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ORIGINAL ARTICLE
Commun Sci Disord. 2004;9(2): 116-128.
A Study of Acoustic Characteristics of Vowels in Preschool Cerebral Palsy Children with Spastic Diplegia
Ji Eun Park` , Eun Sook Park` , and Hyang Hee Kim`
Copyright ©2004 The Korean Academy of Speech-Language Pathology and Audiology
박지은(Ji Eun Park)| 박은숙(Eun Sook Park)| 김향희(Hyang Hee Kim)
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ABSTRACT
This study reports an investigation on the acoustic characteristics in the vowel phonation of preschool children with spastic diplegia due to cerebral palsy(CP). A group of 15 children with spastic diplegia were compared to 9 normal controls in sustained /a/ phonation. There were significant differences between the two groups in the maximum phonation time, jitter percent, shimmer percent, and noise to harmonic ratio. The respiratory capacity of the CP children was reduced and phonation capacity was also impaired due to the defect in vocal cord control. Maximum phonation time of the CP children did not increase as age increased whereas that of the normal controls did. When average fundamental frequency, first formant, and second formant of vowel were compared between the two groups, no reliable difference was found. The results indicate that unlike other types of CP, spastic diplegia children with better upper body control have a similar ability to normal developing children in vowel articulatory ability compared to respiration and phonation.
Keywords: 학령전기 경직형 하지마비 | 최대연장발성지속시간 | 기본주파수 | 주파수변동률 | 진폭변동률 | 소음 대 배음 비율 | 모음 포먼트
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