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本文在测量调查基础上分析万人大礼堂原扩声系统听不清楚的原因。在改建设计中采用集中式扩声系统，以恒指向性扬声器分区覆盖全场，解决会议和演出的需要。扩声系统安装调试后，作全面电声测量，文中列举系统的实测电气特性和场内声学指标和ＲＡＳＴＩ指数测量值。经多次重要会议和演出的实际使用反映良好。最后，对扩声改建和实测结果进行讨论，以及本改建工程优缺点，测量数值及今后特大型会堂的混响时间及扩声系统提出意见。
Based on the survey survey, this article analyzes the reason why the original sound reinforcement system in the People’s Auditorium was unclear. In the remodeling design, a centralized sound reinforcement system was used to cover the entire stadium with constant directional loudspeakers to meet the needs of conferences and performances. After the sound reinforcement system is installed and debugged, a full-scale electro-acoustic measurement is made. The measured electrical characteristics of the system and the acoustic indexes in the field and the measured values of the RASTI index are listed in the text. The actual use of many important conferences and performances reflected well. Finally, discuss the results of sound reinforcement and reconstruction, as well as the results of the measurement, as well as the advantages and disadvantages of the reconstruction project, the measurement values, and the reverberation time and sound reinforcement system of the extra large hall in the future.