Laptop Gamers has posted a new article on the Bose QuietComfort 2 Noise Canceling Headphone

Bose noise-reducing headphones may look like ordinary headphones on the outside, but that's where the similarity ends. The technologies inside is what sets it apart of other headphones. This technology is also used by the U.S. military and private pilots. A microphone in each earcup "hears" sounds an instant before they can reach the ears. Advanced electronics recognize what the listener wants to hear-a message from the control tower, music, an in-flight movie or silence-and compares it to noise the listener doesn't want to experience. Bose patented electronics then calculate and generate a signal opposite to the unwanted noise, dramatically reducing it while preserving the desired music, speech or silence.

Bose QuietComfort 2 Noise Canceling Headphone Review