1. A method of segmenting an electric signal derived from an acoustic signal into segments of the electric signal in which consecutively a number of parameters is derived from the electric signal in the form of a number of signals as a function of time, the signals of the parameters located within a time interval around each instant are taken up for consecutive instants, a transition function .0. is determined for each instant from the signals of the parameters located within the time interval corresponding to said instant, and information relating to the segments of the acoustic signal is derived from the transition functions associated with the instants, characterized in that: (a) similarity factors C.sub.ij are determined, each between two transition functions (.0..sub.i and .0..sub.j) associated with respective proximate instants i and j, and (b) a replacing transition function is derived from the transition functions of at least one group of two transition functions for which the associated similarity factor is larger than a reference value V, the said replacing transition function replacing said transition functions from which it is derived.