狭小空间条件下的声功率测量  

Sound Power Measurement in a Narrow Room

作　　者：宋雷鸣[1] 张新华[1] 刘达德 

机构地区：[1]北方交通大学机电工程学院,北京100044

出　　处：《铁道机车车辆》2000年第4期17-19,共3页Railway Locomotive & Car

摘　　要：在狭小空间如内燃机车动力室的条件下,测量柴油机表面噪声声功率时,动力室内抗性背景声很强引起较大的测量误差,从理论上分析了采用声强探头罩进行声功率测量的可行性,并进行了内燃机车柴油机表面噪声的声功率测量。In the paper, based on the problem that strong reactive background noise can bring about a big measurement error when sound power is measured in a narrow room, such as power room in a diesel locomotive, it is analyzed theoretically that sound power is measured and carried out by using sound intensity probe hood, and sound power of diesel engine surface noise is measured in a power room.

关 键 词：声功率 测量 声强探头罩 背景声 

分 类 号：U270.7[机械工程—车辆工程]