As the mysteries of hearing begin to unfold, technology and scientific research are cooperating to restore, replace or augment this extremely powerful human sense. Hearing endows some individuals with super powers... Like this young man whose hearing is almost absolute, capable of turning every sound into music. Or this blind man who has developed a real radar with echolocation, so that he can ride a bicycle... As technology begins to merge with humans, some people are no longer very far from being true cyborgs: equipped with cochlear implants, they are demonstrating that the brain can learn to interpret a new synthetic sense. Already, hearing aids are exceeding the natural acoustic capabilities of the ear and are even beginning to decipher the brain's intentions.