device comprising an acoustical module application_number US 201514858417 A description in its most general aspect the present invention relates to an acoustical module being capable of suppressing self generated acoustical signal and self generated vibrations in its most simple implementation the acoustical module comprises a sound generating receiver and two acoustical pressure pick up points where acoustical sound is allowed to enter the module one or more acoustical filters are provided between the acoustical pressure pick up points each of the two acoustical pressure pick up points picks up the following signals the acoustical module of the present invention is adapted to be positioned inside the ear channel in this position the two acoustical pressure pick up points form an outer pick up point a and an inner pick up point b as stated above each of the two acoustical pressure pick up points will pick up a self generated acoustical receiver signal s rec acc a self generated vibration receiver signal s rec vib and the external acoustical sound s ext this may be expressed as follows where s mica and s micb are microphone signals being acoustically connected to the acoustical pressure pick up points a and b respectively since the two contributions of the receiver s rec acc and s rec vib are generated by the same source they are highly correlated and may therefore be combined into one source eq 3 and 4 can be assumed as being frequency dependent but constant over time moreover the influence of the external.