教室言语可懂度主观评价方法实验对比  

Experimental comparison of subjective evaluation methods of speech intelligibility in classrooms

作　　者：刘曦东 祝培生[1] 宋嘉炜 陶畹琪 韩晓迪 LIU Xidong;ZHU Peisheng;SONG Jiawei;TAO Wanqi;HAN Xiaodi(School of Architecture and Fine Art,Dalian University of Technology,Dalian 116024,Liaoning,China)

机构地区：[1]大连理工大学建筑与艺术学院,辽宁大连116024

出　　处：《声学技术》2024年第6期867-875,共9页Technical Acoustics

基　　金：国家自然科学基金(52278092、11774266、51778100、51278078)。

摘　　要：言语可懂度是演讲厅音质评价的重要指标,当前已有多种演讲厅言语可懂度主观评价方法,但这些评价方法的结果差异较大。文章选取了对应于4个不同语音传输指数(speech transmission index, STI),对3类常用的言语可懂度主观评价方法 (共10种主观评价测试)进行了实验对比。结果表明:(1)相同STI值下不同评价方法的结果差异较大,并且听音条件越差,得分差异越明显,最大的差值达到了54.1个百分点。这种差异受多个因素的影响,主要有测试表的信息冗余度、应答方式、测试项数量、词句表种类等。(2)信息冗余度差异对单音节词表、双音节词表和句表的主观评价结果影响较大,3种方法之间的得分差值最大达到了32.0个百分点,这种影响还随听音条件的变化而变化。(3)应答方式对押韵词表的主观评价结果影响较大,并且听音条件越差影响越大;对矩阵句表基本没有影响。(4)测试项数量会明显影响音位平衡单音节词表的难度和信度,测试词表的测试项数量越多,得分越低,同时标准差变小。(5)对于单音节词方法,词表种类对主观评价结果的影响相对较小;对于语句方法,句表种类在听音条件较差时对主观评价结果的影响较大,在听音条件较好时基本没有影响。相关结果可为演讲厅言语可懂度主观评价提供参考。Speech intelligibility is an important index for evaluating speech quality in speech halls.Although there are several subjective evaluation methods of speech intelligibility in speech halls,the results of these evaluation methods vary widely.In this paper,three commonly used subjective evaluation methods of speech intelligibility,including 10 subjective evaluation tests,are compared under 15 sound field conditions with four different STI values in classrooms.The results reveal:(1)The evaluation methods present significantly different results under the same STI values,and the worse the listening condition,the more obvious the difference in scores,with the greatest difference reaching 54.1 percentage points.This difference can be attributed to several factors,including the information redundancy of test lists,response mode,the number of test items,types of word and sentence lists.(2)Information redundancy difference greatly affects the subjective evaluation results of monosyllable word lists,disyllable word lists and sentence lists,with the maximum score difference between the three methods reaching 32.0 percentage points,and this effect also varies with listening conditions.(3)The response mode has a great effect on the subjective evaluation results of rhyme word lists,and the worse the listening condition,the greater the effect,but no effect on the matrix sentence lists.(4)The number of test items significantly affects the difficulty and reliability of phoneme balance monosyllable word lists,increasing the number of test items in the test lists leads to lower scores and smaller standard deviations.(5)For the monosyllable word methods,the word list type has a relatively small effect on the subjective evaluation results;for the sentence methods,the sentence list type has a great effect on the subjective evaluation results in the poor listening conditions,and essentially no effect when the listening conditions are good.These findings provide a reference for the subjective evaluation of speech intelligibility in spee

关 键 词：教室 言语可懂度 单音节词表 双音节词表 句表 语音传输指数(STI) 

分 类 号：TU112.4[建筑科学—建筑理论]