Acoustic sensor and array thereof

Details Acoustic sensor and array thereof Acoustic sensor and array thereof

1998-11-09

2000-08-22

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

H04R 1700

Patent

active

061082740

ABSTRACT:
An acoustic sensor having one or more segments are electrically coupled to provide a response corresponding to an acoustic pressure applied to the segments. Each segment contains at least one substrate of a desired shape and at least two active members made from a flexible, resilient piezoelectric material, preferably, a polyvinylidene fluoride material. Each substrate includes an enclosed chamber on an outer surface wherein a first active element is within the chamber and a second active element is sealingly placed on the enclosed chamber. The second active element is preferably bonded to a compliant diaphragm sealed to the substrate to provide the sealed chamber. An output response from the first active member is combined with an output response from the second active member to provide for a combined output response having reduced noise. The second active element is covered with a protective layer of a suitable material, preferably a polymer material.

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