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Audiology and Speech Research > Volume 13(4); 2017 > Article
Audiology and Speech Research 2017;13(4): 352-360.
Published online: October 31, 2017.
doi: http://doi.org/10.21848/asr.2017.13.4.352
인공와우 이식 아동과 건청 아동의 공명 특성 비교
채문철1,2, 최철희2,3, 최성희2,3
2대구가톨릭대학교 의료보건과학대학원 언어청각치료학과
3대구가톨릭대학교 바이오메디대학 언어청각치료학과, 생체모방감각제어연구소, 가톨릭 청각음성언어센터
Comparison of Resonance Characteristics between Children with Cochlear Implants and Children with Normal Hearing
Mun-Chul Chae1,2, Chul-Hee Choi2,3, Seong Hee Choi2,3
1Aisarang Children Development Center, Daegu, Korea
2Department of Audiology and Speech-Language Pathology, The Graduate School of Health and Medical Science, Daegu Catholic University, Gyeongsan, Korea
3Department of Audiology and Speech-Language Pathology, Research Institute of Biomimetic Sensory Control, Catholic Hearing Voice Speech Center, Daegu Catholic University, Gyeongsan, Korea
Correspondence  Seong Hee Choi ,Tel: +82-53-850-2542, Fax: +82-53-359-0780, Email: shgrace@cu.ac.kr
Received: October 2, 2017; Revised: October 17, 2017   Accepted: October 18, 2017.  Published online: October 31, 2017.
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.).
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).
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.
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.
Key Words: Cochlear implants, Resonance disorders, Nasalance, Auditory-perceptual judgement.
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