KS C IEC 61094-3A-2017 Electroacoustics — Measurement microphone — Part 3: Primary method for free-field calibration of laboratory standard microphones by the reciprocity technique
2017KS C IEC 61094-3A-2017 Electroacoustics — Measurement microphone — Part 3: Primary method for free-field calibration of laboratory standard microphones by the reciprocity technique