Bradley J S, Reich R D, Norcross S G
Institute for Research in Construction, National Research Council, Ottawa, Canada.
J Acoust Soc Am. 1999 Oct;106(4 Pt 1):1820-8. doi: 10.1121/1.427932.
Speech intelligibility in rooms is influenced by room acoustics effects and by the signal-to-noise ratio (S/N) of the speech and ambient noise. Several measures such as useful-to-detrimental sound ratios and the speech transmission index predict the combined effects of both types of factors. These measures were evaluated relative to speech intelligibility test results obtained in simulated sound fields. The use of simulated sound fields made it possible to create the full range of combinations of room acoustics and S/N effects likely to be found in rooms for speech. The S/N aspect is shown to be much more important than room acoustics effects and new broadband useful-to-detrimental ratios were validated. Useful-to-detrimental ratios, speech transmission index measures, and values of the articulation loss for consonants were all reasonably accurate predictors of speech intelligibility. Further improvements to these combined measures are suggested.
室内的语音清晰度受室内声学效果以及语音与环境噪声的信噪比（S/N）影响。诸如有用声与有害声之比和语音传输指数等多项指标可预测这两类因素的综合影响。相对于在模拟声场中获得的语音清晰度测试结果，对这些指标进行了评估。模拟声场的使用使得能够创建室内可能出现的室内声学和信噪比效果的全范围组合。结果表明，信噪比方面比室内声学效果重要得多，并且新的宽带有用声与有害声之比得到了验证。有用声与有害声之比、语音传输指数测量值以及辅音清晰度损失值都是语音清晰度的合理准确预测指标。建议对这些综合指标作进一步改进。
