‘World’s first’ digital noise cancellation HeadPhones

Sony claims to have released the world’s first pair of digital noise-canceling headphones. The innovative MDR-NC500D headphones use digital technology to more accurately reduce stress-inducing noise from planes, trains and buses. The Headphones are capable of 99% reduction of noise at 160 Hz. It has an internal Lithium-ion battery which can last for up to 16 hours. They are available online now for $400.