인공와우 이식 아동과 건청 아동의 공명 특성 비교
Comparison of Resonance Characteristics between Children with Cochlear Implants and Children with Normal Hearing
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Purpose: The present study examined the nasalance (%) and resonance characteristics in children with normal hearing (NH) and children with cochlear implants (CI) using Nasometer II 6564 (KAY Elemetrics Corp.). Methods: Twenty NH and twenty CI participated in this study. Of twenty children with CI, ten (CI-B) had the CI surgery before three years old and the other ten had after three years old (CI-A). Results: For nasalance of vowels, significantly higher nasalance scores in CI than NH and vowel /i/ was significantly higher than vowel /u/ and /a/. However, no significant differences were found in CI-B and CI-A. Likewise, for oral-sound sentences, significantly higher nasalance scores were observed in CI than NH whereas no difference between CI-B and CI-A. For nasal and nasal-sound sentences, there were no significant differences between NH and CI, and between CI-B and CI-A although lower nasalance scores were found in CI. Generally, CI showed seldom normal resonance (10%) and most of CI demonstrate deviant resonance patterns (90%). Hypernasality was typical resonance pattern, followed by hyponasality, mixed nasality, and cul-de-sac resonance regardless of age of implantation in CI. Conclusion: Although hearing improves following CI, most children with CI demonstrated still abnormal resonance patterns in comparison with NH, which may affect normal speech production. In addition, normal resonance was seldom observed regardless of CI surgery period. Therefore, auditory rehabilitation for resonance was needed after CI for normal speech production.
Abstract
Purpose: The present study examined the nasalance (%) and resonance characteristics in children with normal hearing (NH) and children with cochlear implants (CI) using Nasometer II 6564 (KAY Elemetrics Corp.). Methods: Twenty NH and twenty CI participated in this study. Of twenty children with CI, ten (CI-B) had the CI surgery before three years old and the other ten had after three years old (CI-A). Results: For nasalance of vowels, significantly higher nasalance scores in CI than NH and vowel /i/ was significantly higher than vowel /u/ and /a/. However, no significant differences were found in CI-B and CI-A. Likewise, for oral-sound sentences, significantly higher nasalance scores were observed in CI than NH whereas no difference between CI-B and CI-A. For nasal and nasal-sound sentences, there were no significant differences between NH and CI, and between CI-B and CI-A although lower nasalance scores were found in CI. Generally, CI showed seldom normal resonance (10%) and most of CI demonstrate deviant resonance patterns (90%). Hypernasality was typical resonance pattern, followed by hyponasality, mixed nasality, and cul-de-sac resonance regardless of age of implantation in CI. Conclusion: Although hearing improves following CI, most children with CI demonstrated still abnormal resonance patterns in comparison with NH, which may affect normal speech production. In addition, normal resonance was seldom observed regardless of CI surgery period. Therefore, auditory rehabilitation for resonance was needed after CI for normal speech production.
참고문헌 (16)
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