What is BS EN 61260-1 - Octave-band and fractional-octave-band filters about?
BS EN 61260-1 is the first part of an international multi-series standard that discusses the use of electroacoustics for various purposes.
BS EN 61260-1 specifies performance requirements for analogue, sampled data, and digital implementations of band-pass filters. The extent of the pass-band region of a filter's relative attenuation characteristic is a constant percentage of the exact mid-band frequency for all filters of a given bandwidth.
An instrument conforming to the requirements of BS EN 61260-1 may contain any number of contiguous band-pass filters covering any desired frequency range.
Performance requirements are provided for two filter classes :
Class 1