Abstract：There is a strong single-frequency interference wave around 50 Hz in seismic records when a high-tension line crossed over a seismic line in the process of field seismic data acquisition.The interference wave has strong energy over whole time period of seismic records,and its frequency,phase and amplitude can be basically considered to maintain invariable.Adopting suppression method in frequency domain noise and signal have been only suppressed at certain amount simultaneously and the interference hse hardly beenrevoved,that is to say,signal-to-noise ratio has not been yet improved in the vicinity of single-frequency component.So,we approached the interference wave using cosine wave in time domain and subtract it from seismic records for the purpose of suppressing the interference wave.The most major advantage of the method is that only interference wave with single frequency has been suppressed and useful signal has not been harmed,so the signal-to-noise ratio has been improved in vicinity of single-frequency component.It shows through theoretical and real data test that the method is feasible and effective.
