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BS-EN ISO 4869-2-1995

Published November 1, 2018 at 520 × 800 in The SNR – what does it mean, and how do you use this figure to determine the effectiveness of a hearing protector?.
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From the octave band attenuation performance of the hearing protector (derived from a test defined in a BS EN standard), the SNR performance can be calculated (by a method prescribed using a BS EN ISO standard) and be published by the manufacturer.

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