Computation of physiological human vocal fold parameters by mathematical optimization of a biomechanical model.

Yang A, Stingl M, Berry DA, Lohscheller J, Voigt D, Eysholdt U, Döllinger M (2011)

Publication Type: Journal article, Original article

Publication year: 2011

Journal

Publisher: Acoustical Society of America

Book Volume: 130

Pages Range: 948-964

Journal Issue: 2

DOI: 10.1121/1.3605551

Abstract

With the use of an endoscopic, high-speed camera, vocal fold dynamics may be observed clinically during phonation. However, observation and subjective judgment alone may be insufficient for clinical diagnosis and documentation of improved vocal function, especially when the laryngeal disease lacks any clear morphological presentation. In this study, biomechanical parameters of the vocal folds are computed by adjusting the corresponding parameters of a three-dimensional model until the dynamics of both systems are similar. First, a mathematical optimization method is presented. Next, model parameters (such as pressure, tension and masses) are adjusted to reproduce vocal fold dynamics, and the deduced parameters are physiologically interpreted. Various combinations of global and local optimization techniques are attempted. Evaluation of the optimization procedure is performed using 50 synthetically generated data sets. The results show sufficient reliability, including 0.07 normalized error, 96% correlation, and 91% accuracy. The technique is also demonstrated on data from human hemilarynx experiments, in which a low normalized error (0.16) and high correlation (84%) values were achieved. In the future, this technique may be applied to clinical high-speed images, yielding objective measures with which to document improved vocal function of patients with voice disorders.

Authors with CRIS profile

Involved external institutions

University of California Los Angeles (UCLA) United States (USA) (US) Max Planck Institute for Evolutionary Anthropology / Max-Planck-Institut für evolutionäre Anthropologie Germany (DE)

How to cite

APA:

Yang, A., Stingl, M., Berry, D.A., Lohscheller, J., Voigt, D., Eysholdt, U., & Döllinger, M. (2011). Computation of physiological human vocal fold parameters by mathematical optimization of a biomechanical model. Journal of the Acoustical Society of America, 130(2), 948-964. https://dx.doi.org/10.1121/1.3605551

MLA:

Yang, Anxiong, et al. "Computation of physiological human vocal fold parameters by mathematical optimization of a biomechanical model." Journal of the Acoustical Society of America 130.2 (2011): 948-964.

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