Abstract
Hoarseness, the primary symptom of voice disorders, results from irregular vocal fold vibrations. The oncological therapy of laryngeal cancer may even result in a total loss of voice if an excision of the larynx, and thus, the vocal folds, is necessary. State-of-the-art voice rehabilitation technique in this case is the utilization of scarred tissue in the upper part of the esophagus for substitute voice production. The quality of laryngeal voice, as well as the substitute voice, primarily depends on the anatomy and the vibration patterns of the voice-producing element. Using endoscopic high-speed recordings, the voice generators are observed during voice production. In this work, a model-based approach feasible for the analysis and objective quantification of vocal fold vibrations, as well as the PE dynamics, is presented. By means of an automatic parameter optimization, the dynamic of a biomechanical model of the considered voice-producing element is fitted to the recorded vibration patterns. Thereby spatial and temporal properties of the vibrations are incorporated. The resulting values of the optimization parameters represent an objective quantification of the vibration patterns. In addition, the model parameters enable an approximation of physiological tissue parameters as stiffness and mass distribution.
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