地下空间声环境实验分析

Experimental study on acoustic environment of underground spaces

选择具有典型特征的地下车库进行地下空间声场测试,对被测试声场的重要声学指标混响时间和声压级分布进行系统分析.采用两种方法,一种方法是依据频率的高低对测试点声压级进行对比分析,另一种方法是按照距离和空间变化对测试点的实验数据整理分析,考虑典型测试点和典型衰减变化曲线,以期在分析室内声场的同时寻找具有典型特征的声学现象,为后续的研究奠定扎实的基础.

The sound field of an underground garage space with typical characteristic was measured, and two important acoustic indices including reverberation and sound pressure level distribution were analyzed systemetically. Two analysis methods including the comparison of differences at various frequencies and the examination of the distance and spatial variations were employed considering typical test points and typical attenuation curves. Based on the analysis of sound fields, it is expected that typical characteristics of the acoustic phenomenon in such spaces will be obtained, which sets up solid foundation for the future study.