Signal sensor insensitive to static pressure variations

Details Signal sensor insensitive to static pressure variations Signal sensor insensitive to static pressure variations

1989-12-22

1991-02-26

Jordan, Charles T.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

367166, 367167, 367171, 367172, 310337, H04R 1700

Patent

active

049966758

ABSTRACT:
A signal sensor automatically compensates for the variations of the static pressure of the medium in which it is placed. The signal sensor comprises one or two assemblies each formed of a piezoelectric sensitive element applied against one face of a flexible plate. The other face of the plate is shielded from the variations of the dynamic pressure to be measured by a material absorbing the vibrations but fairly flexible so as to transmit any variation of the ambient static pressure. This material which may be a porous foam or a fibrous substance impregnated with liquid, fills a tubular apertured sleeve.

REFERENCES:
patent: 3372370 (1968-03-01), Cyr
patent: 3375489 (1968-03-01), Kompanek
patent: 3380019 (1968-04-01), Sims
patent: 3794866 (1974-02-01), McElroy et al.
patent: 3900543 (1975-08-01), Davis
patent: 4166229 (1979-08-01), DeReggi et al.
patent: 4439497 (1984-03-01), DiFoggio

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