Using listening difficulty ratings of conditions for speech communication in rooms.
Using listening difficulty ratings of conditions for speech communication in rooms.
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使用房间内语音交流条件的听力难度评级。
DOI：
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发表时间：
2005
影响因子：
2.4
通讯作者：
M. Morimoto
中科院分区：
文献类型：
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作者：
Hiroshi Sato;J. S. Bradley;M. Morimoto
在房间里的语音通信的听力难度评级的使用进行了探讨，因为在常见的情况下，单词识别分数不区分以及接近可接受的条件。特别是，语音的早期反射的听力困难的好处进行了调查，并与已知的好处字的可懂度分数。听力测试被用来评估单词的可懂度和感知听力困难的语音在模拟声场。实验在三种类型的声场中进行，具有恒定的环境噪声水平：仅直接声音，直接声音与早期反射，直接声音与早期反射和混响。结果表明：（1）听力困难度比单词识别分数能更好地区分这些条件;（2）在没有混响的条件下，增加的早期反射增加了相当于增加的能量的有效信噪比;（3）早期反射对难度分数的好处大于简单增加早期到达语音能量的预期;（4）单词可懂度测试最适合于信噪比小于0 dBA的情况，当信噪比在0 ~ 15 dBA之间时，听力难度是一个更合适的评估工具。
The use of listening difficulty ratings of speech communication in rooms is explored because, in common situations, word recognition scores do not discriminate well among conditions that are near to acceptable. In particular, the benefits of early reflections of speech sounds on listening difficulty were investigated and compared to the known benefits to word intelligibility scores. Listening tests were used to assess word intelligibility and perceived listening difficulty of speech in simulated sound fields. The experiments were conducted in three types of sound fields with constant levels of ambient noise: only direct sound, direct sound with early reflections, and direct sound with early reflections and reverberation. The results demonstrate that (1) listening difficulty can better discriminate among these conditions than can word recognition scores; (2) added early reflections increase the effective signal-to-noise ratio equivalent to the added energy in the conditions without reverberation; (3) the benefit of early reflections on difficulty scores is greater than expected from the simple increase in early arriving speech energy with reverberation; (4) word intelligibility tests are most appropriate for conditions with signal-to-noise (S/N) ratios less than 0 dBA, and where S/N is between 0 and 15-dBA S/N, listening difficulty is a more appropriate evaluation tool.