全封閉聲(sheng)屏(ping)障屏(ping)體(ti)(ti)使(shi)用的是(shi)鍍鋅(xin)板(ban)(ban)(ban)(ban)，鋁板(ban)(ban)(ban)(ban)，這種面板(ban)(ban)(ban)(ban)板(ban)(ban)(ban)(ban)材(cai)上布滿(man)小孔，聲(sheng)波撞到聲(sheng)屏(ping)障，就有可(ke)(ke)能陷(xian)到孔內，而板(ban)(ban)(ban)(ban)材(cai)中部是(shi)*層厚厚的吸音(yin)(yin)棉，噪音(yin)(yin)陷(xian)進內部去不容易出來，吸音(yin)(yin)棉外(wai)敷無堿恨水玻璃布，屏(ping)體(ti)(ti)表(biao)面可(ke)(ke)實施噴塑處理，防(fang)腐性強，使(shi)用壽命長。

聲(sheng)(sheng)(sheng)(sheng)波在(zai)(zai)傳播過程中(zhong)遇到全封閉(bi)聲(sheng)(sheng)(sheng)(sheng)屏(ping)(ping)障(zhang)(zhang)(zhang)時，就(jiu)應該能產(chan)生(sheng)了反射、透射和繞射三種現象(xiang)。大致屏(ping)(ping)障(zhang)(zhang)(zhang)能夠阻止直達聲(sheng)(sheng)(sheng)(sheng)的(de)(de)傳播，并(bing)使透射聲(sheng)(sheng)(sheng)(sheng)有足夠的(de)(de)衰減(jian)(jian)，而透射聲(sheng)(sheng)(sheng)(sheng)的(de)(de)影(ying)響可(ke)以忽(hu)略不計。對(dui)此(ci)，聲(sheng)(sheng)(sheng)(sheng)屏(ping)(ping)障(zhang)(zhang)(zhang)的(de)(de)隔聲(sheng)(sheng)(sheng)(sheng)效果(guo)通常可(ke)采用減(jian)(jian)噪(zao)量表示，它反映了聲(sheng)(sheng)(sheng)(sheng)屏(ping)(ping)障(zhang)(zhang)(zhang)上面介紹兩(liang)種屏(ping)(ping)蔽透聲(sheng)(sheng)(sheng)(sheng)的(de)(de)本領。在(zai)(zai)聲(sheng)(sheng)(sheng)(sheng)源和接收點(dian)之間插入同(tong)*個(ge)聲(sheng)(sheng)(sheng)(sheng)屏(ping)(ping)障(zhang)(zhang)(zhang)，設(she)屏(ping)(ping)障(zhang)(zhang)(zhang)無(wu)限長(chang)，聲(sheng)(sheng)(sheng)(sheng)波僅能從(cong)屏(ping)(ping)障(zhang)(zhang)(zhang)上方繞射以前(qian)，而在(zai)(zai)其后形(xing)成(cheng)同(tong)*個(ge)聲(sheng)(sheng)(sheng)(sheng)影(ying)區，就(jiu)象(xiang)光線被物(wu)體(ti)遮擋形(xing)成(cheng)同(tong)*個(ge)陰影(ying)那樣。在(zai)(zai)這個(ge)聲(sheng)(sheng)(sheng)(sheng)影(ying)區內，人們(men)可(ke)以感到噪(zao)聲(sheng)(sheng)(sheng)(sheng)明顯地(di)減(jian)(jian)弱了，這則是聲(sheng)(sheng)(sheng)(sheng)屏(ping)(ping)障(zhang)(zhang)(zhang)的(de)(de)減(jian)(jian)噪(zao)效果(guo)。