H - Electricity – 04 – R
Patent
H - Electricity
04
R
349/67.8
H04R 21/00 (2006.01) B06B 1/06 (2006.01)
Patent
CA 1136260
Title: A Phase Insensitive Ultrasonic Transducer ABSTRACT A phase insensitive ultrasonic transducer which includes a CdS crystal that is annealed for a selected period of time and at a select- ed temperature to provide substantially maximum acoustic attenuation at the operating frequency of the transducer. Two electrodes are attached to the crystal with amplifier means and a signal processing system con- nected to one of the electrodes to provide an ultrasonic receiver.
332405
National Aeronautics And Space Administration
Swabey Ogilvy Renault
LandOfFree
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