The headphones' noise-canceling circuit senses outside noise using tiny, built-in microphones and sends an equal-but-opposite canceling signal to the headphone drivers, effectively blocking solid-state (continuous) noise from 40 to 1,500 Hz. It's especially effective on noises like air-conditioning systems, freeway rumble, and airplane engines (from a passenger's perspective).

The switchable noise-canceling circuitry runs for approximately 30 hours on a single AAA alkaline battery. When noise canceling is off, the headphones continue to function for standard music listening (and with slightly better sound quality). The headphones' neodymium-magnet diaphragms deliver powerful sound.

The headphones and their swiveling earcups fold for easy storage, and a special supplied adapter facilitates use of the headphones with an airplane's audio system.

What's in the Box
Headphones, a carry pouch, an in-flight adapter, and a user's manual.

Product Description
Shut off the outside world with MDR-NC6 noise canceling headphones. Ambient sound can be reduced over 10dB at 300Hz, which means you'll hear more music, and less plane/train/bus noise. Noise canceling headphones are great for work, traveling, or even when you're trying to sleep in a loud place. The MDR-NC6 has a slim swivel folding design, making them more compact for storage. Includes plug adaptor to connect directly to a stereo or dual jack of in-flight music services.