DIN EN ISO 389-7:2017-01
Отменен
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.
