Careful shielding will usually attenuate normal mode noise, and many instruments have internal filtering to reduce the effects of such noise even further.

仔细的屏蔽通常能够衰减串模噪声，很多仪器都有内部的滤波器以进一步降低这种噪声的影响。

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Mainly used three methods, including including the F-K domain filter, internal excision and the energy decay method to attenuate multiple and obtained a more ideal result.

主要采用了F - K域滤波法、内切除和近道能量衰减法压制多次波三种技术，取得了较好的效果。

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