파킨슨병 환자의 음향 모음 공간 파라미터 비교

Title
파킨슨병 환자의 음향 모음 공간 파라미터 비교
Other Titles
A Comparison of Parameters of Acoustic Vowel Space in Patients with Parkinson's Disease
Author(s)
윤규철강영애[강영애]이학승[이학승]성철재[성철재]
Keywords
idiopathic Parkinson's disease; vowel articulatory space; formant parameters
Issue Date
201012
Publisher
한국음성학회
Citation
말소리와 음성과학, v.2, no.4, pp.185 - 192
Abstract
The acoustic vowel space has been used as an acoustic parameter in dysarthric speech. The aim of this work was to examine mathematical formulae for acoustic vowel space and to apply these to Korean speakers with idiopathic Parkinson's disease(IPD). Five acoustic parameters were chosen from earlier works and one new parameter was proposed, the pentagonal vowel space. The six parameters included triangular vowel space (3 area), irregular quadrilateral vowel space (4 area), irregular pentagonal vowel space (5 area), vowel articulatory index (VAI), formant centralization ratio (FCR) and F2i/F1u ratio (F2ratio). An experimental group of 32 IPD patients(male:female=16:16) and a control group of twenty healthy people (male:female=8:12) participated in the study and repeated vowels (/a-i-u-e-o/) three times. A correlation analysis was performed among the six parameters, 2-way ANOVA was done with gender and groups as independent factors, and an independent sample t-test was conducted between the male and the female group as post hoc comparison. All parameters were highly correlated with each other and only the FCR showed a high negative correlation with the others. The results of ANOVA showed a significant difference in F2 ratio, 3 area, 4 area and 5 area between gender and in 4 area and 5 area between groups. For the male members of the two groups, significant statistical differences were found in all parameters whereas no such differences were found for the female members. These findings indicated that the vowel space of the female group was wider than the vowel space of the male group. These differences may have been caused by gender-specific speech styles rather than by patho-physiological mechanisms. We also claim that the pentagonal vowel space is better than the other vowel spaces at representing the disordered speech in natural speech situations.
URI
http://hdl.handle.net/YU.REPOSITORY/23205
ISSN
2005-8063
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문과대학 > 영어영문학과 > Articles
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