Panasonic Noise Cancelling Headphones enhance your listening experience by allowing you to enjoy music in peace. They also allow you to enjoy some peace and quiet in noisy environments. They create a sound barrier to block out noise coming from cars, airplane engines, air conditioners or surrounding people. They generate an out-of-phase signal that works primarily to eliminate irritating background ambient noise. It�s amazing that all you need to produce the out-of-phase signal is a single AAA battery. Users also have the option to switch off the noise-cancelling feature anytime they choose. It is also very easy to bring around these headphones since they feature a foldable design and a detachable cord. These headphones offer you a peaceful listening experience at home, at work or while traveling.