DS DS/EN ISO 4869-2/AC
DS DSEN SO 4869-2AC 2007-OCT-18 Acoustcs - Hearng protectors - Part 2 Estmaton of effectve A-weghted sound pressure levels when hearng protectors are worn
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This standard specifies three methods (the octave-band, HML and SNR methods) of estimating the A-weighted sound pressure levels effective when hearing protectors are worn.