全封閉聲(sheng)屏(ping)障屏(ping)體使(shi)用的(de)是鍍鋅板，鋁板，這種面板板材(cai)上(shang)布滿小孔，聲(sheng)波(bo)撞到聲(sheng)屏(ping)障，就有可(ke)能陷到孔內，而板材(cai)中部(bu)是*層(ceng)厚厚的(de)吸音棉，噪音陷進(jin)內部(bu)去不容易(yi)出來，吸音棉外敷無堿恨水(shui)玻璃布，屏(ping)體表(biao)面可(ke)實施(shi)噴塑處(chu)理(li)，防腐性強，使(shi)用壽命(ming)長。

聲(sheng)(sheng)(sheng)(sheng)波在(zai)傳播(bo)過程中遇到全封(feng)閉(bi)聲(sheng)(sheng)(sheng)(sheng)屏(ping)(ping)(ping)障(zhang)(zhang)時(shi)，就應該能產生(sheng)了(le)反射(she)、透(tou)射(she)和(he)繞(rao)射(she)三種(zhong)現(xian)象。大致(zhi)屏(ping)(ping)(ping)障(zhang)(zhang)能夠阻止(zhi)直(zhi)達聲(sheng)(sheng)(sheng)(sheng)的傳播(bo)，并使透(tou)射(she)聲(sheng)(sheng)(sheng)(sheng)有足夠的衰(shuai)減(jian)，而透(tou)射(she)聲(sheng)(sheng)(sheng)(sheng)的影(ying)(ying)響可以(yi)忽略不(bu)計。對此，聲(sheng)(sheng)(sheng)(sheng)屏(ping)(ping)(ping)障(zhang)(zhang)的隔聲(sheng)(sheng)(sheng)(sheng)效(xiao)果(guo)通常可采用減(jian)噪(zao)量表示，它(ta)反映了(le)聲(sheng)(sheng)(sheng)(sheng)屏(ping)(ping)(ping)障(zhang)(zhang)上面介紹兩種(zhong)屏(ping)(ping)(ping)蔽透(tou)聲(sheng)(sheng)(sheng)(sheng)的本領。在(zai)聲(sheng)(sheng)(sheng)(sheng)源和(he)接收點之間插入同(tong)*個(ge)(ge)聲(sheng)(sheng)(sheng)(sheng)屏(ping)(ping)(ping)障(zhang)(zhang)，設(she)屏(ping)(ping)(ping)障(zhang)(zhang)無限長，聲(sheng)(sheng)(sheng)(sheng)波僅(jin)能從(cong)屏(ping)(ping)(ping)障(zhang)(zhang)上方繞(rao)射(she)以(yi)前，而在(zai)其后形成同(tong)*個(ge)(ge)聲(sheng)(sheng)(sheng)(sheng)影(ying)(ying)區，就象光線被物體遮(zhe)擋形成同(tong)*個(ge)(ge)陰影(ying)(ying)那樣。在(zai)這個(ge)(ge)聲(sheng)(sheng)(sheng)(sheng)影(ying)(ying)區內，人們(men)可以(yi)感到噪(zao)聲(sheng)(sheng)(sheng)(sheng)明顯地減(jian)弱(ruo)了(le)，這則是聲(sheng)(sheng)(sheng)(sheng)屏(ping)(ping)(ping)障(zhang)(zhang)的減(jian)噪(zao)效(xiao)果(guo)。