| 성인과 아동의 소음유형 및 신호대잡음비에 따른 단어인지도 |
| 장현숙1, 전슬기2,3 |
1한림대학교 자연과학대학 언어청각학부, 청각언어연구소
2한림대학교 일반대학원 언어청각학과
3서울대학교병원 이비인후과 |
| Effects of Noise Type and Signal-to-Noise Ratio on
Word Recognition Performance of Adults and Children
with Normal Hearing Sensitivity |
| Hyunsook Jang1, Seulki Jeon2,3 |
1Division of Speech Pathology and Audiology, Research Institute of Audiology and Speech Pathology, College of Natural Sciences, Hallym University, Chuncheon, Korea
2Department of Speech Pathology and Audiology, Graduate School, Hallym University, Chuncheon, Korea
3Department of Otorhinolaryngology, Seoul National University Hospital, Seoul, Korea |
| Correspondence |
Hyunsook Jang ,Tel: (033)248-2218, Fax: (033)256-3420, Email: hsjang@hallym.ac.kr
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Received: November 1, 2013; Revised: December 14, 2013 Accepted: December 17, 2013. Published online: December 31, 2013. |
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| ABSTRACT |
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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. |
| Key Words:
Multi-talker babble noise, Speech noise, Signal-to-noise ratio (SNR), White noise, Word recognition |
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