Narrow directional microphone

Details Narrow directional microphone Narrow directional microphone

1986-11-17

1988-07-12

Ng, Jin F.

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

381167, 381202, H04R 132, H04R 134, H04R 700

Patent

active

047575468

ABSTRACT:
A narrow directional microphone comprising a microphone unit and an interference tube with one end covering a forward audio terminal of the microphone. The interference tube has a plurality of first openings spaced from one another axially on the tube for providing acoustic resistance. The interference tube has a plurality of second openings spaced circumferentially from the first openings about the interference tube with a diaphragm secured to the interference tube for covering the second openings.

REFERENCES:
patent: 2210415 (1940-08-01), Kellogg
patent: 3082298 (1963-03-01), Gorike
patent: 3095484 (1963-06-01), Beaverson et al.
patent: 3444955 (1969-05-01), Hoffmann
patent: 4264790 (1981-04-01), Zlevor
patent: 4340787 (1982-07-01), Gorike
patent: 4363937 (1982-12-01), Bruna

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