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논문 기본 정보

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학술저널
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한국청각언어재활학회 Audiology and Speech Research Audiology and Speech Research 제9권 제2호
발행연도
2013.1
수록면
137 - 147 (11page)

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초록· 키워드

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The purpose of this study was to investigate effects of noise type and signal-to-noise ratio (SNR) on word recognition performance. Word recognition scores were measured in three types of noise conditions [white noise (WN), speech noise (SN), and multi-talker babble noise (MBN)], which were applied to various signal-to-noise ratio conditions (-5, 0, +5, +10, +15, and +20 dB SNR). Twenty adults and twenty school-aged children with normal hearing sensitivity participated. The results of this study are summarized as follows: First, the adults showed significantly increased word recognition performance as SNR increased from -5 dB to +10 dB in all the noise types. The scores for SN were significantly higher than those for the other noise types and there was no significant difference between MBN and WN. At least +10 dB SNR was required to maximize their recognition abilities in the SN and MBN conditions. Second, the children also showed significantly increased word recognition performance as it changed from +10 dB SNR to +20 dB SNR in three different noise types. Performances were significantly different among three types of noise, indicating SN, MBN, and WN from greatest to least. At least +20 dB SNR was required to maximize their recognition abilities in the SN and MBN conditions. Third. when comparing the performances between adults and children at the +10 dB SNR, there were significant differences between groups and among noise types. In conclusion, the results revealed word recognition to be affected by the function of SNR and type of noise. The findings show that SN and MBN can be more useful in clinical practice than WN, since even subjects with normal hearing showed very low performance in WN. Moreover, when comparing the performances between adults and children, approximately +10 dB SNR was required for children more than adults for their best word recognition performance.
#Multi-talker babble noise #Speech noise #Signal-to-noise ratio #SNR) #White noise #Word recognition

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참고문헌 (28)

참고문헌 신청
Beattie, R. C. / 1989 / Word recognition functions for the CID W-22 test in multitalker noise for normally hearing and hearing-impaired subjects / Journal of Speech and Hear google schola Beattie, R. C. / 1997 / Normal and hearing-impaired word recognition scores for monosyllabic words in quiet and noise / British Journal of Audiology 31 : 153 ~ 164 google schola Cainer, K. E. / 2008 / Learning speech-in-noise discrimination in adult humans / Hearing Research 238 : 155 ~ 164 google schola Carhart, R. / 1970 / Interaction of competing speech signals with hearing loss / Arch Otolaryngology 91 : 273 ~ 279 google schola Cox, R. M. / 1987 / Development of the Connected Speech Test (CST) / Ear and Hearing 8 : 119S ~ 126S google schola

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