摘要
本文比较了４种干扰声源声级（ｄＢＡ）和语言干扰级（ＳＩＬ）的关系，观察了不同ｄＢＡ、ＳＩＬ和信噪比（Ｓ／Ｎ）对语言识别率影响的规律。结果表明ｄＢＡ与ＳＩＬ有很好的线性关系，但不同性质的噪声源，两者间的差值相差很大。４种干扰声源下的语言识别率都有随ｄＢＡ和ＳＩＬ的增加而减少，随ＳｄＢＡ／ＮｄＢＡ和ＳｄＢＡ／ＮＳＩＬ的增加而提高的趋势，但语言识别率与ｄＢＡ、ＳｄＢＡ／ＮｄＢＡ的相关性因噪声的性质不同有很大差异，而与ＳＩＬ、ＳｄＢＡ／ＮＳＩＬ的相关性受噪声性质的影响很小。
Comparisons were made of four kinds of dBA and SIL and a study was undertaken to observe the influence of various dBA, SIL and S/N on speech discrimination score. The results showed that under the four kinds of noise source the speech discrimination score was decreased with increasing of dBA or SIL, and was raised with increasing of SdBA/NdBA or SdBA/NSIL. The correlation between speech discrimination score and dBA or SdBA/NdBA was varied due to different noise sources, but the noise characteristics showed little influence on correlation between speech discrimination score and SIL or SdBA/NSIL.
出处
《声学技术》
CSCD
1999年第3期123-127,共5页
Technical Acoustics
关键词
声级
语言干扰级
信噪比
语言识别率
sound level
speech interference level(SIL)
signal to noise ratio(S/N)
speech discrimination score
