A phase insensitive ultrasonic transducer which includes a CdS crystal that is annealed for a selected period of {TAIL ~ time} and at a selected temperature to provide {HEAD ~ substantially maximum acoustic attenuation} at the operating frequency of the transducer 
A phase insensitive ultrasonic transducer which includes a CdS crystal that is annealed for a selected period of { TAIL ~ time } and at a selected temperature to provide { HEAD ~ substantially maximum acoustic attenuation } at the operating frequency of the transducer
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH