Second International Workshop on Models and Analysis of Vocal Emissions for Biomedical Applications (MAVEBA 2001)

Florence, Italy
September 13-15, 2001

Study of the Airflow Through In-Vitro Oscillating Pathological Vocal Folds

C. Vilain (1), Xavier Pelorson (1), A. Hirschberg (2), J. F. H. Willems (2), L. Le Marrec( 2)

(1) Institut de la Communication Parlée, INPG/Université Stendhal, Grenoble, France (2) Fluid Dynamics Laboratory, TUe, Eindhoven, the Netherlands

We present in this study experimental and theoretical results concerning the behaviour of the airflow through the glottis during phonation. This work follows our previous study on the behaviour of the flow in asymmetric models of vocal folds modelling pathologies. For sake of better control of the parameters, the vocal folds models were rigid but supplied with oscillating airflow. The measurements are now carried out on a more realistic set-up that reproduces the selfsustained oscillations of the vocal folds. It is inspired by previous works on brass player lips oscillations. By modifying asymmetricaly the mechanical properties of the vocal folds models we can simulate pathologies. We then try to reproduce the measured phenomena by use of numerical simulation with a two-mass model inspired by Lous et all..
   In the first section, we describe the experimental set-up we use in this study, then we look at measurements with a special care to ‘pathological' cases. Finally, after a brief description of the numerical model, we present numerical simulations that fit our experimental data.

Full Paper

Bibliographic reference.  Vilain, C. / Pelorson, Xavier / Hirschberg, A. / Willems, J. F. H. / Marre, L. Le (2001): "Study of the airflow through in-vitro oscillating pathological vocal folds", In MAVEBA-2001, 8-13.