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Audiol > Volume 3(2); 2007 > Article
Audiology 2007;3(2): 151-153.
Published online: December 31, 2007.
doi: http://doi.org/10.21848/audiol.2007.3.2.151
신호대잡음비가 인공와우착용자의 GDT에 미치는 영향
한수희1, 구성민2, 하은정1, 신정은1, 박홍주1, 임덕환3
1건국대학교 의과대학 이비인후과학교실
2한림대학교 대학원 청각학과
3한림대학교 언어청각학부 청각학과, 청각언어연구소
Effects SNR Levels on Gap Detection Thresholds of Cochlear Implantees
Soohee Han1, Sungmin Koo2, Eunjung Ha1, Jungeun Shin1, Hongju Park1, Dukhwan Lim3
1Department of Otolaryngology, College of Medicine, Kunguk University, Seoul, Korea
2Section of Audiology, Graduate School, Hallym University, Chuncheon, Korea
3Section of Audiology, Audiology & Speech Pathology Research Institute, Hallym University, Chuncheon, Korea
Correspondence  Soohee Han ,Tel: (02) 2030-5290, Fax: (02) 2030-5009, Email: suddori@hanmail.net
Received: July 15, 2007;  Accepted: October 3, 2007.  Published online: December 31, 2007.
Cochlear implantees often showed some degrees of difficulty in speech discrimination. In this task, fine temporal resolution or structure of the speech might be an important parameter for the correct discrimination. This temporal resolution could be measured using gap detection threshold. In this study, within-channel gap detection thresholds of cochlear implantees were analyzed under ipsilateral background noise conditions with various signal-to-noise ratios. Four adult cochlear implantees were examined for gap detection thresholds under quiet, +10, +5, 0, -5, -10 dB SNR conditions. These data were compared with those of normal adults (n=10) and elders (n=10) to assess the temporal ability of cochlear implantees under background noise conditions. In these results, cochlear implant group showed longest gap detection thresholds under quiet condition (mean 13.4 msec) while normal and elder groups exhibited 3.3 msec and 6.2 msec of mean values. Gap detection thresholds of cochlear implantees were deteriorated even more under ipsilateral noise conditions and demonstrated worse performances than the other two groups. In conclusion, cochlear impantees showed more difficulties in temporal performances than normal adults or elders did. Improvement in performances on temporal domain has been one of the critical issues for better speech perception in cochlear implantees. These data from gap detection performances under various noise conditions may be used as effective indications of assessing the rehabilitation in cochlear implantation.
Key Words: GDT·Cochlear implant·SNR.
중심단어: GDT· 인공와우· 신호대잡음비.
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