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Acoustics. Hearing protectors - Subjective method for the measurement of sound attenuation. Original standard BS EN ISO 4869-1-2018 in PDF full version. Additional info + preview on request

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Acoustics. Hearing protectors - Estimation of effective A-weighted sound pressure levels when hearing protectors are worn. Original standard BS EN ISO 4869-2-2018 in PDF full version. Additional info + preview on request

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Acoustics. Hearing protectors - Measurement of insertion loss of ear-muff type protectors using an acoustic test fixture. Original standard BS EN ISO 4869-3-2007 in PDF full version. Additional info + preview on request

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Acoustics. Hearing protectors - Measurement of effective sound pressure levels for level-dependent sound-restoration ear muffs. Original standard BS EN ISO 4869-4-2000 in PDF full version. Additional info + preview on request

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Acoustics. Declaration and verification of noise emission values of machinery and equipment. Original standard BS EN ISO 4871-2009 in PDF full version. Additional info + preview on request

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Hardmetals. Sampling and testing of powders using sintered test pieces. Original standard BS EN ISO 4884-2019 in PDF full version. Additional info + preview on request

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