Piezoelectric transducer
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United States of America Patent
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Aug 25, 1992
Issued Date -
N/A
app pub date -
Jun 3, 1991
filing date -
Mar 27, 1989
priority date (Note) -
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Abstract
A piezoelectric transducer having electrodes formed on both surfaces has a piezoelectric base molded as a curved plate which can converge sound fields of acoustic waves at an arbitrary point and which can reduce noise or reverberation in a lateral direction which otherwise occur due to unnecessary vibration. At least one of the electrodes is divided concentrically. A material having a small electromechanical coupling factor K.sub.p in the lateral direction is used for the piezoelectric material, preferably porous PZT.
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