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

2005-08-09

2005-08-09

Ni, Suhan (Department: 2643)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Having electrostatic element

C381S355000, C381S396000, C029S594000

Reexamination Certificate

active

06928178

ABSTRACT:
A condenser microphone includes a housing having a bottom wall that is formed with a recess which is defined by a recess-defining wall. A condenser is disposed in the housing, defines a variable gap chamber, and covers the recess. The condenser includes a back plate that is in the form of a metal plate which is formed with a plurality of through-holes and which cooperates with the recess-defining wall to define a closed air chamber in fluid communication with the gap chamber through the through-holes.

REFERENCES:
patent: 6667189 (2003-12-01), Wang et al.
patent: 6741709 (2004-05-01), Kay et al.
patent: 6806593 (2004-10-01), Tai et al.

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