隨(sui)著城市(shi)建(jian)(jian)設的(de)(de)發展(zhan)，城市(shi)主干(gan)路(lu)和高架橋多建(jian)(jian)在城市(shi)中(zhong)心范圍，控(kong)制路(lu)線與人(ren)的(de)(de)居住(zhu)、活(huo)動、工作場所的(de)(de)距離有(you)時很難做到。隨(sui)著交通(tong)干(gan)線的(de)(de)延伸、擴展(zhan)和立交橋的(de)(de)建(jian)(jian)成，以及機動車數量的(de)(de)猛增，臨路(lu)居民(min)日益(yi)明顯地感到交通(tong)噪聲(sheng)污染(ran)的(de)(de)危(wei)害，尤其是(shi)在夏季，住(zhu)在低層樓(lou)房內的(de)(de)居民(min)開窗通(tong)風，噪聲(sheng)污染(ran)更(geng)是(shi)突出。交通(tong)噪聲(sheng)是(shi)我(wo)國(guo)城市(shi)環境噪聲(sheng)產(chan)生(sheng)的(de)(de)主要原因之(zhi)一，它(ta)嚴(yan)重干(gan)擾了人(ren)們的(de)(de)工作、學習和生(sheng)活(huo)，使人(ren)心煩意亂，導致疲勞，損害聽覺，對人(ren)體(ti)健康產(chan)生(sheng)多方面的(de)(de)危(wei)害，引發各種疾病。

  我們先來(lai)看一(yi)(yi)下聲(sheng)(sheng)(sheng)(sheng)屏(ping)(ping)(ping)(ping)(ping)障(zhang)的原理:當(dang)噪聲(sheng)(sheng)(sheng)(sheng)源發出(chu)的聲(sheng)(sheng)(sheng)(sheng)波(bo)遇到(dao)聲(sheng)(sheng)(sheng)(sheng)屏(ping)(ping)(ping)(ping)(ping)障(zhang)時,它將(jiang)沿(yan)著三條(tiao)(tiao)路徑傳播：一(yi)(yi)部(bu)分(fen)越過聲(sheng)(sheng)(sheng)(sheng)屏(ping)(ping)(ping)(ping)(ping)障(zhang)頂端繞射到(dao)達受聲(sheng)(sheng)(sheng)(sheng)點(dian)；一(yi)(yi)部(bu)分(fen)穿透(tou)聲(sheng)(sheng)(sheng)(sheng)屏(ping)(ping)(ping)(ping)(ping)障(zhang)到(dao)達受聲(sheng)(sheng)(sheng)(sheng)點(dian)；一(yi)(yi)部(bu)分(fen)在(zai)聲(sheng)(sheng)(sheng)(sheng)屏(ping)(ping)(ping)(ping)(ping)障(zhang)壁面上(shang)產生反射。由于聲(sheng)(sheng)(sheng)(sheng)屏(ping)(ping)(ping)(ping)(ping)障(zhang)的插(cha)入，聲(sheng)(sheng)(sheng)(sheng)屏(ping)(ping)(ping)(ping)(ping)障(zhang)后形成聲(sheng)(sheng)(sheng)(sheng)影區，也(ye)就是(shi)聲(sheng)(sheng)(sheng)(sheng)屏(ping)(ping)(ping)(ping)(ping)障(zhang)能起作用的區域，也(ye)是(shi)需要保護的噪聲(sheng)(sheng)(sheng)(sheng)敏感點(dian)所在(zai)的區域。聲(sheng)(sheng)(sheng)(sheng)屏(ping)(ping)(ping)(ping)(ping)障(zhang)的降(jiang)噪量主要取決于聲(sheng)(sheng)(sheng)(sheng)源發出(chu)的聲(sheng)(sheng)(sheng)(sheng)波(bo)沿(yan)這(zhe)三條(tiao)(tiao)路徑傳播的聲(sheng)(sheng)(sheng)(sheng)能分(fen)配(pei)。

  聲(sheng)屏障(zhang)具有(you)以(yi)下優(you)點:1、組(zu)合式設計，靈活自(zi)(zi)如，安裝拆(chai)卸快捷(jie)方便；2、聲(sheng)學性能優(you)越，滿足各(ge)領(ling)域對聲(sheng)屏障(zhang)的要求(qiu)；3、造價低，生產成本低；4、可塑性高，可根據周圍(wei)環境自(zi)(zi)由(you)搭配材質顏色結構等

  聲(sheng)(sheng)(sheng)屏(ping)(ping)(ping)(ping)障總體可(ke)分為(wei)純隔(ge)聲(sheng)(sheng)(sheng)的反射型(xing)聲(sheng)(sheng)(sheng)屏(ping)(ping)(ping)(ping)障和吸聲(sheng)(sheng)(sheng)與隔(ge)聲(sheng)(sheng)(sheng)相結合的復(fu)合型(xing)聲(sheng)(sheng)(sheng)屏(ping)(ping)(ping)(ping)障。聲(sheng)(sheng)(sheng)屏(ping)(ping)(ping)(ping)障另按外(wai)觀形狀可(ke)以分為(wei)直立式聲(sheng)(sheng)(sheng)屏(ping)(ping)(ping)(ping)障、折臂(bei)式聲(sheng)(sheng)(sheng)屏(ping)(ping)(ping)(ping)障、傾(qing)斜式聲(sheng)(sheng)(sheng)屏(ping)(ping)(ping)(ping)障、封閉型(xing)聲(sheng)(sheng)(sheng)屏(ping)(ping)(ping)(ping)障等。按材質也(ye)可(ke)以分為(wei)金屬聲(sheng)(sheng)(sheng)屏(ping)(ping)(ping)(ping)障、混(hun)凝土聲(sheng)(sheng)(sheng)屏(ping)(ping)(ping)(ping)障、PC聲(sheng)(sheng)(sheng)屏(ping)(ping)(ping)(ping)障、玻璃鋼(gang)聲(sheng)(sheng)(sheng)屏(ping)(ping)(ping)(ping)障等。按不同用(yong)途還(huan)可(ke)以分為(wei)鐵路聲(sheng)(sheng)(sheng)屏(ping)(ping)(ping)(ping)障、公里(li)聲(sheng)(sheng)(sheng)屏(ping)(ping)(ping)(ping)障、城市景觀聲(sheng)(sheng)(sheng)屏(ping)(ping)(ping)(ping)障、居民區(qu)降噪聲(sheng)(sheng)(sheng)屏(ping)(ping)(ping)(ping)障等。聲(sheng)(sheng)(sheng)屏(ping)(ping)(ping)(ping)障用(yong)途廣(guang)泛，不管是城市還(huan)是工廠(chang)、高速公路都(dou)有它(ta)的身影。