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data-cmd="more"></a> <a href="#" class="bds_sqq" data-cmd="sqq" title="分享到QQ好友"></a> <a href="#" class="bds_weixin" data-cmd="weixin" title="分享到微信"></a> </div> <a href="#" class="scan" title="二維碼分享">二維碼分享 <div class="rlb7thzzbb" id="qrcode" style="display: none"> </div> </a> </span> </div> <div id="rlb7thzzbb" class="caseContainer"> <p style="text-indent:2em;"> <span style="font-size:16px;line-height:2;">什么是聲屏障？</span> </p> <p style="text-indent:2em;"> <span style="font-size:16px;line-height:2;">聲波在傳播過(guò)程中遇到聲屏障時(shí)，就會(huì )發(fā)生反射、透射和繞射三種現象。</span> </p> <p style="text-indent:2em;"> <span style="font-size:16px;line-height:2;">通常屏障能夠阻止直達聲的傳播，并使透射聲有足夠的衰減，而透射聲的影響可以忽略不計。</span> </p> <p style="text-indent:2em;"> <span style="font-size:16px;line-height:2;">因此，聲屏障的隔聲效果一般可采用減噪量表示，它反映了聲屏障上述兩種屏蔽透聲的本領(lǐng)。</span> </p> <p style="text-align:center;text-indent:2em;"> <span style="font-size:16px;line-height:2;"><img src="http://img.dlwjdh.com/upload/11990/210423/8fbf4e898d57e994eacf06a9b2df1e07.jpg" alt="" /><br /> </span> </p> <p style="text-indent:2em;"> <span style="font-size:16px;line-height:2;">聲屏障有那些用途？</span> </p> <p style="text-indent:2em;"> <span style="font-size:16px;line-height:2;">聲屏障主要用于公路、高速公路、高架復合道路和其它噪聲源的隔聲降噪，控制交通噪聲對附近城市區域的影響，也可用于工廠(chǎng)和其它噪聲源的隔聲降噪。</span> </p> <p style="text-indent:2em;"> <span style="font-size:16px;line-height:2;">聲屏障的研究在國外起步較早，國內較晚。</span> </p> <p style="text-indent:2em;"> <span style="font-size:16px;line-height:2;">設置聲屏障是控制交通噪聲的重要措施，國外對穿過(guò)市區和居住區的高速公路、鐵路、高架橋的兩側都普遍設有聲屏障，實(shí)現了其它降噪手段所不能代替的效果。</span> </p> <p style="text-indent:2em;"> <span style="font-size:16px;line-height:2;">聲屏障的兩種類(lèi)型</span> </p> <p style="text-indent:2em;"> <span style="font-size:16px;line-height:2;">國內外一系列的工程應用實(shí)例表明聲屏障在改善環(huán)境聲質(zhì)量方面是.經(jīng)濟、.有效的降噪工程設施。在現有城市交通聲屏障中，擴散反射型和吸聲共振型是兩種基本聲學(xué)元件</span> </p> <p style="text-indent:2em;"> <span style="font-size:16px;line-height:2;">■ 擴散反射型：根據國內外城市道路聲屏障的發(fā)展經(jīng)驗，擴散反射型聲屏障所使用的材料具有質(zhì)輕、透明、隔聲性能好、強度高、易安裝且施工工業(yè)化程度高的特點(diǎn)。</span> </p> <p style="text-indent:2em;"> <span style="font-size:16px;line-height:2;">■ 吸聲共振型：吸聲共振型聲屏障的優(yōu)點(diǎn)在于其聲學(xué)元件構造精細、美觀(guān)、結構自重輕、吸聲性能好而占用的建筑空間較小，它將是未來(lái)城市交通聲屏障的發(fā)展方向。</span> </p> <p style="text-indent:2em;"> <span style="font-size:16px;line-height:2;">吸聲型聲屏障采用多孔吸聲材料或吸聲結構作面層，在降低路網(wǎng)兩側噪聲量的同時(shí)可顯著(zhù)改善路網(wǎng)上的聲環(huán)境。</span> </p> <p style="text-indent:2em;"> <span style="font-size:16px;line-height:2;">特別是在路網(wǎng)兩側均設立聲屏障時(shí)更有必要采用吸聲型聲屏障，吸聲材料性能直接影響著(zhù)吸聲型聲屏障的吸聲降噪效果和制作成本。來(lái)源于網(wǎng)絡(luò )</span> </p> </div> <div id="rlb7thzzbb" class="caseTab"> <ul> <li id="rlb7thzzbb" class="col-xs-6 col-sm-6 col-md-6"> <a href="http://www.sweetk.net/meitibaodao/1414264.html">吸音材料有什么不一樣？</a> </li> <li id="rlb7thzzbb" class="col-xs-6 col-sm-6 col-md-6"> <a 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