Elastic pulse generator having a desired predetermined wave form

Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type

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Details

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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patent: 4639904 (1987-01-01), Riedlinger
patent: 4658828 (1987-04-01), Dory

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