Measurement microphones - Part 8: Methods for determining the free-field sensitivity of working standard microphones by comparison (IEC 61094-8:2012); German version EN 61094-8:2012 + AC:2013— 32 стр.
Electroacoustics - Methods to determine corrections to obtain the free-field response of a sound level meter (IEC 62585:2012); German version EN 62585:2012— 41 стр.
Electroacoustics - Measurement microphones - Part 3: Primary method for free-field calibration of laboratory standard microphones by the reciprocity technique (IEC 61094-3:2016 + COR1:2016); German version EN 61094-3:2016 + AC:2017-01— 33 стр.