Microphone device

Details Microphone device Microphone device

2009-07-13

2011-12-13

Le, Huyen D (Department: 2614)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Microphone capsule only

C381S355000

Reexamination Certificate

active

08077885

ABSTRACT:
A microphone device includes an enclosure, a nontransparent supporter, a light source, an annular-shaped optical sensor, a lens and a vibrating membrane. The enclosure has a bottom portion and a sidewall extending from the bottom portion. An opening is defined in the enclosure and opposite to the bottom portion. A nontransparent supporter is enclosed in the enclosure and positioned on the bottom portion. A passage is defined in the supporter, and has a first aperture and a second aperture at two opposite ends. The first aperture is adjacent to the bottom portion. The light source is positioned on the bottom portion, received in the passage and adjacent to the first aperture. The optical sensor is positioned on the supporter. The lens is received in the optical sensor and positioned on the supporter and covers the second aperture. The vibrating membrane is supported on the sidewall.

REFERENCES:
patent: 4422182 (1983-12-01), Kenjyo
patent: 5262884 (1993-11-01), Buchholz
patent: 5621806 (1997-04-01), Page et al.

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