Reference zero for the calibration of audiometric equipment - Part 3: Reference equipment threshold force levels for pure tones and bone vibrators (ISO 389-3:1994, including Technical Corrigendum 1:1995)— 16 стр.
Electroacoustic - Equipment for the measurement of real-ear acoustical characterics of hearing aids (IEC 61669:2001); German version EN 61669:2001— 21 стр.
Acoustics - Reference zero for the calibration of audiometric equipment - Part 7: Reference threshold of hearing under free-field and diffuse-field listening conditions (ISO 389-7:2005 + Amd 1:2016); German version EN ISO 389-7:2005 + A1:2016— 18 стр.