BRUEL & KJAER 2245 - Page 41

Sound Level Meter Types 2245 – Instruction Manual Page 41 of 110
Only 1/3-octave-band filters need to be tested. This is because the filters are digital,
and no disturbance at the filter input will show up to be greater at 1/1-octave
bandwidth than at 1/3-octave bandwidth.