SAE J2934 Laboratory Measurement of Tortuosity and Characteristic Lengths of Acoustical Materials

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Product Code:SAE J2934
Title:Laboratory Measurement of Tortuosity and Characteristic Lengths of Acoustical Materials
Issuing Committee:Acoustical Materials Committee
Scope: This SAE Recommended Practice describes a laboratory test procedure for measuring tortuosity , thermal and viscous characteristic lengths of acoustical materials for automotive and other ground transportation applications. The materials may consists of natural fibers, synthetic fibers or cellular foam materials. This method is based on measurement of acoustical quantities of the materials. Tortuosity , thermal and viscous characteristic lengths of the materials are then derived mathematically from the measured acoustical quantities.
Rationale: This SAE Recommended Practice describes a laboratory test procedure for measuring tortuosity , thermal and viscous characteristic lengths of acoustical materials for automotive and other ground transportation applications. The materials may consists of natural fibers, synthetic fibers or cellular foam materials. This method is based on measurement of acoustical quantities of the materials. Tortuosity , thermal and viscous characteristic lengths of the materials are then derived mathematically from the measured acoustical quantities.
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【英文标准名称】:Internationallampcodingsystem(ILCOS)
【原文标准名称】:国际灯具编码系统(ILCOS)
【标准号】:IEC61231-2010
【标准状态】:现行
【国别】:国际
【发布日期】:2010-01
【实施或试行日期】:
【发布单位】:国际电工委员会(IX-IEC)
【起草单位】:IEC/SC34A
【标准类型】:()
【标准水平】:()
【中文主题词】:字母数字的;类别;代码;编码;兼容性;电气工程;消息编码;荧光灯;卤素灯;高压灯;国际灯具编码系统;互换性;灯;发光二极管;低压钠蒸气灯;钠蒸气灯;钨丝灯;卤钨灯
【英文主题词】:Alphanumeric;Categories;Codes;Coding;Compatibility;Designationsystems;Electricalengineering;Encoding;Fluorescentlamps;Halidelamps;High-pressurelamps;ILCOS;Interchangeability;Internationallampcodingsystem;Lamps;LED;Lowpressuresodiumvapourlamps;Replaceability;Sodium-vapourlamps;Tungstenlamps;Tungsten-halogenlamps
【摘要】:
【中国标准分类号】:K70
【国际标准分类号】:29_140_01
【页数】:48P;A4
【正文语种】:英语