Relationship between speech transmission index and easiness of speech perception in reverberatory fields
Relationship between speech transmission index and easiness of speech perception in reverberatory fields
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混响场语音传输指数与语音感知容易程度的关系
DOI：
10.1121/1.421726
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发表时间：
1998
影响因子：
2.4
通讯作者：
M. Nagatomo
中科院分区：
文献类型：
--
作者：
Hiroshi Sato;H. Yoshino;M. Nagatomo
在评估室内言语清晰度时，日本采用三音节发音测试作为标准指标之一。有时听觉印象和清晰度测试的分数之间存在差异。因此，通过实验测量了言语感知容易度（ESP）的心理量表值，结果表明ESP与发音分数之间存在差异，并且ESP与混响中言语传输指数（STI）之间存在良好的相关性（R=0.9）。本文的目的是指出声场条件与ESP之间的关系。本研究中的两个实验中的第一个是在反射场中进行的。直达声的声压级（SPL）、直达声与第一反射比（D/R）、初始延迟时间、混响频率特性和混响时间（RT）是不同的。另一个实验是在实际礼堂的模拟场地中进行的。第一个实验的结果表明D/R和RT对ESP有很大的影响，并且当改变D/R时，ESP和STI之间的相关性不好(R=0.6)。第二个实验表明，当声源位于舞台中央时，STI与ESP的相关性为0.8；而在使用扩声系统时发现了不同的趋势。
When evaluating speech intelligibility in rooms, the Tri‐syllable articulation test is used as one of the standard indicators in Japan. Sometimes there are differences between auditory impression and the score of the articulation test. So the psychological scale values of easiness of speech perception (ESP) were measured by experiments, which indicated differences between ESP and articulation scores and a good correlation (R=0.9) between ESP and speech transmission index (STI) in reverberation. The purpose of this paper is to point out relationships between the condition of sound field and ESP. The first of two experiments in this study was done in reverberatory fields. Sound‐pressure level (SPL) of direct sound, direct sound to first reflection ratio (D/R), initial delay time, frequency characteristics of reverberation, and reverberation time (RT) were varied. The other experiment was done in simulated fields of actual auditoriums. The result of the first experiment shows D/R and RT has alarge effect on ESP and while varying D/R, the correlation between ESP and STI is not good (R=0.6). The second experiment indicates that when the sound source is on the center of the stage, the correlation between STI and ESP is 0.8; and a different tendency is found while using the sound reinforcement system.