CES 2008: Sony’s world's first digital noise cancelling headphones using artificial intelligence

Sony has unveiled a new set of noise cancelling headphones that claim to be the world’s very first set to use digital technology. The headphones convert the analogue audio signal into a digital signal, apply some digital equalising to enhance mid-range vocals and bass, then let you listen to it. Or something like that. Observe the diagram for an even less clear explanation.