Effects of a single reflection with varied horizontal angle and time delay on speech intelligibility.
Effects of a single reflection with varied horizontal angle and time delay on speech intelligibility.
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具有不同水平角和时间延迟的单次反射对语音清晰度的影响。
DOI：
10.1121/1.401426
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
Y. Ando
中科院分区：
文献类型：
--
作者：
T. Nakajima;Y. Ando
以前，几乎所有的物理措施，估计语音清晰度在一个房间里已经来自只有时间单声道标准。本文指出，在单反射声场中，语音可懂度不仅取决于声场的时间-单声道因素，而且还取决于声场的空间-双耳因素。通过改变反射的水平入射角xi，对在直达声之后用延迟时间Δ t1的单次反射模拟的声场进行清晰度测试。结果表明：（1）言语清晰度（SI）随延迟时间t_1的增加而降低;（2）当xi接近90 °时，SI增加;水平反射角对SI有显著影响;（3）清晰度测试成绩的方差分析表明，t_1和xi对SI的影响是完全独立的。关于结果（2），如果收听者在两个耳朵处获得信号的空间分离，则假设收听者的语音感知能力由于向时间模式识别"添加"进一步的信息而得到改善。
Previously, almost all physical measures for estimating speech intelligibility in a room have been derived from only temporal-monaural criteria. This paper shows that speech intelligibility for a sound field with a single reflection depends not only on the temporal-monaural factor but also on the spatial-binaural factor of the sound field. Articulation tests for sound fields simulated with a single reflection of delay time delta t1 after the direct sound were conducted changing the horizontal incident angle xi of the reflection. Remarkable findings are as followings: (1) speech intelligibility (SI) decreases with increasing delay time delta t1, (2) SI increases when xi approaches 90 degrees; the horizontal angle of the reflection causes a significant effect on SI, and (3) the analysis of variance for articulation test scores clearly demonstrated that the effects of both delta t1 and xi on SI are fully independent. Concerning result (2), if listeners get a spatial separation of signals at the two ears, then the listener's capability for speech perception is assumed to be improved due to "adding" further information to the temporal pattern recognition.