Where the vertical stacking is applied in seismic investigations with an impulsive or a vibratory energy source, there is an opportunity to cancel non-stationary noise created by moving vehicles, forest cutting, ice cracking, etc. The known and effective tools for suppression of such types of noise are diversity stacking (a classical approach) and median fdtering (a simplified approach). This paper contains the results of experimental studies of low-amplitude and high-amplitude noise suppression with the aid of these two approaches. It has been shown that high-amplitude ice-crack noise (frost breaks) can be effectively filtered out at the stage of seismic data acquisition. The preservation of relative amplitudes in stacked records has been analyzed.......