The man who hears colour

Artist Neil Harbisson is completely colour-blind. Until 11, he didn't know he was suffering from achromatopsia (a rare vision disorder) and could only see in shades of grey.

When he was 16, he decided to study art. He was allowed to do the entire art course in greyscale - only using black and white.

In the university, he paired up with a cybernetics expert who helped him come up with the antenna-like device. It’s a simple device, made up of a webcam, a computer and a pair of headphones and created software that would translate any colour in front of him into a sound.

(Source)