Noise canceling headphone reduces ambient noise to provide quieter listening environment, these headphones are ideal for other noisy environments such as in plane, trains, and automobile journeys. By turning on the noise-canceling feature, listeners can enjoy undisturbed audio in busy public places or while traveling on noisy public transport. Noise canceling technology works by electronically producing sound waves opposite to the ambient sound outside your headphones. The Noise canceling circuit actually senses outside noise with built-in microphones and sends an equal-but-opposite canceling signal to the headphones. Canceling noise allows you to hear your music at lower volumes.