OIML Recommendation R 130

Octave-band and one-third-octave-band filters

Scope: This Recommendation deals with sets of octaveband and one-third-octave-band filters (filter sets), i.e. devices capable of providing, or designed for operation with devices capable of providing, time-average levels of frequency-band-filtered spectral information for a wide variety of signals, for example, time-varying, intermittent, and steady; broadband and discrete frequency; and long and short durations.