剪切谐振
一种谐振：其前表面上的波节图形为剪切波节，这些波节沿变幅杆长度方向延伸，在后表面上形成基本相同的波节图形；并且变幅杆前、后表面之间不存在轴向波节。在这种情况下，沿任何一条与螺柱轴线平行的直线，其上各点的瞬时轴向运动方向都相同。但是，被剪切波节分隔开的相邻区段，其轴向运动方向相反。
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.