摘要
交通噪声已成为城市主要污染源之一。目前控制交通噪声的主要措施是采用声屏障结构。考虑各种变化因素(表面声学特性、频率等)的影响,应用边界元方法对不同顶端结构的声屏障降噪性能进行了计算研究。通过数据的对比分析,结果表明:作全吸收处理的树杈形声屏障整体降噪效果最好。
Road traffic noise has become one of the major urban pollution sources. At present, the main measurement used to reduce traffic noise is noise barrier. Considered the effects of some factors, Boundary Element Method （BEM） was adopted to calculate barrier properties with different top shapes Spectral efficiency comparisons for the various barriers have been conducted. The results showed ‘tree＇-shaped top barrier with full absorption performed best in noise attenuation property.
出处
《噪声与振动控制》
CSCD
北大核心
2006年第3期89-91,109,共4页
Noise and Vibration Control
关键词
声学
声屏障
边界元
顶端
acoustics
noise barrier
boundary element method
top shape
