DESC: openboxstorereturns store Sony Mdr-nc22 Blk Noise Canceling Headphone (Black) No matter where you go, enjoy peace and quiet with the MDR-NC22 Noise Canceling headphones. These compact and comfortable bud-style headphones can reduce noise by 75 (12dB at 200 Hz) and the 13.5mm driver units produce powerful sound. Perfect for tuning out noise at work, traveling, or even when you are trying to sleep in a loud environment.