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