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Journal of the Korean Academy of Rehabilitation Medicine 2007;31(1):103-108.
Acoustic Analysis of Vowel Sound in Children with Spastic Cerebral Palsy.
Park, Eun Sook , Rha, Dong Wook , Chung, Ho Ik , Park, Ji Eun , Nam, Hee Seung , Kim, Min June
1Department and Research Institute of Rehabilitation Medicine, Yonsei University College of Medicine, Korea. medikss@hanmail.net
2Graduate Program in Speech Pathology, The Graduate School of Yonsei University, Korea.
경직형 뇌성마비 환아의 모음 산출의 음향음성학적 분석
박은숙, 나동욱, 정호익, 박지은1, 남희승, 김민준
연세대학교 의과대학 재활의학교실 및 재활의학연구소, 연세대학교대학원 1언어병리학 협동과정
To investigate the acoustic characteristics of the vowel phonation in children with spastic cerebral palsy (CP) and normal children
Twenty-six children with spastic diplegic CP and seventeen normally developed children were recruited as subjects. Voice samples were collected by pronouncing at full length /a/, /i/, and /u/ three times each into a microphone. With these samples, maximum phonation time using Multi-speech model 3,700, fundamental frequency, jitter percent, shimmer percent, noise to harmony ratio using Multi-Dimensional Voice Program model 5105, and 1st formant, 2nd formant using PraatTM were measured.
Maximum phonation time was significantly shorter in the CP group than normal group (p<0.05). Jitter percent and Shimmer percent were significantly increased in the CP group than in the normal group (p<0.05). Fundamental frequency, 1st formant and 2nd formant were not significantly different between the two groups.
Relatively short duration of maximum phonation time in the CP group suggests poor respiratory control and capacity in children with CP. Higher level of shimmer percent in CP group indicates instability of voice quality that result from poor laryngeal function. No significant difference in 1st formant and 2nd formant between the CP and control group suggests similar vowel articulatory ability. (J Korean Acad Rehab Med 2007; 31: 103-108)
Key Words: Acoustic analysis, Cerebral palsy, Vowel


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