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논문 기본 정보

자료유형
학술저널
저자정보
저널정보
한국청각언어재활학회 Audiology and Speech Research Audiology and Speech Research 제10권 제2호
발행연도
2014.1
수록면
138 - 148 (11page)

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초록· 키워드

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The purpose of this study was to identify whether children with sequential bilateral cochlear implants (CIs) couldreceive additional benefit from the 2nd CI for the word-in-noise recognition, and the benefit from 2nd CI would beaffected by age at 2nd implantation during 1-year use of the 2nd implant device. Eighteen children who receivedsequential bilateral CIs participated in this study. Among 18 participants, 9 children received the 2nd implantationbefore 8 years of age (earlier implanted) and the others had the 2nd implantation after 8 years of age (laterimplanted). Since this study aimed to explore whether earlier 2nd implantation improves effectiveness to use bilateralCIs in terms of word-in-noise recognition when compared to later 2nd implantation, the amount of additionalperceptual benefit provided by 2nd CI was calculated as the difference in performance between the 1st CI and thebilateral CIs. The benefit was evaluated in four listening conditions (in quiet, 10, 0, and -10 dB signal-to-noiseratios). Results showed that overall, earlier implanted children had a greater amount of benefit from 2nd implantationcompared to later implanted children, at least for word-in-noise recognition. Only for earlier implanted children, thebenefit from 2nd implant continued to grow up over 12-month use of bilateral implants. The benefit from 2ndimplant was greater for 0 dB SNR condition compared to in quiet or –10 dB SNR conditions. In conclusion,although all participants were good performers (> 60%) with 1st CI alone, the 2nd implant provided additionalperceptual benefit to word recognition in challenging listening conditions such as in the presence of backgroundnoise. Among various factors, age at 2nd implantation was a significant preoperative factor to predict the benefitfrom the use of sequential bilateral implants.

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