A just noticeable difference in C50 for speech
A just noticeable difference in C50 for speech
复制标题
DOI：
10.1016/s0003-682x(98)00075-9
复制
发表时间：
1999-10-01
影响因子：
3.4
通讯作者：
Norcross, SG
中科院分区：
文献类型：
--
作者：
Bradley, JS;Reich, R;Norcross, SG
C-50是一个早到晚到的声音比率，用于评估室内声学对语音清晰度和可懂度的影响。对于模拟声场中的语音，确定C-50值的刚好可察觉的差异。在C-50值从-3到+9dB的范围内，代表了房间中的大多数语音情况，估计最明显的差异为1.1 dB。语音传输指数（STI）值的相应的刚刚可察觉的差异为0.03。这类似于先前对语音和音乐信号的相关估计。为了改善房间的声学特性，可能需要将C-50增加约3 dB，以在日常情况下产生易于检测的改善。(C)1999年加拿大国家研究理事会，由Elsevier Science Ltd.出版。保留所有权利。
C-50 is an early-to-late arriving sound ratio used to assess the influence of room acoustics on the clarity and intelligibility of speech. A just noticeable difference in C-50 values was determined for speech sounds in simulated sound fields. Over a range of C-50 values from -3 to +9dB, representing most situations in rooms for speech, a just noticeable difference was estimated to be 1.1 dB. The corresponding just noticeable difference in Speech Transmission Index (STI) values was 0.03. This is similar to previous related estimates for speech and musical signals. To improve the acoustical characteristics of a room for speech, it is probably necessary to increase C-50 by approximately 3 dB to create a readily detectable improvement in everyday situations. (C) 1999 National Research Council Canada, Published by Elsevier Science Ltd. All rights reserved.