全封閉聲(sheng)(sheng)屏障屏體使用(yong)的是(shi)鍍(du)鋅(xin)板(ban)(ban)，鋁板(ban)(ban)，這種面板(ban)(ban)板(ban)(ban)材上布滿小孔(kong)，聲(sheng)(sheng)波撞到聲(sheng)(sheng)屏障，就有可能陷到孔(kong)內，而板(ban)(ban)材中部是(shi)*層厚厚的吸音(yin)棉，噪音(yin)陷進內部去不容易出來，吸音(yin)棉外敷無堿(jian)恨(hen)水玻璃布，屏體表面可實施噴塑處理，防(fang)腐性強，使用(yong)壽命長。

聲(sheng)(sheng)(sheng)(sheng)波(bo)在傳播過程中遇(yu)到全封閉聲(sheng)(sheng)(sheng)(sheng)屏(ping)(ping)障(zhang)(zhang)時，就(jiu)應該能產生了反(fan)射(she)、透(tou)射(she)和繞射(she)三種(zhong)現象。大致屏(ping)(ping)障(zhang)(zhang)能夠(gou)阻(zu)止直達(da)聲(sheng)(sheng)(sheng)(sheng)的(de)傳播，并(bing)使透(tou)射(she)聲(sheng)(sheng)(sheng)(sheng)有足(zu)夠(gou)的(de)衰減(jian)，而(er)透(tou)射(she)聲(sheng)(sheng)(sheng)(sheng)的(de)影響(xiang)可以忽(hu)略(lve)不計。對此，聲(sheng)(sheng)(sheng)(sheng)屏(ping)(ping)障(zhang)(zhang)的(de)隔聲(sheng)(sheng)(sheng)(sheng)效果通常(chang)可采(cai)用減(jian)噪量(liang)表示(shi)，它反(fan)映了聲(sheng)(sheng)(sheng)(sheng)屏(ping)(ping)障(zhang)(zhang)上面(mian)介紹兩種(zhong)屏(ping)(ping)蔽透(tou)聲(sheng)(sheng)(sheng)(sheng)的(de)本領。在聲(sheng)(sheng)(sheng)(sheng)源(yuan)和接收(shou)點之(zhi)間(jian)插(cha)入同(tong)*個(ge)聲(sheng)(sheng)(sheng)(sheng)屏(ping)(ping)障(zhang)(zhang)，設屏(ping)(ping)障(zhang)(zhang)無限長，聲(sheng)(sheng)(sheng)(sheng)波(bo)僅能從(cong)屏(ping)(ping)障(zhang)(zhang)上方繞射(she)以前，而(er)在其(qi)后形(xing)成(cheng)同(tong)*個(ge)聲(sheng)(sheng)(sheng)(sheng)影區(qu)，就(jiu)象光(guang)線(xian)被物體遮(zhe)擋形(xing)成(cheng)同(tong)*個(ge)陰影那樣。在這個(ge)聲(sheng)(sheng)(sheng)(sheng)影區(qu)內，人們(men)可以感(gan)到噪聲(sheng)(sheng)(sheng)(sheng)明顯地(di)減(jian)弱了，這則是聲(sheng)(sheng)(sheng)(sheng)屏(ping)(ping)障(zhang)(zhang)的(de)減(jian)噪效果。