- The definition of a microphone is something you talk into that magnifies your voice or makes it louder.
An example of microphone is something a singer sings into so people in the back row can hear him.
A girl about to speak into a microphone.
microphone definition by Webster's New World
Origin: micro- plush -phone
- microphonic adjective
microphone definition by American Heritage Dictionary
- miˌcro·phonˈic adjective
microphone - Computer Definition
A device that converts sound waves into analogous electrical waves. Usually called a "mike," it contains a flexible diaphragm composed of film or foil that vibrates as it makes contact with the sound. The diaphragm movement modulates an electrical current by various methods. In a carbon mike, used in telephones for more than a hundred years, the diaphragm alters the pressure in carbon grains, changing its resistance. Condenser Microphones In a condenser mike, also called an "electrostatic mike" or "capacitor mike," the diaphragm changes the capacitance between itself and a metal plate, both acting as electrodes. The widely used electret mike has a charged dielectric between the electrodes that generates voltage. Crystal and Dynamic Microphones Crystal microphones use a piezoelectric diaphragm that produces voltage when subjected to the sound waves (mechanical pressure). Dynamic mikes, which are like speakers in reverse, use a diaphragm attached to a movable coil that generates voltage as air moves the coil between the poles of a magnet.