Noise Cancellation Headphones

["Enhance your audio entertainment by reducing ambient noise for a quieter environment", "Anti-sound signal reduces ambient noise by 15 dB at 200 Hz", "Powerful sound quality delivered through 36mm high quality drivers with Neodymium Magnets", "Thickly padded head and ear cushions with fully foldable design offer travel convenience", "Operates as passive headphone when noise reduction circuit is inactive", "Stereo hi-fi and airplane adapters supplied"]