Electroacoustics - Specifications for personal sound exposure meters (IEC 61252:1993 + AMD1:2000 + AMD2:2017); German version EN 61252:1995 + A1:2001 + A2:2017— 35 стр.
Electroacoustics - Instruments for measurement of aircraft noise - Performance requirements for systems to measure one-third-octave band sound pressure levels in noise certification of transport-category aeroplanes (IEC 61265:1995); German version EN 61265:1995— 11 стр.