摘要
应用间接边界元法，分析在道路交通噪声等效频率400Hz时，对于顶端带吸声柱体声屏障，吸声柱体在不同直径时插入损失的变化规律。指出通过在声屏障顶端增加吸声圆柱体来提高声屏障的插入损失时，顶端吸声柱体的直径宜大于0．3m，其附加衰减可达2-5dB，最后进行了案例分析，为声屏障优化设计提供定量依据及参考。
insertion loss of barrier with absorptive cylinder at the edge was calculated at 400Hz （ the equivalent frequency of transportation noise ） by IBEM, additional attenuation of absorptive cylinder with different dimension was analyzed, These conclusions was presented ： The dimension should be over 0.3m for improving the insertion loss by changing the barrier edge with the absorptive cylinder, and additional attenuation would be 2 -SdB. At last, the case studies were implemented; it will provide reference for optimum design of noise barrier.
出处
《噪声与振动控制》
CSCD
北大核心
2006年第6期80-82,共3页
Noise and Vibration Control
关键词
声学
声屏障
吸声柱体
插入损失
acoustics
noise barrier
absorptive cylinder
insertion loss
