Molar Mic lets soldiers and spies listen in

A tiny device that “snap fits” to your back teeth could revolutionise hands-free communication by enabling wearers to speak and hear radioed messages without any visible headset or microphone. The Molar Mic clips to the wearer’s upper molars and incorporates a waterproof microphone and a bone-conduction speaker to transmit incoming sound through the teeth and skull to the inner ear.
