Analytical Methods for Reducing the Number of Independent Parameters Required to Model the Vocal Folds

D. D. Cook1, E. Nauman1, and L. Mongeau2
1Department of Mechanical Engineering, Purdue University, West Lafayette, IN, USA
2Department of Mechanical Engineering, McGill University, Montréal, QC, Canada

Mechanical tissue properties are required for reliable numerical models of the vocal folds. In this study, criteria for determining the compatibility of tissue property values obtained from independent studies are presented.

Two methods for reducing the number of independent material parameters are given. The errors introduced by these assumptions were quantified by performing a modal analysis on a body-cover model of the vocal folds.

These methods provide a means of relating unknown tissue properties to measured data, thus increasing the accuracy of numerical models while reducing the need for, and complexity of parametric studies to account for unknown parameters. In contrast to many computational models which utilize a fixed set of material properties, this study utilized parametric variation of material properties to account for normal human variation.