Noise cancelling headphones use the advanced technology of active noise reduction to cancel the sound that comes around the person who uses them, whatever it is: city traffic noise, crowded office, local noise. The headphones can reduce the background sounds up to 92%, allowing you to focus only on the music you are listening to, the conversation you are having or the movie you are watching. Noise cancelling headphones are an interesting solution because they prevent a common attitude in many people who, to counteract the background noise, tend to raise the volume of the devices. Obviously, these headphones, however effective, tend to reduce ambient noise, not to erase it completely: they do not allow to get away from the surrounding environment, you have to imagine like a background buzz.