聲屏障是道路減音降噪的代表產品，那么它是如何工作的，其工作原理是怎樣的？

當噪聲(sheng)(sheng)(sheng)(sheng)源發(fa)出的聲(sheng)(sheng)(sheng)(sheng)波遇到(dao)聲(sheng)(sheng)(sheng)(sheng)屏(ping)(ping)障(zhang)(zhang)時(shi)，它將(jiang)沿著(zhu)兩條(tiao)方向(xiang)傳(chuan)播：一(yi)部分(fen)將(jiang)繞過(guo)聲(sheng)(sheng)(sheng)(sheng)屏(ping)(ping)障(zhang)(zhang)頂部到(dao)達聲(sheng)(sheng)(sheng)(sheng)音(yin)接收點(dian)其中(zhong)(zhong)一(yi)些(xie)穿過(guo)聲(sheng)(sheng)(sheng)(sheng)屏(ping)(ping)障(zhang)(zhang)到(dao)達聲(sheng)(sheng)(sheng)(sheng)音(yin)接收點(dian)。其中(zhong)(zhong)一(yi)些(xie)在聲(sheng)(sheng)(sheng)(sheng)屏(ping)(ping)障(zhang)(zhang)的壁面上(shang)產生反射。聲(sheng)(sheng)(sheng)(sheng)屏(ping)(ping)障(zhang)(zhang)的插入損耗(hao)主要取決于(yu)聲(sheng)(sheng)(sheng)(sheng)源發(fa)出的聲(sheng)(sheng)(sheng)(sheng)波沿這三(san)條(tiao)路(lu)徑傳(chuan)輸的聲(sheng)(sheng)(sheng)(sheng)能分(fen)布。

射穿聲(sheng)(sheng)(sheng)第(di)一道(dao)防(fang)線頂上衍(yan)(yan)(yan)射入讀取(qu)點的(de)(de)(de)聲(sheng)(sheng)(sheng)能(neng)乘以不存在聲(sheng)(sheng)(sheng)第(di)一道(dao)防(fang)線的(de)(de)(de)可以聲(sheng)(sheng)(sheng)能(neng)可以響(xiang)(xiang)聲(sheng)(sheng)(sheng)和(he)衍(yan)(yan)(yan)射響(xiang)(xiang)聲(sheng)(sheng)(sheng)的(de)(de)(de)聲(sheng)(sheng)(sheng)級之差稱呼衍(yan)(yan)(yan)射響(xiang)(xiang)聲(sheng)(sheng)(sheng)衰減(jian)(jian)。其值由標記(ji)Ld表示，并隨著(zhu)φ角的(de)(de)(de)增加而增加聲(sheng)(sheng)(sheng)屏(ping)(ping)障的(de)(de)(de)衍(yan)(yan)(yan)射聲(sheng)(sheng)(sheng)衰減(jian)(jian)是(shi)聲(sheng)(sheng)(sheng)源、聲(sheng)(sheng)(sheng)接收點和(he)聲(sheng)(sheng)(sheng)屏(ping)(ping)障的(de)(de)(de)幾(ji)何(he)關(guan)系和(he)頻(pin)率(lv)的(de)(de)(de)函(han)數。它(ta)是(shi)決定(ding)聲(sheng)(sheng)(sheng)屏(ping)(ping)障插(cha)入損耗的(de)(de)(de)主要物(wu)理量。