A Japanese company has invented the world's first wristwatch phone which works by transforming the user's finger into an earpiece, it was reported. The prototype gadget, Finger Whisper, consists of a wristband that converts digital signals into vibrations that are transmitted into the bones of the hand New Scientist says in next Saturday's issue. The user puts his finger into his ear for the vibrations to be picked up by the eardrum, which then transcribes them back into sound signals for the brain. To talk, he or she simply speaks into a microphone on the wristband. By touching forefinger to...