Silence the world around you with the MDR-NC60 noise canceling headphone. It provide 16.5dB noise reduction at 200Hz. This means you can shut out up to 85% of the ambient noise around you, including jet engines, office printers and subway chatter. This headphone is perfect for work, traveling or just when you're trying to sleep in a loud place. The ear-conscious design offers premium comfort, so you can wear them for long stretches without pinching your ears. For added convenience, the built-in monitor switch lets you hear surrounding sound without taking off the headphone.