Waterproof sound and vibration sensing device
AssigneeHarman International Industries, Incorporated
InventorsYu Du, Pablo Diego Regla, Péter Tamás Podlócz, Daniel Hajdu
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Abstract
A sound and vibration sensing device comprising a housing, a printed circuit board assembly (PCBA) including a sensor element supported inside the housing. A flexible and non-porous structural membrane is arranged to seal the housing at one end creating a first closed air volume below the sensor element and a second closed air volume above the sensor element wherein the sensor element measures changes in air pressure in the first closed air volume caused by vibration of the structural membrane induced by external acoustic pressure and structural vibration to output a combined sound and vibration signal.
Claims24
A sound and vibration sensing device comprising:
- a housing;
- a support structure in the housing, the support structure having first and second surfaces;
- a structural membrane that is flexible and non-porous, the structural membrane having first and second surfaces, the structural membrane being arranged to seal the housing;
- a first closed air volume defined between the second surface of the structural membrane and the first surface of the support structure;
- a second closed air volume defined between the housing and the second surface of the support structure;
- and
- a sensor element arranged on a printed circuit board assembly (PCBA) attached to the second surface of the support structure, the sensor element measures changes of air pressure in the first closed air volume caused by vibration of the structural membrane induced by external acoustic pressure and structural vibration input;
- and
- a combined sound and vibration signal output.
A sound and vibration sensing device comprising:
- a housing;
- a printed circuit board assembly (PCBA) having an aperture, the PCBA is supported inside the housing;
- a sensor element on the PCBA mounted over the aperture;
- a structural membrane that is flexible and non-porous, the structural membrane having first and second surfaces, the structural membrane being arranged to seal the housing at one end;
- a first closed air volume below the sensor element, the first closed air volume is defined inside the housing under the aperture between the PCBA and the structural membrane;
- and
- a second closed air volume above the sensor element, the second closed air volume is defined inside the housing between the housing and the PCBA;
- wherein the sensor element measures changes in air pressure in the first closed air volume caused by vibration of the structural membrane induced by external acoustic pressure and structural vibration to output a combined sound and vibration signal.
Dependencies are inferred from the claim text.