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["tagid"] => int(4478195) ["id"] => string(7) "4478195" ["depart"] => string(1) "0" ["updatetime"] => int(0) ["status"] => int(99) ["_version_"] => int(1703504063280185363) ["pageurl"] => string(36) "//www.sheji456.com/ask/tlist/4478195" ["m_pageurl"] => string(34) "//m.sheji456.com/ask/tlist/4478195" } [3] => array(11) { ["tagname"] => string(18) "泡脚用啥醋好" ["inlink"] => int(0) ["addtime"] => string(10) "1598841442" ["tagid"] => int(759343) ["id"] => string(6) "759343" ["depart"] => string(1) "0" ["updatetime"] => int(0) ["status"] => int(99) ["_version_"] => int(1703503936169705472) ["pageurl"] => string(35) "//www.sheji456.com/ask/tlist/759343" ["m_pageurl"] => string(33) "//m.sheji456.com/ask/tlist/759343" } [4] => array(11) { ["tagname"] => string(21) "别墅地漏用啥好" ["inlink"] => int(0) ["addtime"] => string(10) "1594372336" ["tagid"] => int(592155) ["id"] => string(6) "592155" ["depart"] => string(1) "0" ["updatetime"] => int(0) ["status"] => int(99) ["_version_"] => 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急！室内装修隔音材料用啥的好

急！室内装修隔音材料用啥的好

浏览：35次 | 提问时间： 06-19 04:02

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空城空心空世界 06-19 04:03

吸声材料及吸声结构归纳五大类加介绍1、多孔吸声材料(1)多孔吸声材料类型包括:有机纤维材料、麻棉毛毡、无机纤维材料、玻璃棉、岩棉、矿棉脲醛泡沫塑料氨基甲酸脂泡沫塑料等聚氯乙烯和聚苯乙烯泡沫塑料属于多孔材料用于防震隔热材料较适宜;;(2)构造特征:材料内部应有大量微孔和间隙而且些微孔应尽能细小并材料内部均匀分布材料内部微孔应该互相贯通而密闭单独气泡和密闭间隙起吸声作用微孔向外敞开使声波易于进入微孔内(3)吸声特性主要高频影响吸声性能因素主要材料流阻孔隙结构因素、厚度、容重、背条件影响a.材料厚度影响任何种多孔材料吸声系数般随着厚度增加而提高其低频吸声效而对高频影响大材料厚度增加定程度吸声效提高明显了所了提高材料吸声性能而无限制地增加厚度适宜常用多孔材料厚度:玻璃棉矿棉50-150mm毛毡4---5mm泡沫塑料25-50mmb.材料容重影响改变材料容重间接控制材料内部微空尺寸般来讲多孔材料容重适当增加意味着微孔减少能使低频吸声效有所提高高频吸声性能却能下降合理选择吸声材料容重对求得佳吸声效十分重要容重过大或过小都会对多孔材料吸声性能产生利影响c.背空气层影响多空材料背有无空气层对于吸声特性有重要影响大部分纤维板状多孔材料都周边固定龙骨上离墙50-150mm距离安装材料空气层作用相当于增加了材料厚度所吸声特性随着空气层厚度增加而提高当材料离墙面安装距离(既空气层厚度)等于1/4波长奇数倍时获得大吸声系数;当空气层厚度等于1/2波长整数倍时吸声系数小d.材料表面装饰处理影响大多数吸声材料使用时常常需要进行表面装饰处理.常见方法有:表面钻孔开槽粉刷油漆利用织布穿孔板和塑料薄膜等些方法都影响材料吸声特性半穿孔矿棉吸声板增加了材料暴露声波面积既增加了有效吸声面积因此提高了材料吸声特性粉刷油漆等于材料表面上加了层高流阻材料会影响材料吸声特性特别高频段影响更显著采用金属网玻璃布和低流阻材料或选择穿孔率大于20%穿孔板做护面层时对材料吸声性能影响大若穿孔率小于20%时对高频段吸声会有影响低频影响大2、穿孔板共振吸声结构采用穿孔石棉水泥、石膏板、硬质纤维板、胶合板及钢板、铝板都作穿孔板共振吸声结构其结构共振频率附近有较大吸收适于频穿孔板共振频率公式即:;;CP;;fo

訫无杂念 06-19 04:12

--√-----HZ;;ZπL(T+δ);;fo-穿孔板共振频率HZ;;C-声速CM/S;;L-空气层厚度CM;;t-板厚度CM;;δ-孔口末端休整量CM;;P-穿孔率即穿孔面积与总面积之比3、薄膜吸声结构包括皮革、人造革、塑料薄膜等材料具有透气、柔软、受张拉时有弹性等特性吸收共振频率附近入射声能共振频率通常200~1000HZ范围大吸声系数约0.3~0.4般把作频范围吸声材料薄膜背空腔内填放多孔材料,时吸声特性取决于膜和多孔材料种类及薄膜装置方法4、薄板吸声结构把胶合板、硬质纤维板、石膏板、石棉水泥板等板材周边固定框架上连同板封闭空气层构成振动系统其共振频率多80~300HZ其吸声系数约0.2~0.5作低频吸声结构决定薄板吸声结构吸声性能主要因素有:(1)薄板质量m影响增加板单位面积重量般使其共振频率向低频移动而选用质量小透气材料皮革有利于共振频率向高频方向移动(2)背空气层厚度影响改变空气层厚度和改变板质量样共振频率也会发生变化空气层填充多孔材料使共振频率附近吸声系数有所提高;;(3)板龙骨构造及板安装方式影响由于薄板吸声结构有定低频吸声能力,而对高频吸声差因此高频时具有较强反射能力能增加室内声能扩散通过改变龙骨构造何同安装方法设计出各种形式反射面扩散面和吸声---扩散结构

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