一种吸声系数现场测量装置  

Sound Absorption Coefficient Field Measuring Device in-situ

作　　者：谢荣基[1] 桂桂[1] 万宇鹏 姚小兵[1] 李冬梅[1] 

机构地区：[1]中国测试技术研究院,成都610021

出　　处：《四川环境》2017年第4期8-13,共6页Sichuan Environment

基　　金：四川省科技计划项目(2014GZ0020)

摘　　要：为了解决现有降噪材料吸声系数测量方法缺陷,实现对材料现场安装后的吸声系数进行测量,研制了一套测量现场吸声系数的装置。该装置在脉冲反射法基础上,结合了时选窗技术和波形消除技术。使用研制的测量装置在现场进行吸声系数测量,并将测量结果与混响室法和驻波管法测量结果等进行了比较分析。To solve the defects of the existing methods for measuring the sound absorption coefficient, and to realize testing the sound absorption coefficient in-situ, an in-situ sound absorption coefficient measurement setup is developed. The in-situ measurement device was developed based on the sound reflection method, combined with the time selection window and wave elimination technology. The sound absorption coefficient wass measured by the developed measuring device in-situ, and the results were compared with those obtained by the reverberation chamber method and the standing wave tube method.

关 键 词：吸声系数现场测量 脉冲反射法 时选窗技术 指向性声源 

分 类 号：X839.1[环境科学与工程—环境工程]