Integrating hydrophone sensing elements

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

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Details

310800, 367162, 367165, H04B 1300

Patent

active

042362350

ABSTRACT:
An integrating hydrophone sensing element is provided having improved sensitivity and capability of withstanding high pressures. The sensing element consists of a rigid cylinder with semicylindrical sensing surfaces rigidly connected to the cylinder at diametrically-opposite points. A membrane of piezoelectric polymer material extends diametrically across the cylinder and is attached to the cylinder at points displaced 90.degree. from the connections of the sensing surfaces. Vibration of the cylinder by acoustic signals transmitted from the sensing surfaces causes vibration of the membrane and produces an electrical output signal.

REFERENCES:
patent: 3277433 (1966-10-01), Toulis
patent: 3308423 (1967-03-01), Massa, Jr.
patent: 3792204 (1974-02-01), Murayama et al.
patent: 3832580 (1974-08-01), Yamamuro

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