Abstract: The rolling element bearing condition testing method uses acceleration signals at frequencies over 1000 Hertz and employs band-pass and digital filtering and envelope detecting techniques. The testing method measures the vibration signals generated by the rolling element bearing in the frequency range containing the majority of the rolling bearing energy, typically from 2,000 Hertz to 15,000 Hertz, next optionally de-modulates those signals, and then uses digital filter techniques to remove the interference, either from the de-modulated acceleration signal or from the raw acceleration signal.