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KMID : 1022420100020010113
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Phonetics and Speech Sciences
2010 Volume.2 No. 1 p.113 ~ p.120
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Perturbation and Nonlinear Dynamic Analysis of Sustained Vowels in Normal and Pathological Voices
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Lee Ji-Yeoun
Choi Seong-Hee
Jiang Jack J.
Hahn Min-Soo
Choi Hong-Shik
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Abstract
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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.
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KEYWORD
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Nonlinear dynamic analysis, perturbation analysis, laryngeal pathologies, normal voices
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