摘要
良好的言语可懂度是教室声环境控制的主要目标。当前,教室音质设计主要依据相关规范控制混响时间(Reverberation Time,RT)和背景噪声(Background Noise Levels,BNL),但这两个参量与言语可懂度并没有直接的对应关系。与言语可懂度直接对应的客观评价参量为语音传输指数(Speech Transmission Index,STI),在教室音质评价中的应用越来越广泛,且有很大的发展空间。基于此,总结RT和BNL与STI的相关规范,梳理三者之间的关系,并基于11间教室的声学实测数据和ODEON仿真数据,建立不同背景噪声(BNL)条件下的混响时间(RT)和语音传输指数(STI)关系曲线,最后导出了与教室语音传输指数(STI)建议值对应的混响时间(RT)。研究结果可为教室声环境控制提供参考。
Good speech intelligibility is the main goal of classroom acoustic environment control.At present,it is mainly based on relevant specifications to control the Reverberation Time(RT)and Background Noise Levels(BNL)when designing classroom sound quality,but there is no direct correspondence among these two parameters and speech intelligibility.Although the Speech Transmission Index(STI),which is an objective evaluation parameter directly corresponding to speech intelligibility,is used more and more widely in classroom sound quality evaluation,there is still a lot of room for development.First,the study summarizes the relevant specifications of RT,BNL and STI,and further sorts out the relationship among the three;then,based on the measured acoustic data and ODEON simulation data of 11 classrooms,the relationship curve between RT and STI under different BNL conditions was established,and the RT value corresponding to the recommended value of STI of classroom was derived.The research results can provide references for classroom acoustic environment control.
作者
任锡洁
祝培生
陶畹琪
刘曦东
韩晓迪
刘浩成
REN Xijie;ZHU Peisheng;TAO Wanqi;LIU Xidong;HAN Xiaodi;LIU Haocheng(School of Architecture and Fine Art,Dalian University of Technology,Dalian 116024,China)
出处
《电声技术》
2020年第11期7-12,共6页
Audio Engineering
基金
国家自然科学基金项目(No.51778100
No.51278078)。
关键词
教室声环境
混响时间
背景噪声
语音传输指数
classroom acoustic environment
reverberation time
background noise level
speech transmission index
作者简介
任锡洁(1995—),女,硕士,研究方向:建筑声学;陶畹琪(1993—),女,博士,研究方向:建筑声学;通信作者:祝培生(1969-),男,博士,教授,博士生导师,研究方向:建筑声学。Email:6199@vip.sina.com。;韩晓迪(1996—),女,硕士,研究方向:建筑声学;刘浩成(1996—),男,硕士,研究方向:建筑声学。
