High-order directional microphone diaphragm

Details High-order directional microphone diaphragm High-order directional microphone diaphragm

2005-11-08

2005-11-08

Ni, Suhan (Department: 2643)

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Electromagnetic

C381S175000, C381S431000

Reexamination Certificate

active

06963653

ABSTRACT:
The invention features a miniature, second-order, microcrystalline silicon microphone diaphragm formed using silicon microfabrication techniques. The diaphragm is composed of two or more rigid diaphragm elements hinged to one another providing second- or higher-order response depending on the number of diaphragm elements used. The response of the differential diaphragm has a response that is highly dependent on the direction of the incident sound. The diaphragms are useful for constructing highly innovative microphones that have far greater directionality, better sensitivity, wider frequency response, and lower noise than is achievable with current technology.

REFERENCES:
patent: 1663256 (1928-03-01), Lindsey
patent: 1749635 (1930-03-01), Gerlach
patent: 5652801 (1997-07-01), Paddock
patent: 6788796 (2004-09-01), Miles et al.

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