Ultrasonic transducer with reduced acoustic cross coupling.

摘要

A continuous wave driven ultrasonic transducer for determining Doppler frequency shift in reflected ultrasonic pressure waves in which the transmitter (40) and receiver (42) sections are constructed of a composite core (30) having a plurality of segments of piezoelectric material (32) separated by acoustic suppression material (34). Also disclosed is a method of reducing acoustic and mechanical cross-coupling between piezoelectric transmitter (40) and receiver (42) sections of an ultrasonic transducer by arranging segments of piezoelectric material (32) in a lateral array, and separating the piezoelectric segments with ultrasonic acoustic suppression material (34) to produce a composite transducer core (30) of reduced acoustic and mechanical cross-coupling.