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Overview - ISO 4869-3:2007 (Acoustics, ear-muff insertion loss) ISO 4869-3:2007 specifies a laboratory method to measure the insertion loss of ear-muff type hearing protectors using an acoustic test…
1 Scope This part of ISO 4869 specifies a method for measuring the insertion loss of ear-muff type hearing protectors using an acoustic test fixture . The method is applicable to the investigation of…