through continual comparison of the pause signal with the prototypes in the interference database in this way the adaptation to th e current interference type of the prototypes similar to the current interference type can be made for example using averaging procedures or new entries can be recorded in the interference database or the prototype adaptation can be combined with new entries by exchanging the entries in the interference type database the suppression procedure can be adapted to particular customer wishes by the manufacturer and configured for different usage environments and device parameters such as band width dynamics coding modulation type and transmission frequency fig5 shows a block diagram of a circuit configuration of the procedure in reducing steady state disturbance in the voice signal according to fig5 the circuit configuration basically comprises a voice break detector 51 a start stop circuit 52 a primary memory 53 a secondary memory 54 a characteristic and period detector 55 a correlation analyser 56 a multiplier element 57 as well as a subtraction element 58 the polarity and the value of the interference signal change from period to period the aim of the procedure is to determine a steady state disturbance and to subtract it from the voice signal to do this a voice break is first established using the voice break detector 51 in order to be able to carry out a characteristic and period analysis during the voice break using the corresponding detector 55 the disturbances are only recorded in the primary memory 53 until the period of the disturbance is determined and the memory procedure is stopped using the.