IEC 60107-2:1980 Recommended methods of measurement on receivers for television broadcast transmission. Part 2 : Electrical and acoustic measurements at audio-frequencies
1997IEC 60107-2:1997 Methods of measurement on receivers for television broadcast transmissions - Part 2: Audio channels - General methods and methods for monophonic channels
1980IEC 60107-2:1980 Recommended methods of measurement on receivers for television broadcast transmission. Part 2 : Electrical and acoustic measurements at audio-frequencies