Rotation of Characteristic Vectors with Piezoelectric Coupling.
DEPARTMENT OF THE ARMY WASHINGTON DC
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Acoustic ultrasonic waves are launched in a block of single-crystal material, such as alpha-quartz, by means of a transducer fastened to one end of the block. The waves are steered by electrically altering the properties of the crystal between the piezoelectrically unstiffened and stiffened excitation modes. Author