Automatic recognition and suppression of high-frequency noises in time-frequency domain

On the basis of analyzing the norm of recognizing high-frequency noises presented by Mr. Zhag Yu and Mr. Qian Zhong-ping and using the idea on the recognition and suppression of high-frequency noises after frequency division of wavelet in equal frequency components within a narrow band presented by Mr. Xia Hong-rui et al., the paper presented that in time-frequency domain taking absolute values mean amplitude in several bands representing main energy in seismic traces as absolute values of mean amplitude of normal wavelet can recognize and suppress the abnormal amplitudes of high-frequency noises. The results of practical processing showed that the method not only suppresses high-frequency harmonics and high-frequency pulse noise, but also can protect the weak seismic reflection signals from damage.