Shear resonance

A resonance for which the nodal patterns on the face are shear nodes that extend through the length of the horn to form essentially identical nodal patterns on the back surface and for which there is no axial node between the front and back of the horn. Under this condition, every point along any given line parallel to the stud axis will have the same instantaneous direction of axial motion. However, adjacent sections that are separated by shear nodes will have opposite axial motion.