Abstract: A nonlinear dynamic noise reduction method is described in this paper,which achieves the separation between the useful signal and the noise by the construction of nonlinear inverse to linear filter in virtue of successive approximation using Radial Basis Function,based on the spectrum difference between the aforementioned signals.Two examples with sine pulse as the useful signal are show in the paper. One is the artificial chaotic signal, and another is the reverberation. These examples confirm the feasibility about this method with reverberation as the background(the improvement on SRR reaches 16dB before and after the usage of this method).The analysis of the condition of spectrum difference has been done to ensure this method's validity(≥0.15 cycle frequency).In this paper a new approach about anti reverberation is provided.