Acoustics. Hearing protectors - Determination of sound attenuation of active noise reduction earmuffs Ingestion-build-100998 BS ISO 13655 does not

BS ISO 13655 does not apply to three-filter (tristimulus) colorimeters although Annex B

suffocation

the classification of mechanical code variation and the minimum number of effective mechanical code variations of the MP is specified in BS EN 16864

and inspection documentation

thermal stresses

Acoustics. Hearing protectors - Determination of sound attenuation of active noise reduction earmuffs Ingestion-build-100998 BS ISO 13655 does not1 Scope This document is concerned with active noise reduction (ANR) earmuffs. It specifies the test methods for the determination of the active insertion loss and calculation procedures for deriving the total attenuation. For this aim, the values of sound attenuation in the passive mode also have to be known and are determined according to ISO 48691. These methods are intended for steady noise exposures and are not applicable to noises containing