Acoustics; hearing protectors; part 3: simplified method for the measurement of insertion loss of ear-muff type protectors for quality inspection purposes (ISO/TR 4869-3:1989); German version EN 24869-3:1993— 10 стр.
Testing of Elastomers - Determination of Indentation Hardness of Soft Rubber (IRHD), Hardness Testing on Specimens of Small Dimensions, Micro-testing— 2 стр.
Acoustics - Hearing protectors - Part 3: Measurement of insertion loss of ear-muff type protectors using an acoustic test fixture (ISO 4869-3:2007); German version EN ISO 4869-3:2007— 19 стр.
Hearing protectors - Safety requirements and testing - Part 3: Ear muffs attached to an industrial safety helmet; German version EN 352-3:1996— 19 стр.
Acoustics - Hearing protectors - Part 3: Measurement of insertion loss of ear-muff type protectors using an acoustic test fixture (ISO 4869-3:2007); German version EN ISO 4869-3:2007— 19 стр.
Acoustics - Hearing protectors - Part 4: Measurement of effective sound pressure levels for level-dependent sound-restoration ear-muffs (ISO/TR 4869-4:1998); German version EN ISO 4869-4:2000— 11 стр.
Acoustics - Hearing protectors - Part 2: Estimation of effective A-weighted sound pressure levels when hearing protectors are worn (ISO 4869-2:1994); German version EN ISO 4869-2:1995— 10 стр.