全(quan)封閉聲屏(ping)障(zhang)屏(ping)體使用(yong)的(de)是(shi)(shi)鍍(du)鋅板(ban)，鋁板(ban)，這種面(mian)板(ban)板(ban)材(cai)上布(bu)滿小(xiao)孔，聲波撞(zhuang)到(dao)聲屏(ping)障(zhang)，就有可(ke)能陷到(dao)孔內(nei)，而板(ban)材(cai)中部是(shi)(shi)*層厚厚的(de)吸音棉(mian)，噪音陷進(jin)內(nei)部去不容易出來，吸音棉(mian)外敷無堿(jian)恨水玻璃(li)布(bu)，屏(ping)體表(biao)面(mian)可(ke)實(shi)施噴塑(su)處(chu)理，防腐性強，使用(yong)壽命長。

聲(sheng)(sheng)(sheng)波在傳播過程中遇到(dao)全封閉聲(sheng)(sheng)(sheng)屏(ping)(ping)障(zhang)(zhang)時，就應該能產生了反射(she)(she)、透射(she)(she)和繞(rao)射(she)(she)三種(zhong)現象。大致(zhi)屏(ping)(ping)障(zhang)(zhang)能夠(gou)阻止直達聲(sheng)(sheng)(sheng)的傳播，并使透射(she)(she)聲(sheng)(sheng)(sheng)有足夠(gou)的衰減(jian)，而透射(she)(she)聲(sheng)(sheng)(sheng)的影響可(ke)以(yi)忽略不計。對此，聲(sheng)(sheng)(sheng)屏(ping)(ping)障(zhang)(zhang)的隔(ge)聲(sheng)(sheng)(sheng)效(xiao)(xiao)果通常可(ke)采用減(jian)噪量表示，它反映了聲(sheng)(sheng)(sheng)屏(ping)(ping)障(zhang)(zhang)上(shang)(shang)面(mian)介紹兩種(zhong)屏(ping)(ping)蔽透聲(sheng)(sheng)(sheng)的本領。在聲(sheng)(sheng)(sheng)源和接收(shou)點之(zhi)間插(cha)入(ru)同(tong)*個聲(sheng)(sheng)(sheng)屏(ping)(ping)障(zhang)(zhang)，設屏(ping)(ping)障(zhang)(zhang)無限(xian)長(chang)，聲(sheng)(sheng)(sheng)波僅(jin)能從屏(ping)(ping)障(zhang)(zhang)上(shang)(shang)方繞(rao)射(she)(she)以(yi)前，而在其(qi)后形(xing)成同(tong)*個聲(sheng)(sheng)(sheng)影區(qu)，就象光(guang)線(xian)被物體(ti)遮擋形(xing)成同(tong)*個陰影那樣。在這(zhe)個聲(sheng)(sheng)(sheng)影區(qu)內，人們可(ke)以(yi)感(gan)到(dao)噪聲(sheng)(sheng)(sheng)明顯地(di)減(jian)弱了，這(zhe)則是(shi)聲(sheng)(sheng)(sheng)屏(ping)(ping)障(zhang)(zhang)的減(jian)噪效(xiao)(xiao)果。