Electret condenser microphone

Details Electret condenser microphone Electret condenser microphone

2006-11-14

2006-11-14

Ni, Suhan (Department: 2615)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Microphone capsule only

C381S359000, C381S191000

Reexamination Certificate

active

07136500

ABSTRACT:
An electret condenser microphone includes a housing, a diaphragm disposed within the housing, first and second sound inlet ports and an acoustic resistive material disposed within the housing and in the acoustic path between the second inlet port and the diaphragm. The acoustic resistive may further electrically couple a backplate coupled to the diaphragm to an amplifier disposed within the housing.

REFERENCES:
patent: 2852620 (1958-09-01), Schoeps et al.
patent: 4281222 (1981-07-01), Nakagawa et al.
patent: 4456796 (1984-06-01), Nakagawa et al.
patent: 5442713 (1995-08-01), Patel et al.
patent: 6904155 (2005-06-01), Yonehara et al.
patent: 2005/0089180 (2005-04-01), Saeki et al.
patent: 1 298 958 (2003-04-01), None
patent: 2000-232700 (1999-02-01), None
Gorelik et al., “Neues Studiokondensatormikrofon PM 860”, vol. 33, No. 2, Mar. 1, 1989, pp. 26-32.

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