(under subclass 326) Subject matter in which an absorber or attenuator is in intimate contact with a first part of the surface of the piezoelectric element to remove mechanical energy therefrom while mechanical energy is allowed to emanate from or into another part of the surface not in the same plane with the first part.
SEE OR SEARCH THIS CLASS, SUBCLASS:
335, for piezoelectric devices which eliminate back waves by reflecting them to recombine them either constructively with the front wave, or destructively with the back wave.
SEE OR SEARCH CLASS
73, Measuring and Testing,
67+, for nondestructive testing apparatus which may use a piezoelectric element with an attenuating element on a surface.
