评价室内汉语清晰度中STI计权方法适用性检验

为检验评价室内汉语（普通话）清晰度中不同语言传输指数（STI）计权方法的适用性,通过在一系列不同听音条件下的主观听音试验与声场测量,研究了4种典型计权方法下的STI与汉语清晰度得分（SI）之间的相关性.回归分析表明这4种计权方法对应的STI与SI间呈现了良好的正相关关系.相比于在计权因子变化时STI与SI间三次多项式回归标准偏差可能达到的最小值与最大值,这4种STI对应的回归标准偏差接近最大值而远离最小值,显示了它们在评价室内汉语清晰度时的良好性质.与其他涉及不同客观参量与语种的同类研究结果的对比也表明,这4种STI评价室内汉语清晰度的精度处于一个较好的范围内.

Applicability of weighting methods in calculating speech transmission index for assessing speech intelligibility of chinese in rooms

The research aims at verifying and comparing the applicability of four typical weighting methods of the speech transmission index(STI) for assessing speech intelligibility(SI) of chinese mandarin in rooms.Through subjective tests and sound field measurements under a series of different listening conditions,correlations between the SI of chinese and STIs calculated with the four weighting methods were studied.The regression analysis shows that there exists good positive correlation between the SI and the four STIs.The standard deviations of three order polynomial fits between the SI and the four STIs are near to the possibly minimum values of the standard deviation reached when the weighting factors vary,and away from the maximum values of the standard deviation,which showing the four STIs have good property for assessing SI of chinese in rooms.And the comparison with some other research results involving different objective metrics and languages also shows that the precision of the four STIs for assessing chinese speech intelligibility in rooms is within good range.