湖南玻璃棉卷氈哪家好誠(chéng)信服務(wù) 荊州開(kāi)發(fā)區(qū)茂源保溫材料供應(yīng)-b2b網(wǎng)站_b2b電子商務(wù)平臺(tái)【買(mǎi)產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content="多空材料的空氣體積與材料的總體積之間的比例就是孔隙率，通常用百分比進(jìn)行表示。通常情況下，多孔吸聲材料的孔隙率在７０％左右，有些高達(dá)９０％左右。多空材料的孔隙比較好要細(xì)小且均勻分布，增加材料內(nèi)的筋絡(luò)面積，促進(jìn)噪音的吸收。材料厚度的影響：同一種"><meta name="keywords" content="湖南玻璃棉卷氈哪家好"><link rel="canonical" href="http://m.cdcfah.com/"/><meta name="applicable-device" content="pc"><link rel="shortcut icon" href="/static/new_net_01/images/favicon.ico"><link rel="stylesheet" href="/static/new_net_01/css/slick.css" /><link rel="stylesheet" href="/static/new_net_01/css/addnew.css"><link rel="stylesheet" href="/static/new_net_01/css/sidenav.css"><link rel="stylesheet" href="/static/new_net_01/css/style.css" /><link rel="stylesheet" href="/static/new_net_01/css/tab.css"><link rel="stylesheet" href="/static/new_net_01/css/404.css"> <meta name="baidu-site-verification" content="OBVzrC9aaQ" /> <meta http-equiv="Cache-Control" 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id="xwtl2h9" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)格要求：</span>面議</p><p><span>所在地：</span>湖北省</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>湖南玻璃棉卷氈哪家好</p><p><span>***更新：</span>2020-06-20 11:21:05</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="8inpoke" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">荊州開(kāi)發(fā)區(qū)茂源保溫材料廠</a></p><p><span>聯(lián)系人：</span>朱杰</p><p><span>郵箱: </span>1007714548@qq.com</p><p><span>電話(huà): </span>18261227725</p><p><span>傳真: </span>0716_34659425</p><p><span>網(wǎng)址: </span></p><p><span>手機(jī): </span>0716-34659425</p><p><span>地址: </span>湖北省荊州市沙市區(qū)東方大道紡印一路19號(hào)</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="k33fbdu" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="xu8yq8m" class="box"><p><p style="text-indent:25px">多空材料的空氣體積與材料的總體積之間的比例就是孔隙率，通常用百分比進(jìn)行表示。通常情況下，多孔吸聲材料的孔隙率在７０％左右，有些高達(dá)９０％左右。多空材料的孔隙比較好要細(xì)小且均勻分布，增加材料內(nèi)的筋絡(luò)面積，促進(jìn)噪音的吸收。材料厚度的影響：同一種多孔吸音材料的厚度一定，在低頻范圍內(nèi)吸聲系數(shù)相對(duì)較低，而隨著頻率的增加吸聲系數(shù)快速增加，湖南玻璃棉卷氈哪家好，達(dá)到高頻范圍時(shí)，吸聲系數(shù)的變化不明顯。但材料的厚度繼續(xù)增加，高頻吸收噪音效果增加不明顯，而厚度增加對(duì)低頻吸聲系數(shù)有較大的影響。通過(guò)實(shí)驗(yàn)表明，同一類(lèi)多孔材料，湖南玻璃棉卷氈哪家好，在堆密度相同時(shí)，厚度和頻率的乘積對(duì)吸聲系數(shù)有著決定性的作用，湖南玻璃棉卷氈哪家好。當(dāng)材料的厚度為之前的兩倍時(shí)，頻譜曲線向低頻方向移動(dòng)一個(gè)倍的頻帶。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="湖南玻璃棉卷氈哪家好" src="http://tyunfile.71360.com/UpLoadFile/maoyuanbaowen/2019/8/637012168664220917/6370121686642209173674438.jpg"></div><p style="text-indent:25px">實(shí)際應(yīng)用中具體常見(jiàn)的吸聲材料有：多孔材料，比如礦棉、玻璃棉、泡沫塑料、毛氈等，這些吸聲材料本身都具有良好的中高頻吸收，背后留有空氣層時(shí)也能吸收低頻噪聲。板狀材料，如膠合板、石棉水泥板、石膏板、硬質(zhì)板，這些吸聲材料吸收低頻比較有效。穿孔板，主要像穿孔膠合板、穿孔石棉水泥板、穿孔石膏板、穿孔金屬板等，可以吸收中頻噪聲，與多孔材料結(jié)合使用吸收中高頻噪聲，和多孔材料一樣背后留空腔，也可以吸收低頻噪音。成型頂棚吸聲板，這類(lèi)吸聲材料像礦棉吸聲板、玻璃棉吸聲板、軟質(zhì)纖維板，視質(zhì)地不同，密實(shí)不透氣的吸聲特性同硬質(zhì)板狀材料，透氣的同多孔材料。薄膜材料，如塑料薄膜、帆布、人造革等，是空氣層的厚薄而吸收低中頻噪聲。柔性材料，如海綿、乳膠塊，這類(lèi)吸聲材料內(nèi)部氣泡不連通，與多孔材料不同，主要靠共振有選擇的吸收中頻。由于各種吸聲材料的吸聲特性有所不同，吸聲材料選擇時(shí)要考慮與周?chē)鷤髀暯橘|(zhì)的聲特性阻抗匹配，使聲能可以無(wú)反射地進(jìn)入吸聲材料，并使入射聲能絕大部分被吸收。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="湖南玻璃棉卷氈哪家好" src="http://tyunfile.71360.com/UpLoadFile/maoyuanbaowen/2019/8/637012168162239820/6370121681622398202300964.jpg"></div><p style="text-indent:25px">荊州開(kāi)發(fā)區(qū)茂源保溫材料廠和大家一起來(lái)認(rèn)識(shí)下常見(jiàn)的吸聲材料有哪些。一般來(lái)說(shuō)材料吸聲主要通過(guò)兩個(gè)方面實(shí)現(xiàn)：一是靠材料本身的吸聲特性，如玻璃棉、巖棉等纖維或多孔材料。簡(jiǎn)單原理就是當(dāng)聲波入射到材料表面順著微孔穿入到內(nèi)部，由于反射摩擦以及空氣黏滯阻力，使一部分聲能損耗轉(zhuǎn)變?yōu)闊崮?，另外氣體壓縮放熱、膨脹吸熱，進(jìn)行熱交換也能使聲能被吸收。另一方面是靠吸聲結(jié)構(gòu)，其材料本身不具備吸聲特性，但經(jīng)過(guò)打孔、開(kāi)縫等加工和表面處理制成某種結(jié)構(gòu)而產(chǎn)生吸聲效果，主要有薄膜、薄板，以及空腔、穿孔板等共振吸聲結(jié)構(gòu)等。原理是共振結(jié)構(gòu)在聲波激發(fā)下振動(dòng)，振動(dòng)結(jié)構(gòu)由于本身的內(nèi)摩擦和與空氣間的摩擦把部分振動(dòng)能量轉(zhuǎn)換為熱能而消耗掉，實(shí)現(xiàn)吸聲效果。</p></p><br /><p>文章來(lái)源地址: http://m.cdcfah.com/cp/325210.html</p></div></div></div></div></div><div id="ys8t7x9" class="page-right twoColRt"><div id="8gnpwyp" class="box01 margin10 clearfix"><h3><a href="http://m.cdcfah.com/cp/">猜你喜歡</a></h3><div id="8jgsu87" class="recomPic likePro"><a href="http://m.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強(qiáng) 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