Electrio-acoustic transducers

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

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Details

367155, 367123, 310337, H01L 4108, H04R 1700, H04B 1300

Patent

active

047529180

ABSTRACT:
An electro-acoustic transducer according to the invention is of the Tonpilz type comprising a stack of piezo-electric plates placed between a horn and a countermass, and electrodes inserted between the plates. Some of the electrodes are connected to a common excitation or output conductor through phase-shifting circuits which allow the electric voltage of a proportion of these electrodes to be dephased. A logic unit allows the phase-shifting of the electrodes to be distributed within the stack according to several different groupings in dependence upon frequency. One application of the invention is to the construction of long-range power sonars.

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