BS EN ISO 4869-2:1994 : Acoustics — Hearing protectors — Part 2: Estimation of effective A-weighted sound pressure levels when hearing protectors are worn
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This part of ISO 4869 describes three methods (the octave-band), HML and SNR methods) of estimating the A-weighted sound pressure levels effective when hearing protectors are worn.
BS EN ISO 4869-2:1994 : Acoustics — Hearing protectors — Part 2: Estimation of effective A-weighted sound pressure levels when hearing protectors are worn