教室健康声环境客观评价参量关系研究  

Study on the Relationship between Objective EvaluationMetrics of Classroom Healthy Acoustic Environment

作　　者：任锡洁 祝培生[1] 陶畹琪 韩晓迪 刘曦东 刘浩成 

机构地区：[1]大连理工大学建筑与艺术学院

出　　处：《建筑细部》2021年第6期842-847,共6页Architecture & Detail

基　　金：国家自然科学基金项目(No.51778100,No.51278078)。

摘　　要：言语可懂度是评价教室声环境的重要参量。在相关的教室声学设计、健康建筑评价规范中,主要是针对混响时间(RT)和背景噪声(BNL)给出建议值,但二者与言语可懂度并没有直接的对应关系。语音传输指数(STI)是IEC 60268-16标准规定的言语可懂度客观评价方法,能综合考虑混响和噪声的综合影响,并与主观言语可懂感受直接对应,应用于教室声环境评价具有显著优势。本研究依据19间教室的声学实测数据,结合ODEON音质仿真,获取了1560种不同的教室声学条件,并建立了STI与RT和BNL之间的对应关系,进而明确了言语可懂度与RT和BNL的对应关系。研究结果可推进STI在教室声环境综合评价中的应用,并为教室声学设计、教室声舒适评价提供明确的参考。Speech intelligibility is an important metric that can be used to evaluate the classroomacoustic environment.The relevant acoustic design standards for classrooms and the assess-ment standards for healthy buildings mainly give recommended values for Reverberation Time(RT)and Background Noise Level(BNL),but there is no direct correspondence among RT,BNLand speech intelligibility.The Speech Transmission Index(ST)is an objective evaluation methodof speech intelligibility as defined by lEC 60268-16,which takes into account the combined ef-fects of reverberation and noise.Moreover,STl corresponds directly to the subjective perceptionof speech intelligibility and has significant advantages when applied to evaluate the classroomacoustic environment.In this study,1560 different classroom acoustic conditions were obtainedbased on actual acoustic measurements in 19 classrooms,combined with ODEON acoustic sim-ulations;and the correspondence among STI,RT and BNL was established,which in turn clari-fied the correspondence among speech intelligibility,RTand BNL.The results of this study canadvance the application of STl in the comprehensive evaluation of classroom acoustic environ-ment and provide a clear reference for classroom acoustic design and classroom acoustic com-fort evaluation.

关 键 词：教室声环境评价 语音传输指数 混响时间 背景噪声 

分 类 号：G63[文化科学—教育学]