Microphone system having pressure-gradient capsules

Details Microphone system having pressure-gradient capsules Microphone system having pressure-gradient capsules

2005-09-30

2011-10-11

Kuntz, Curtis (Department: 2614)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Housed microphone

C381S355000, C381S356000, C381S369000

Reexamination Certificate

active

08036412

ABSTRACT:
A microphone system may include a housing having a housing opening. Pressure-gradient capsules may be provided in the housing. The capsules may include a diaphragm and at least one sound entry opening. One sound entry opening may be connected with a front side of the diaphragm in an acoustically conductive manner and another sound entry opening may be connected with a rear side of the diaphragm in an acoustically conductive manner. The sound entry openings may be located in each of the pressure-gradient capsule on an entry surface. The diaphragms of the pressure-gradient capsules may be oriented substantially parallel to each other. The sound entry opening may be directed into a space, which may be closed in a direction perpendicular to the entry surface. The space may be connected to the housing opening in an acoustically conductive manner. The microphone system may be compact and robust, and it may be suitable for use with hands-free devices.

REFERENCES:
patent: 5703957 (1997-12-01), McAteer
patent: 6597793 (2003-07-01), Darbut et al.
patent: 6614911 (2003-09-01), Watson et al.
patent: 6788791 (2004-09-01), Smith et al.
patent: 6885751 (2005-04-01), Pribyl
patent: 7106876 (2006-09-01), Santiago
patent: 7146013 (2006-12-01), Saito et al.
patent: 2003/0165251 (2003-09-01), Pribyl
patent: 1 351 549 (2003-10-01), None

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