Abstract: The present invention relates to a method for eliminating noise in a signal. The frequency band of the signal is divided into sub-bands, whereafter the useful value of the signal of each sub-band is determined by comparing the signal level to a reference level, in which case a constant signal of substantially the same level as the reference level is suppressed as noise and a varying signal, defined as a useful signal, is combined, unsuppressed, with the useful signals of the other sub-bands. The frequency band of the channel is divided into sub-bands by means of an all-pass filter construction. The method can be implemented using an analog or a digital filter construction.