UNE-EN 61260-2:2016/A1:2017 Electroacoustics - Octave-band and fractional-octave-band filters - Part 2: Pattern-evaluation tests (Endorsed by Asociación Española de Normalización in August of 2017.)
2017UNE-EN 61260-2:2016/A1:2017 Electroacoustics - Octave-band and fractional-octave-band filters - Part 2: Pattern-evaluation tests (Endorsed by Asociación Española de Normalización in August of 2017.)
2016UNE-EN 61260-2:2016 Electroacoustics - Octave-band and fractional-octave-band filters - Part 2: Pattern-evaluation tests (Endorsed by AENOR in July of 2016.)