Acoustic transducer

G - Physics – 01 – H

Patent

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349/65

G01H 11/08 (2006.01) G01V 1/20 (2006.01)

Patent

CA 1284210

ABSTRACT A pressure sensing transducer comprises a central region which comprises a potting material and which is surrounded by a helix of piezo electric coaxial cable. The transducer includes a barrier that suppresses transmission of external pressure variations to the central region. In addition, the overall radial stiff- ness of the potting material and barrier is suf- ficiently low that the electrical signal generated by the coaxial cable have a d31 polarity (corresponding to axial stretching and contracting of the cable).

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