摘要
用闭孔泡沫铝板作为高速公路声屏障材料,以沈阳市东西快速干道珠林桥附近安装的几段声屏障为例,对高速公路安装声屏障前后噪声的声压级进行了实地测量,计算得出声屏障的插入损失,以此考察闭孔泡沫铝板声屏障的降噪效果.通过对闭孔泡沫铝声屏障和普通百叶声屏障降噪效果的对比分析,发现闭孔泡沫铝声屏障整体降噪效果优于普通百叶声屏障,在高速公路噪声较强的20～630 Hz频段降噪效果更佳.
The denoising effect of the sound barriers made from closed-cell aluminum foam was investigated taking some sections of the sound barriers located nearby the Zhulin Overcross of the East-West expressway in Shenyang City as examples,where the sound pressure level of noise was measured with spectrum analysis before and after setting the sound barriers there.The denoising effect of closed-cell aluminum foam was evaluated via the insertion loss calculated for such sound barriers.A comparative denoising analysis of sound barrier was made between the closed-cell aluminum foam and conventional window shutters,and the results showed that the denoising effect of the former is superior to that of the latter,especially in the highly-noisy frequency band from 20 to 630A4!Hz beside the expressway.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2011年第2期274-276,共3页
Journal of Northeastern University(Natural Science)
基金
国家高技术研究发展计划项目(2008AA03Z512)
国家自然科学基金资助项目(50774021)
关键词
降噪
闭孔泡沫铝
频谱分析
声屏障
插入损失
denoising
closed-cell aluminum foam
spectrum analysis
sound barriers
insertion loss
