Sony has developed the world?s first noise-canceling headphones with noise digital signal processing, Sony MDR-NC500D headphone. With a newly developed high speed software engine DNC, the headphone can cut off about 99% of external noise, such as daily sounds from air craft, trains and other vehicles. Sony MDR-NC500D is powered by a built ?in lithium battery. Battery case using 2 x AA batteries is also available. The built in lithium battery lasts up to 16 hours while alkaline batteries up to 10hours. A Sony MDR-NC500D headphone weighs approximately 195g with battery and comes with aircraft and AC adaptor plug.


The Sony MDR-NC500D headphone will be available in Japan from April 21 for approximately 49,350 yen ($492).

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