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id="ugsai2004i" class="title"> 新聞中心 <span id="ugsai2004i" class="weizhi"><a href="/">首頁(yè)</a> >> <a href="/article/">新聞中心</a> </span> </div> <div id="ugsai2004i" class="news-detail-content"> <div id="ugsai2004i" class="news-detail-title"> <div id="ugsai2004i" class="h3">消聲量與消聲器的形式</div> <div id="ugsai2004i" class="b">發(fā)布時(shí)間：2024-02-21 瀏覽：77次</div> </div> <div id="ugsai2004i" class="news-detail"> <p><br/></p><p><br/></p><p>　　阻性消聲器主要是利用多孔吸聲材料來(lái)降低噪聲的。把吸聲材料固定在氣流通道內壁上，或使之按照一定的方式在管道中排列，就構成了阻性消聲器。當聲波進(jìn)入阻性消聲器時(shí)，一部分聲能在多孔材料的孔隙中摩擦而轉化熱能耗掉，使通過(guò)消聲器的聲波減弱。阻性消聲器就好像電學(xué)上的純電路，吸聲材料類(lèi)似于電阻。在消聲器中，吸聲材料把聲能轉換成熱能耗掉，在電路中電阻把轉換成熱能耗掉。由于人們對電學(xué)知識的普遍了解，因此把這種消聲器定名為阻性消聲器，同時(shí)，也稱(chēng)吸聲材料為阻性材料，阻性消聲器具有能在較寬的中高頻范圍內消聲，特別是對于刺耳的高頻聲效果等優(yōu)點(diǎn)。它的缺點(diǎn)是在高溫、高速、水蒸氣、含塵、油霧以及對吸聲材料有腐蝕性氣體中，使用壽命短，消聲效果差。另外，對于低頻噪聲，它的消聲效果也不夠理想，</p><p>　　阻性消聲器的消聲量與消聲器的形式、長(cháng)短、通道截面積有關(guān)，同時(shí)與吸聲材料的種類(lèi)、密度和厚度等因素也有關(guān)。</p><p>　　阻性消聲器一般有管式、片式、蜂窩式、折板式和聲流式等幾種。</p><p><br/></p> </div> <div 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