Omnidirectional transducer of elastic waves with a wide pass ban

Details Omnidirectional transducer of elastic waves with a wide pass ban Omnidirectional transducer of elastic waves with a wide pass ban

1985-08-21

1988-11-01

Jordan, Charles T.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

367172, 367174, H04R 1500

Patent

active

047824719

ABSTRACT:
Omnidirectional, wide pass band, elastic wave transducer comprising a rigid magnetostrictive diaphragm, each surface element of the diaphragm constituting a unidirectional elastic wave transducer in its normal direction, and an electric control means provided with two electric terminals for producing in the vicinity of the diaphragm a homogeneous magnetic field in keeping with an electric signal applied to the terminals of the control means or for supplying an electric signal in keeping with the variation of the magnetic field in the diaphragm as a function of an elastic wave received. The diaphragm is preferably a closed surface of revolution.
Application in submarine transmission (hydrophone) and in high fidelity sound reproduction (loudspeaker, microphone) with a very wide pass band.

REFERENCES:
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Engineering, vol. 207, 17.1.1969, pp. 117-120, London, B. K. Gazey: "Underwater Electroaccoustic Transducers".

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