ASTM E413隔音等级的分类
日期:2012-02-08 11:00
instruments, many music systems, and transportation noises such as motor vehicles, aircraft and trains. For these sources, accurate assessment of sound transmission requires a detailed analysis in frequency bands. A single-number sound transmission rating for building fa�ade elements is given in Classification E1332.
The single-number ratings obtained can be used to compare the potential sound insulation of partitions or floors tested in laboratory conditions (STC) or the actual sound isolation b
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10/31 09:17