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聲屏障屏體
瀏覽: 發布日期:2019-06-11
       聲屏障,主要用于公路、高速公路、高架復合道路和其它噪聲源的隔聲降噪。分為純隔聲的反射型聲屏障,和吸聲與隔聲相結合的復合型聲屏障。聲屏障高度在1m一5m間,覆蓋有效區域平均降噪達10~15dB(A)(125Hz~40000Hz,1/3倍頻程),最高達20dB(A)。一般來講,聲屏障越高,或離聲屏障越遠,降噪效果就越好。
 
       普通聲屏障大都采用百葉窗型聲屏障或者珍珠巖棉型聲屏障,泡沫鋁聲屏障除結構簡單,耐候性好,安裝簡單方便。此外,由于泡沫鋁材料的特點,不但可以中斷噪聲傳播到接受者,同時對噪聲源可以通過泡壁振動變成熱能或者發生共振吸收噪聲源能量,使噪聲盡量少的反射回去對高速列車車內噪聲造成二次污染。泡沫鋁還具有良好的耐候性,使聲屏障使用周期延長,降噪效果不隨氣候變化而變化。
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