Acoustic transducer with improved low frequency response

Details Acoustic transducer with improved low frequency response Acoustic transducer with improved low frequency response

1994-08-12

1995-09-19

Jordan, Charles T.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Receivers

381174, 381191, H04R 1904

Patent

active

054522684

ABSTRACT:
An acoustic transducer includes a perforated member; a movable diaphragm spaced from the perforated member; spring means interconnecting the diaphragm and the perforated member for movably supporting the diaphragm relative to the perforated member; a pressure equalization slot for controlling the flow of fluid through the diaphragm, the slot equalizing the pressure on opposite sides of the diaphragm for defining the low frequency response; and means for applying an electric field across the perforated member and the diaphragm for producing an output signal representative of the variation in capacitance induced by the variation of the space between the perforated member and the diaphragm in response to an incident acoustic signal.

REFERENCES:
patent: 4776019 (1988-10-01), Miyatake
patent: 4922471 (1990-05-01), Kuehnel
patent: 5146435 (1992-09-01), Bernstein
patent: 5255246 (1993-10-01), van Halteren
patent: 5303210 (1994-04-01), Bernstein

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