Neil Harbisson was born legally color blind. He has an antenna surgically implanted into his skull which allows him to hear color through bone conduction. The antenna extends from his body, from the back of his skull and hovers above his forehead. The light frequency is transposed into a sound frequency which makes his skull vibrate. Both the visual and audio cortexes of the brain activate when there is either an image or sound.

Even if someone presents a black and white image of an orange, Neil receives a signal, in the tone of F# (F Sharp) and when he hears music, he receives different signals that allow him to see different colors .

In this link from CNN, there is a video where Neil is working on reproducing a melody using colors, so when he moves his head left to right he will receive microtones that will produce a melody in his mind. Cybernetics is allowing him to perceive reality in a much different way and experience the natural world in depth, in a way that is considered unnatural and inhuman, but to Neil Harbisson is the way of life.