Sena Phantom ANC Full Face Blueooth Helmet Gloss BlackFeaturing Active Noise Control to offer an unparalleled audio and safety experience Active Noise Control works by listening to the ambient noise around the rider, such as those generated by the wind and engine, then sending the opposite sound frequency through the speakers Reduces the destructive ambient noise by as much as 20 dB When that hearing protection is combined with the Phantom ANC's fiberglass composite shell and premium EPS padding, the