Reduce background noise at work, home or when traveling with incredible Active Noise Cancelling technology. Ambient noise is detected by an on-board microphone and a signal is generated to greatly reduce external noise like aeroplane engines, office hubbub or loud crowds. You will hear and feel the difference! Powerful 40mm drivers deliver dynamic bass tones and clean high notes from the comfortable, padded ear cups. The Silenco Active Noise Cancelling headphones ensure maximum listening pleasure, wherever you are.