On this phone call, no one can hear you talk

The Karlsruhe Institute of Technology in Germany has developed a way for people to communicate by speaking into a phone silently by simply moving their lips. This borderline telepathy-meets-technology is no simple feat, requiring electromyographic sensors to be attached to the face to measure the movement of facial muscles related to speech. Those movements are then converted to sound on the other end of the line. Though it's not yet at a stage where the masses can use, the potential ramifications of the development are incredible.