The Fourier spectrum of the wave moment shows that high frequency components will appear and they may cause ringing.
分析结果表明，极端波浪作用下的波浪力矩包含高频成分，是结构物可能产生高频共振响应的原因。
2
An image restored by a recursive solution of traveling wave equation is natural to visual interpretation, without ringing effect and distortion emerging, but accumulated noise appears on it obviously.
The wave form and the spectrum of impact force as well as the variation in sound exposure level (SEL) at a fixed point were measured which representing the relative changes of the ringing noise.