1/3 RD OCTAVE FILTER SET 1/3 - 1/1, enables the measurement of reverberation and decay times.
Features:
31 third-octave and 31 overlapping octave filters in accordance with IEC R 225-1966, DIN 45651, DIN 45652, and ANSI S1.11-1966 Class II & III requirements; and unweighted linear response
Centre frequencies from 20Hz to 20kHz, frequency range 18 Hz to 22kHz (1/3 oct.) and 14 Hz to 28 kHz (oct.), 3 Hz to 75 kHz (Lin)
