The high frequency components of seismic reflection waves directly affect the
resolution and clarity of seismic images.However,the proposal of the cutoff frequency of 60 dB makes the acquisition of
high frequency components questionable.The core reason for the existence of cutoff high frequency lies in the frequency
division and occupation.The white noise coefficient hinders the increase of the high frequency amplitude,whereas the
frequency leakage hinders the reduction of the amplitude difference between the low and high frequencies.These are two
additional reasons for the cutoff high frequency.Consequently,the cutoff high frequency of 60 dB becomes the recordable
limit of the frequency component of the seismic data.In fact,no physical component exists and no data decomposition takes
place in digital seismographs.Moreover,it is physically impossible for multiple values to occupy different digits of the
same mantissa at the same time,thus the core basis of the cutoff high frequency loses support.The cutoff high frequency in
the Xinjiang desert region is quite different from the frequency distribution of the actual seismic data.This study
therefore demonstrated that the cutoff high frequency of 60 dB is a corollary inconsistent with the reality.
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