Directional electro-acoustic transducers comprising a sealed sel

Details Directional electro-acoustic transducers comprising a sealed sel Directional electro-acoustic transducers comprising a sealed sel

1989-04-28

1996-08-13

Eldred, J. Woodrow

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

367159, 367163, 367174, H04R 1700

Patent

active

055463614

ABSTRACT:
The invention relates to directional electro-acoustic transducers compris a sealed shell consisting of two portions.
A transducer according to the invention comprises one or more electro-acoustic drivers (1) composed for example of a stack of piezoelectric plates (1a, 1b, . . . 1n) located inside a sealed shell. This shell comprises a first portion (3A) symmetrical as to a plane (PP') fitted with two flanges at its ends, these flanges being coupled mechanically and acoustically by means of a rod (7) and two bolts (8) With each driver (1). The shell includes a second portion (3b) which is complementary to the first portion and which is acoustically uncoupled from the first portion and from the drivers.
An application of the invention is the construction of low-frequency transmitter of acoustic waves in the water in a given direction.

REFERENCES:
patent: 4462093 (1984-07-01), Upton
patent: 4706230 (1987-11-01), Inoue et al.
patent: 4845688 (1989-07-01), Butler

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