Patent ID: 6950529

Claim:
A system ( 1 ) consisting of a microphone and an amplifier, the microphone comprising a case ( 10 , 11 ) having case walls, at least one opening to the surroundings being provided in at least one of the case walls, the microphone further comprising a system consisting of a diaphragm ( 14 ) and a backplate ( 13 ), the amplifier ( 100 ) being arranged in the case and being coupled to the system consisting of the diaphragm ( 14 ) and the backplate ( 13 ), the diaphragm ( 14 ) in the case ( 10 , 11 ) forming a first partition between a first compartment in which the at least one opening to the surroundings terminates and a second compartment in which the amplifier is accommodated, the second compartment being essentially closed off from the surroundings, characterized in that the second compartment is divided into a first and a second subcompartment ( 19 , 20 ) by a second partition ( 15 , 17 ), an opening ( 18 ) of a predetermined volume being provided in the second partition ( 15 , 17 ), the volume ( 18 ) having a magnitude such that air in the first subcompartment ( 19 ) can be caused to vibrate only with sound vibrations of low frequencies.