"Mind-reading" machines beginning to appear

A neckband that picks up nerve signals and translates them into speech has been demonstrated for the first time.

With training, a user can send nerve signals to their vocal cords without making a sound that the neckband picks up and relays wirelessly to a computer, which then converts them into words spoken by a voice synthesizer.

This same device has been used to let people control wheelchairs using their thoughts.