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US 2001/0043705 A1Published application
System consisting of a microphone and an amplifier
AssigneeSonionmicrotronic Nederland B.V.
InventorEngbert Wilmink
Life of this patent
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AssigneeSonionmicrotronic Nederland B.V.
InventorEngbert Wilmink
Estimating the term…
Microphone/amplifier system in which the microphone comprises a case with an inlet opening, a diaphragm and a backplate, and the amplifier is arranged in the case and is coupled to the diaphragm/backplate system. In the case, the diaphragm forms a first partition between a first compartment containing the inlet opening to the surroundings and a second compartment accommodating the amplifier. According to the invention, the second compartment is divided by a second partition into a first and a second subcompartment, while an opening of a predetermined volume is provided in the second partition, this volume having a magnitude such that air in the first subcompartment can be caused to vibrate only with sound vibrations of low frequencies. Through this feature, the frequency characteristic of the system can be influenced.
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,
Dependencies are inferred from the claim text.