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Nonlinear dynamic analysis of voice in teachers with dysphonia

*, Arivudai Nambi Pitchaimuthu and *, Radish Kumar Balasubramanium and Phadke , Ketaki Vasant and Fernandes, Jacqueline B. and Bhat, Jayashree S. (2015) Nonlinear dynamic analysis of voice in teachers with dysphonia. Asian Journal of Science and Technology, 6 (6). pp. 1479-1481.

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Abstract

Nonlinear dynamic analysis identifies and describe the presence of ‘‘rules’’ underlying the seemingly random nature of a severely perturbed voice. Using this technique, the perturbed voice signal may be viewed as ‘‘chaotic’’ in nature rather than randomly perturbed. Nonlinear dynamic analyses of human voices have established the existence of chaos in human voice production. However, very few studies have characterised the voice in teachers with dysphonia using this method. The aim of the present study was to investigate voice characteristics in teachers with dysphonia using Nonlinear Dynamic Analysis methods. 28 teachers and age matched controls in the age range of 20-40 years served as subjects. The voice samples were recorded and a total of 15 Correlation Dimensions were obtained for the two groups. Results showed significant differences in the correlation dimensions between the two groups indicating a complexity in the laryngeal mechanism of teachers. Thus, it was concluded that Non linear dynamic analysis of voice provided a quantifiable data to assess dysphonia in teachers.

Item Type: Article
Uncontrolled Keywords: Nonlinear Dynamic Analysis of Voice, Correlation Dimension, Chaotic Vibrations, Teachers with Dysphonia
Subjects: Allied Health > Mangalore Campus > Speech and Hearing
Depositing User: KMCMLR User
Date Deposited: 27 Jul 2015 06:52
Last Modified: 27 Jul 2015 06:52
URI: http://eprints.manipal.edu/id/eprint/143590

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