glottal geometry to assess kinetic and viscous flow losses. In this paper, the glottal cross-section shape is taken into account in the flow model in order to capture its influence on vocal folds oscillation. For the assessed cross-section shapes (rectangular, elliptical, or circular segment) the minimum pressure threshold enabling to sustain vocal folds oscillation is altered for constriction degrees smaller than 75%. The discrepancy between cross-section shapes increases as the constriction degree decreases.
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