Fiber Optic Microphone
Fiber-optic systems, which use super-thin strands of glass to transmit information instead of traditional metal wires, have been revolutionizing the field of telecommunications in recent years, including microphone technology. So what's the big deal? Unlike conventional mics, which are often big and send an electrical signal, fiber optic microphones can be extremely small, and they can be used in electrically sensitive environments. They can also be produced with no metal, which makes them very useful in magnetic resonance imaging (MRI) applications and other situations where radio frequency interference is an issue [source: Fibersound Audio].