10 Types of Microphones

Laser Microphone

A laser microphone works by capturing vibrations off of a plane, like a windowpane, for example, and transmitting the signal back to a photo detector, which converts the reflected laser beam into an audio signal. When sound hits the windowpane, it bends and causes the laser beam to bend, which can be translated to sound using a photocell. In recent years, scientists have been developing a new type of laser microphone that works by streaming smoke across a laser beam that's aimed at photocell, which is then converted to an audio signal [source: Van Buskirk].