Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Patent
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.
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Engineering, vol. 207, 17.1.1969, pp. 117-120, London, B. K. Gazey: "Underwater Electroaccoustic Transducers".
Commissariat a l''Energie Atomique
Jordan Charles T.
Klein Richard
Klein Siegfried
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