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目前叠后随机噪声压制方法众多，但去噪效果往往过于依赖剖面信噪比本身，从而在提高剖面高频段信噪比方面发生困难，难以真正展宽输出剖面高频段有效频带。方向约束叠后噪声压制方法在高频段有效信号的估计中，用易于求取的信噪比相对较高的低频段有效信号方向来约束。这样做的结果，使高频段有效信号的估计更加准确，能更好地改善去噪效果，从而达到拓宽有效频带的目的。
At present, there are many post-stack stochastic noise suppression methods, but the de-noising effect tends to be too dependent on the profile SNR itself, which makes it difficult to improve the signal-to-noise ratio in the high frequency section of the profile and makes it difficult to truly broaden the effective band of the high frequency band in the output profile. Post-stack Post-stack Noise Suppression Constraints In the estimation of the effective signal in the high frequency range, the effective signal direction of the low frequency band with a relatively high signal-to-noise ratio is easily constrained. As a result of this, the effective signal estimation in the high frequency band is more accurate, and the denoising effect can be improved so as to broaden the effective frequency band.