Active Noise Cancellation 2
Active Noise Cancellation 2 technology actively suppresses incoming noise, using similar operation to noise cancelling headphones. A signal identical to the incoming electrical noise is generated with an inverted phase, in order to perform this noise cancellation.
This method is particularly effective in eliminating noise at low and mid frequencies, while passive filtering takes care of interference at high frequencies. This clever combination is therefore more effective than simple passive filtering.
Thus, the measured noise is 100x or 40dB lower than what a conventional filter can offer.