NF C97-333*NF EN 61094-3:2016 Electroacoustics - Measurement microphones - Part 3 : primary method for free-field calibration of laboratory standard microphones by the reciprocity technique
2016NF C97-333*NF EN 61094-3:2016 Electroacoustics - Measurement microphones - Part 3 : primary method for free-field calibration of laboratory standard microphones by the reciprocity technique