全(quan)封閉聲屏障(zhang)屏體使(shi)用的(de)是(shi)鍍(du)鋅板(ban)，鋁板(ban)，這種面板(ban)板(ban)材上(shang)布滿小孔，聲波撞(zhuang)到(dao)聲屏障(zhang)，就(jiu)有可能陷到(dao)孔內，而板(ban)材中部是(shi)*層(ceng)厚厚的(de)吸音棉(mian)，噪音陷進(jin)內部去不容易出來，吸音棉(mian)外敷無(wu)堿恨(hen)水玻璃布，屏體表面可實施噴(pen)塑處理，防(fang)腐性(xing)強，使(shi)用壽命長。

聲(sheng)(sheng)(sheng)波(bo)在(zai)傳(chuan)播過程中遇(yu)到全封閉聲(sheng)(sheng)(sheng)屏(ping)障時，就(jiu)應該能產生了(le)反射(she)、透(tou)(tou)射(she)和繞(rao)射(she)三種現象。大致屏(ping)障能夠阻止直(zhi)達聲(sheng)(sheng)(sheng)的傳(chuan)播，并(bing)使透(tou)(tou)射(she)聲(sheng)(sheng)(sheng)有足(zu)夠的衰減，而透(tou)(tou)射(she)聲(sheng)(sheng)(sheng)的影(ying)響可以忽略不計。對此，聲(sheng)(sheng)(sheng)屏(ping)障的隔(ge)聲(sheng)(sheng)(sheng)效果(guo)通常可采(cai)用(yong)減噪量表示，它反映了(le)聲(sheng)(sheng)(sheng)屏(ping)障上面介紹兩種屏(ping)蔽透(tou)(tou)聲(sheng)(sheng)(sheng)的本(ben)領。在(zai)聲(sheng)(sheng)(sheng)源(yuan)和接收點之(zhi)間插入同(tong)*個(ge)聲(sheng)(sheng)(sheng)屏(ping)障，設屏(ping)障無限長(chang)，聲(sheng)(sheng)(sheng)波(bo)僅能從屏(ping)障上方繞(rao)射(she)以前(qian)，而在(zai)其后形成同(tong)*個(ge)聲(sheng)(sheng)(sheng)影(ying)區(qu)(qu)，就(jiu)象光線(xian)被物體(ti)遮(zhe)擋形成同(tong)*個(ge)陰(yin)影(ying)那樣。在(zai)這(zhe)個(ge)聲(sheng)(sheng)(sheng)影(ying)區(qu)(qu)內，人們可以感到噪聲(sheng)(sheng)(sheng)明顯(xian)地減弱(ruo)了(le)，這(zhe)則(ze)是(shi)聲(sheng)(sheng)(sheng)屏(ping)障的減噪效果(guo)。