全封閉(bi)聲(sheng)屏障(zhang)屏體使用(yong)的是(shi)鍍鋅板，鋁板，這種(zhong)面板板材上布滿小孔(kong)，聲(sheng)波撞(zhuang)到聲(sheng)屏障(zhang)，就有可能陷到孔(kong)內，而板材中部是(shi)*層(ceng)厚厚的吸(xi)音(yin)(yin)棉，噪(zao)音(yin)(yin)陷進內部去不容(rong)易(yi)出來(lai)，吸(xi)音(yin)(yin)棉外敷(fu)無堿恨水(shui)玻璃布，屏體表(biao)面可實(shi)施(shi)噴塑處理，防腐性強，使用(yong)壽命長。

聲(sheng)(sheng)(sheng)波(bo)在傳(chuan)播(bo)過(guo)程中遇到(dao)全封閉聲(sheng)(sheng)(sheng)屏(ping)障(zhang)時，就應該能(neng)產生了反射(she)(she)、透(tou)射(she)(she)和(he)(he)繞(rao)射(she)(she)三種現象。大致屏(ping)障(zhang)能(neng)夠阻止(zhi)直達聲(sheng)(sheng)(sheng)的傳(chuan)播(bo)，并使透(tou)射(she)(she)聲(sheng)(sheng)(sheng)有足夠的衰減，而透(tou)射(she)(she)聲(sheng)(sheng)(sheng)的影(ying)響可以忽(hu)略(lve)不計。對(dui)此，聲(sheng)(sheng)(sheng)屏(ping)障(zhang)的隔聲(sheng)(sheng)(sheng)效(xiao)果通常可采用減噪量表(biao)示(shi)，它反映(ying)了聲(sheng)(sheng)(sheng)屏(ping)障(zhang)上(shang)面介紹兩種屏(ping)蔽透(tou)聲(sheng)(sheng)(sheng)的本領。在聲(sheng)(sheng)(sheng)源和(he)(he)接收點之(zhi)間插入同*個聲(sheng)(sheng)(sheng)屏(ping)障(zhang)，設屏(ping)障(zhang)無限長，聲(sheng)(sheng)(sheng)波(bo)僅能(neng)從屏(ping)障(zhang)上(shang)方繞(rao)射(she)(she)以前，而在其(qi)后形(xing)成同*個聲(sheng)(sheng)(sheng)影(ying)區，就象光線(xian)被物(wu)體遮(zhe)擋形(xing)成同*個陰影(ying)那樣。在這個聲(sheng)(sheng)(sheng)影(ying)區內，人們(men)可以感到(dao)噪聲(sheng)(sheng)(sheng)明顯地減弱了，這則是聲(sheng)(sheng)(sheng)屏(ping)障(zhang)的減噪效(xiao)果。