Acoustics – Diaphragm – Microphone type
Patent
1990-08-07
1992-04-14
Adams, Russell E.
Acoustics
Diaphragm
Microphone type
181164, 181173, 381153, 381169, 381205, G10K 1300, H04R 2500
Patent
active
051039273
ABSTRACT:
This is a highly directional floor microphone. A pair of hinged panels rest upon the floor. A compliance may be used to acoustically seal the panels to the floor. At the apex of the floor and hinge is a transducer. The hinged panels are trapezoidal in shape and the hinge is acoustically opaque. The floor increases the directivity 6 dB. The panels increase the directivity by 12 dB. Tapering the panels in a trapezoidal shape increases the directivity by 2 dB. The total increase in directivity is 20 dB, allowing a working distance of ten times that of an omni-directional microphone. The folding nature allows easy storage and carriage.
REFERENCES:
patent: 1986609 (1935-01-01), Snoek
patent: 3032138 (1962-05-01), Haerther, Jr.
patent: 4314098 (1982-02-01), Maerfeld
patent: 4836326 (1989-06-01), Wehner
Adams Russell E.
Downey Robert
Noh Jae
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