A comprehensive acoustical measurement was conducted in a traditional Chinese assembly theater,the theater of Guangdong assembly hall in Tianjin.The measured parameters include reverberation time,clarity,lateral reflection ratio and IACC.Primary analysis was done for the test result.
在模拟教室的空间内设计上方和侧向早期反射声,测量分析早期反射声对声学参数的影响。测量结果表明,早期反射声对公共广播系统语言传输指数(Speech Transmission Index for Public Address,STIPA)的影响机制不同,且受环境噪声干扰。其中,无噪声干扰下的STIPA和房间声学参数G、C50,随早期反射声能的增加而增加;早期衰变时间(Early Decay Time,EDT)随早期反射声能的增加而降低。基于此,分析了反射声与直达声的声能比,及其与STIPA、G、C50及EDT的关系。
