Ultra-compact Nano antennas made of Nano Materials have applications from wearables to airplanes, spacecraft and military

An antenna is a device used to propagate, receive, and/or transmit electromagnetic waves which can have information embedded within them. The antenna creates an electromagnetic wave that carries the original embedded sound information through the atmosphere/space around it. An antenna at a different location, receives the electromagnetic wave, sending it to circuitry (your radio) that then translates it to an electronic signal and then back to a sound wave.