00973nam a22001217a 4500999001700000245015100017260006900168300001000237505049500247650001400742942000700756952008800763  c16256d16256  aISO 4869-2:1994-Acoustics - Hearing protectors - Part 2: Estimation of effective A-weighted sound pressure levels when hearing protectors are worn  aGeneva :bInternational Organization for Standardization,c1994.  a20 p.  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.  aAcoustics  cST  00104070aAIISHbAIISHd2020-06-23l0pST043r2020-06-23 00:00:00w2020-06-23yST