Denon has introduced its AH-NC800 dual noise-cancelling travel headphones. Incorporating dual noise cancelling technology, the noise from outside the headphones is cut by up to 99 percent. This is the result of two microphones; one that cancel the noise from the outside, and a secondary mic that further suppresses external sound that might leak inside the headphones. Designed for digital portable music players, the headphones incorporate Denonís Compressed Audio Restorer active circuitry that reconstructs MP3 and MP4 recordings so they sound more natural and akin to
