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Journal of the Korean Academy of Rehabilitation Medicine 1999;23(1):186-191.
Visualization and Quantitative Analysis of Bulbar Palsy and Its Progression Using Sound Spectrography: A case report.
Kim, Yoo Chang , Seo, Jeong Hwan , Kim, Hyun Gi , Kim, Yun Hee
1Department of Rehabilitation Medicine, Chonbuk National University College of Medicine.
2Institute of Medical Science, Chonbuk National University College of Medicine.
3Department of French Language and Literature, Chonbuk National University College of Human Science.
음향분광기를 이용한 구 마비 상태와 경과에 대한 시각적 정량적 분석 ⁣증례 보고⁣
김유창, 서정환, 김현기1, 김연희
전북대학교 의과대학 재활의학교실, 의과학 연구소 및 1인문과학대학 불어불문학과

Distortion of vowels in dysarthria associated with amyotrophic lateral sclerosis can be detected at the perceptual, physiological, and acoustical levels of analysis. Sound spectrography was used to analyse the formants of vowels which reflect position and space of articulatory organs. We analyse status and progression of dysarthria in 54 year old women with amyotrophic lateral sclerosis using sound spectrography. Target formant frequencies were measured from select words containing the vowels /a/, /e/, /i/, /o/, /u/.
revealed that dysarthric patient exhibited smaller vowel space areas and less systematic changes in vowel spaces for pronouncing different vowels in comparison with normal control. Changes of vowel formants in sound spectrographic analysis reflected progression of dysarthric symptom in this patient. We conclude that acoustic analysis of vowels using sound spectrography is a useful tool to visualize and quantitatively analyse the severity and progression of dysarthria due to paralytic articulatory organ.

Key Words: Amyotrophic lateral sclerosis (ALS), Dysarthria, Quantitative analysis, Sound spectrography
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