ASTM E413隔音等级的分类
日期:2012-02-08 11:00
fer by only one or two points.
1. Scope
1.1 This classification covers methods of calculating single-number acoustical ratings for laboratory and field measurements of sound attenuation obtained in one-third octave bands.
1.2 The name given to the single-number rating is assigned by the test method that invokes this classification.
1.3 Test methods that invoke this classification include:
1.3.1 Test Method E90The single-number rating is called sound transmission class (STC).
1.3.2 Test Method E3
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