Effects of reverberation time on binaural Korean monosyllabic word recognition in normal hearing subjects

Dukhwan Lim

doi:10.7776/ASK.2021.40.6.678

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2021 Vol.40, Issue 6 Preview Page

Research Article

Effects of reverberation time on binaural Korean monosyllabic word recognition in normal hearing subjects 잔향시간이 양이를 사용한 한국어 단음절 인지에 미치는 영향

30 November 2021. pp. 678-682

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Abstract

Reverberation Time (RT) with noise levels can affect speech recognition ability in a listening environment. The degree of influence may depend on reverberation times and modes of binaural hearing. In this study, Korean monosyllabic Word Recognition Scores (WRS) were investigated in 10 young normal hearing subjects under binaural conditions. The RT of 3.4 s and signal to noise ratio of 0 dB were used at 55 dB HL for diotic (noise with the same phase) and dichotic (noise with the fixed phase difference, π) conditions. The improvement in WRS was noted in dichotic hearing (p < 0.05) while the similar trend was not observed in diotic hearing. This data may be useful in analyzing psychoacoustic effects of RTs under noisy conditions.

Keywords

Reverberation time

Monosyllabic word recognition

Binaural hearing

Signal to noise ratio

실내에서 소음과 함께 존재하는 잔향시간은 어음인지에 영향을 미친다. 그 정도는 청취 조건이나 사용된 언어의 특성에 따라서 그 내용이 다를 수 있다. 본 연구에서는 양이 청취 조건에서 잔향시간이 정상 성인 10인의 표준화된 한국어 단음절 변별력에 미치는 효과를 확인하고자 하였다. 양이 청취효과는 diotic(양이 소음간 동일 위상) 조건과 dichotic(양이 소음 간 위상차 존재, π) 조건에서 신호대잡음비를 0 dB로 고정하였다(55 dB HL). 잔향시간 효과를 관찰할 수 있는 3.4 s에서 대상의 단음절 변별력인 Word Recognition Score(WRS)점수를 분석하였다. 결과에서 dichotic인 경우에는 단측 청취 결과와 비교하여 유의한 변별력 개선이 보였고(p < 0.05), diotic 조건에서는 단측청취와 유의한 차이를 관찰할 수 없었다. 이러한 결과는 잔향시간을 고려한 여러 소음 음향 환경 분석에 참고가 될 수 있을 것으로 판단된다.

키워드

잔향시간

단음절인지

양이청취

신호대잡음비

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Information

Publisher :The Acoustical Society of Korea
Publisher(Ko) :한국음향학회
Journal Title :The Journal of the Acoustical Society of Korea
Journal Title(Ko) :한국음향학회지
Volume : 40
No :6
Pages :678-682
Received Date : 2021-09-28
Revised Date : 2021-11-15
Accepted Date : 2021-11-24
DOI :https://doi.org/10.7776/ASK.2021.40.6.678

The Journal of the Acoustical Society of Korea ISSN:1225-4428(Print) 2287-3775(Online) 한국음향학회지

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