Origin of microphonemicro- + -phone
A girl about to speak into a microphone.
An example of microphone is something a singer sings into so people in the back row can hear him.
- The collective noun for several microphones (such as can be observed at a press conference) is a garden of microphones.
(third-person singular simple present microphones, present participle microphoning, simple past and past participle microphoned)
- To put one or more microphones on or in.
microphone - Computer Definition
A device that converts sound waves into analogous electrical waves. Usually called a "mic" or "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 mic, 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 mic, also called an "electrostatic mic" or "capacitor mic," the diaphragm changes the capacitance between itself and a metal plate, both acting as electrodes. The widely used electret mic 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 mics, 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. Directionality Unidirectional shotgun and cardioid mics aimed at a sound source eliminate much of the ambient noise, whereas omnidirectional microphones capture everything in the surrounding environment. The cardioid name comes from its heart-shaped pickup pattern. In the past, bidirectional mics were used for interviews; however, two unidirectional mics are commonly used instead.