Third International Workshop on Models and Analysis of Vocal Emissions for Biomedical Applications (MAVEBA 2003)

Florence, Italy
December 10-12, 2003

Physical and Numerical Flow-Excited Vocal Fold Models

Scott L. Thomson, L. Mongeau, S. H. Frankel

School of Mechanical Engineering, Purdue University, IN, USA

Self-oscillating physical and numerical models of the vocal folds were investigated. The physical model was cast into an idealized shape of the vocal folds, on a 1:1 length scale with the human vocal folds, using a flexible polyurethane rubber. The model in a hemilaryngeal configuration experienced flow-induced oscillations at a frequency of 90 Hz and onset pressure of 1.2 kPa. The numerical model was a two-dimensional finite element model of the vocal folds and vocal tract. The flow was calculated throughout the flow domain using the incompressible, two-dimensional Navier-Stokes equations. The aerodynamics and vocal fold dynamics were fully coupled. Regular, self-sustained oscillations were predicted at a frequency of approximately 275 Hz. The influence of supraglottal duct length on vocal fold motion is discussed. The capabilities and limitations of the models are discussed, and areas for further development are identified.

Index Terms. Physical model, finite element analysis, vocal fold models

Full Paper (reprinted with permission from Firenze University Press)

Bibliographic reference.  Thomson, Scott L. / Mongeau, L. / Frankel, S. H. (2003): "Physical and numerical flow-excited vocal fold models", In MAVEBA-2003, 147-150.