Analysis of Vocal Disorders With Methods From Nonlinear Dynamics Several authors have recently demonstrated the intimate relationship between nonlinear dynamics and observations in vocal fold vibration (Herzel, 1993; Mende, Herzel, & Wermke, 1990; Titze, Baken, & Herzel, 1993). The aim of this paper is to analyze vocal disorders from a nonlinear dynamics point of view. Basic concepts and analysis ... Research Article
Research Article  |   October 01, 1994
Analysis of Vocal Disorders With Methods From Nonlinear Dynamics
 
Author Affiliations & Notes
  • Hanspeter Herzel
    Technical University, Berlin, Germany
  • David Berry
    Department of Speech Pathology and Audiology, National Center for Voice and Speech, The University of Iowa, Iowa City
  • Ingo R. Titze
    Department of Speech Pathology and Audiology, National Center for Voice and Speech, The University of Iowa, Iowa City
  • Marwa Saleh
    Ain Shams University, Egypt
  • Contact author: Ingo Titze, PhD, Department of Speech Pathology and National Center for Voice and Speech, the University of Iowa, 330 SHC, Iowa City 52242-1012, E-mail: ingo-titze@uiowa.edu
Article Information
Speech, Voice & Prosodic Disorders / Voice Disorders / Speech, Voice & Prosody / Speech / Research Articles
Research Article   |   October 01, 1994
Analysis of Vocal Disorders With Methods From Nonlinear Dynamics
Journal of Speech, Language, and Hearing Research, October 1994, Vol. 37, 1008-1019. doi:10.1044/jshr.3705.1008
History: Received October 25, 1992 , Accepted March 30, 1994
 
Journal of Speech, Language, and Hearing Research, October 1994, Vol. 37, 1008-1019. doi:10.1044/jshr.3705.1008
History: Received October 25, 1992; Accepted March 30, 1994

Several authors have recently demonstrated the intimate relationship between nonlinear dynamics and observations in vocal fold vibration (Herzel, 1993; Mende, Herzel, & Wermke, 1990; Titze, Baken, & Herzel, 1993). The aim of this paper is to analyze vocal disorders from a nonlinear dynamics point of view. Basic concepts and analysis techniques from nonlinear dynamics are reviewed and related to voice. The voices of several patients with vocal disorders are analyzed using traditional voice analysis techniques and methods from nonlinear dynamics. The two methods are shown to complement each other in many ways. Likely physiological mechanisms of the observed nonlinear phenomena are presented, and it is shown how much of the terminology in the literature describing rough voice can be unified within the framework of nonlinear dynamics.

Acknowledgments
This work was supported by Grant No. P60 00976 from the National Institute on Deafness and Other Communication Disorders. We gratefully acknowledge Julie Lemke for manuscript preparation.
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