Condenser microphone and method for making the same

Details Condenser microphone and method for making the same Condenser microphone and method for making the same

2007-05-29

2007-05-29

Tran, Sinh (Department: 2615)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Microphone capsule only

C381S181000

Reexamination Certificate

active

10755987

ABSTRACT:
A condenser microphone includes a condenser housing defining an inner space therein, and a variable gap condenser enclosed in the condenser housing. The variable gap condenser includes an insulating substrate, a conductive fixed back plate mounted securely on the insulating substrate, a diaphragm unit movable relative to the back plate in a first transverse direction relative to the back plate, and a spacer unit interposed between and in contact with the back plate and the diaphragm unit so as to define a variable gap thereamong. The spacer unit defines at least an air passage that extends in a second transverse direction relative to the first transverse direction and that is in spatial communication with the inner space and the variable gap.

REFERENCES:
patent: 6738484 (2004-05-01), Nakabayashi
patent: 6741709 (2004-05-01), Kay et al.
patent: 7062052 (2006-06-01), Kajihara et al.

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