PHANTOM ANC Full-face Motorcycle Helmet with Integrated Communication System Featuring Active Noise CancellationThe Sena PHANTOM ANC is the first purpose built smart communications helmet featuring Active Noise Control to offer an unparalleled audio and safety experience. Active Noise Cancellation 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. This reduces the destructive ambient noise by as much as 20 dB. When that hearing protection is