Phonetics and Speech Sciences (말소리와 음성과학)

Korean Society of Speech Sciences (한국음성학회)
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Perturbation and Nonlinear Dynamic Analysis of Sustained Vowels in Normal and Pathological Voices

  • Lee, Ji-Yeoun (Department of Surgery, Division of Otolaryngology-Head and Neck Surgery, University of Wisconsin Medical School, 5745a Medical Sciences Center, 1300 University Avenue) ;
  • Choi, Seong-Hee (Department of Surgery, Division of Otolaryngology-Head and Neck Surgery, University of Wisconsin Medical School, 5745a Medical Sciences Center) ;
  • Jiang, Jack J. (Department of Surgery, Division of Otolaryngology-Head and Neck Surgery, University of Wisconsin Medical School, 5745a Medical Sciences Center) ;
  • Hahn, Min-Soo (KOREA Advanced Institute of Science and Technology) ;
  • Choi, Hong-Shik (Kangnam Severance Hospital, Yonsei University College of Medicine. Institute of Logopedics and Phoniatrics)
  • Received : 2010.01.29
  • Accepted : 2010.03.19
  • Published : 20100300
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Abstract

In this paper, we investigate the acoustic characteristics of sustained voices from normal subjects and patients with laryngeal pathologies. Perturbation methods (including jitter and shimmer), signal-to-noise ratio (SNR), and nonlinear dynamic methods (such as correlation dimension) are used to analyze normal and pathological voices. We find that jitter does not statistically discriminate between normal and pathological voices, but a significant difference is found for shimmer, SNR, and correlation dimension. The results suggest that nonlinear dynamic analysis may be valuable for the analysis of normal and pathological voices but perturbation analysis should be applied with caution for pathological voice analysis.

Keywords