Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Patent
1988-04-28
1991-02-05
Steinberger, Brian
Communications, electrical: acoustic wave systems and devices
Signal transducers
Underwater type
367155, 128 24A, 73625, H04R 102
Patent
active
049911511
ABSTRACT:
An elastic pulse generator including a piezo-electric or magnetrostrictive transducer which is focussing or associated with a focussing device, having a plurality of elementary emitting surfaces generating elastic signals. These signals are superimposed, after propagation over a certain distance, in a focal region. Several groups of elementary emitting surfaces are periodically exciting at a predetermined rate with respective separate electric signals. The emitting surfaces belong to transducer elements electrically isolated from each other and having different transfer functions. Delay lines are provided for phase shifting the elastic signals emitted by the transducer elements.
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Drucker William A.
EDAP International
Steinberger Brian
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