Specification for measurement microphones. Primary method for free-field calibration of laboratory standard microphones by the reciprocity technique— 24 стр.
Electroacoustics - Simulators of human head and ear -- Part 3: Acoustic coupler for the calibration of supra-aural earphones used in audiometry (IEC 60318-3:2014) (english version)
Measurement microphones -- Part 8: Methods for determining the freefield sensitivity of working standard microphones by comparison (IEC 61094-8:2012) (english version)