000			00873nam a22001097a 4500
999			_c16256 _d16256
245			_aISO 4869-2:1994-Acoustics - Hearing protectors - Part 2: Estimation of effective A-weighted sound pressure levels when hearing protectors are worn
260			_aGeneva : _bInternational Organization for Standardization, _c1994.
300			_a20 p.
505			_aDescribes three methods (the octave-band, HML and SNR methods) for estimating the A-weighted sound pressure levels effective when hearing protectors are worn. The methods are applicable to either the sound pressure level or the equivalent continuous sound pressure level of the noise. Although primarily intended for steady noise exposures, the methods are also applicable to noises containing impulsive components. They are not suitable for use with peak sound pressure level measurements.
650			_aAcoustics
942			_cST