Electroacoustic transducer

Details Electroacoustic transducer Electroacoustic transducer

1976-01-19

1977-04-26

Stellar, George G.

179115V, H04R 900

Patent

active

040202968

ABSTRACT:
The present invention is directed to an improved electroacoustic transducer of the type in which electrical conductors are mounted over a substantial portion of the radiating area of a movable diaphragm, characterized in that the electromagnetic forces exerted on the diaphragm are linear throughout the entire excursion of the diaphragm. The apparatus includes an acoustically transparent solenoid member having spaced-apart turns, the diaphragm being disposed within the area bounded by the solenoid turns, and having a conductor mounted on or comprising the diaphragm. A D.C. current is passed through the coil while the output of an audio amplifier is impressed on the conductor. The above arrangement is unique in that the flux density within the area bounded by the solenoid being essentially equal at all points, the conductor is subjected to essentially constant magnetic forces, notwithstanding its position within the solenoid.

REFERENCES:
patent: 1955390 (1934-04-01), Schiffl
IBM Technical Disclosure Bulletin vol. 6 No. 7 Dec. 1963, pp. 87-88 "Electromagnetic Transducer" J.J. Colligan et al.

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