Segmentation and polarization in a hydrophone crystal

Details Segmentation and polarization in a hydrophone crystal Segmentation and polarization in a hydrophone crystal

1995-10-19

1997-09-02

Pihulic, Daniel T.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

H04R 1700

Patent

active

056639317

ABSTRACT:
A hydrophone transducer is prepared by depositing a piezoelectric material upon a conductive substrate or support structure, and then etching the material into selected regions or segments. The center segment, which provides most of the fundamental signal, is polarized in a first direction by the introduction of a polarizing voltage. The end segments are polarized in the opposite direction by the imposition of a polarizing voltage in the opposite direction. The conductive substrate then serves as one terminal of the output of the hydrophone while the upper surfaces of the segments together serve as the other terminal. The relative strengths of the signals from the segments may tailored by adjusting the areas of the segments.

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