NF S30-007-6*NF EN ISO 389-6:2008 Acoustics - Reference zero for the calibration of audiometric equipment - Part 6 : reference threshold of hearing for test signals of short duration
2008NF S30-007-6*NF EN ISO 389-6:2008 Acoustics - Reference zero for the calibration of audiometric equipment - Part 6 : reference threshold of hearing for test signals of short duration