ASTM E966建筑物表面和表面构件气载声音隔离的现场测量标准指南
日期:2012-02-08 11:52
exposed to outdoor sound, testing with just one surface exposed to test sound will result in a greater OINR than when all surfaces are exposed to test sound. The difference is negligible when the OITC of the unexposed surface is at least 10 greater than the OITC of the exposed surface.
1. Scope
1.1 This guide may be used to determine the outdoor-indoor noise reduction (OINR), which is the difference in sound pressure level between the free-field level outdoors in the absence of the structure an
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