DESC: Take the noise out of noisy planes and accommodations with the Kensington Noise Canceling Headphones. A built-in microprocessor analyzes background noises and creates an inverse sound wave that cancels the offending sound. Engines, fans, snoring, and other low frequency annoyances virtually disappear leaving the traveler free to work, sleep, or listen to music in blissful silence. These comfortable and compact headphones allow mobile professionals to travel in peace and quiet.