The impulse motion and the unbalanced vibration of the pump generate certain structural noise which could be significantly expressed in frequency spectrum.
泵的脉动运动与不平衡振动产生了结构噪声，结构噪声在频谱中清晰显示出来。
It is difficult to detect the periodic impulse component in the vibration acceleration signal with conventional analysis methods such as time domain wave and frequency spectrum.
通过时域波形和频谱等基本分析手段来探测振动加速度信号中的周期性冲击分量往往是困难的。
Theoretically, the expected output of impulse deconvolution is a spike, whose frequency spectrum can be considered as that of white noise.
从理论上说，脉冲反褶积的希望输出信号是一个尖脉冲，其频谱可以看成是一个白噪信号的频谱。
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