不对称谐振
一种非轴向模态，其中同一谐振器上对称位置处的振幅相位相差 180°（即相位恰好相反）。由于振幅相位相差 180°，两个位置之间必定至少存在一个波节。因此，不对称谐振不可能是轴向谐振。
例如：一个条形变幅杆存在这样一种谐振——变幅杆端面一端的瞬时振幅为 +100 微米，而同一瞬时端面另一端的振幅为 -90 微米。注意，端面两端的振幅相位（符号）相反，这表明是不对称模态，尽管振幅的大小并不一定相等（100 微米对 90 微米）。
Asymmetric resonance
A nonaxial mode in which the amplitude is 180° out of phase (i.e., exactly opposite in phase) at symmetric locations on the same resonator. Since the amplitudes are 180° out of phase, there must be at least one node between the two locations. Thus, an asymmetric resonance cannot be an axial resonance.
Example: a bar horn has a resonance where the instantaneous amplitude at one end of the horn face is +100 microns, while at the same instant the amplitude at the other end of the horn face is -90 microns. Note that the amplitudes at either end of the horn face are opposite in phase (sign), which indicates an asymmetric mode, even though the magnitude of the amplitudes is not necessarily equal (100 microns versus 90 microns).
Also see —
Asymmetric amplitude
Symmetric resonance