Recommendation ITU-T P.56 describes an easy to implement method to objectively determine the active speech level. It also acts as a reference against which other methods can be compared. The purpose of this Recommendation is not to exclude any other method but to ensure that results from different methods give the same result. The main body of this recommendation applies for wide band (WB) speech signals. Annex B provides the necessary information on how to use the active speech level meter for super-wideband (SWB) signals. Annex C provides the necessary information on how to use the active speech level meter for full band (FB) signals.