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same technology as a speaker
A '''microphone''' (or ''mike'') is an [[electric]] auditory pickup device. It has a [[sensor]] that detects the vibrations ([[sound]]) in the [[air]] and converts them into an analog or digital signal. Microphones are used in numerous devices such as [[telephone]]s, [[cellular phone]], [[amateur radio]], and two-way radios.
A '''microphone''' (or ''mike'') is an [[electric]] auditory pickup device. It has a [[sensor]] that detects the vibrations ([[sound]]) in the [[air]] and converts them into an analog or digital signal. Microphones are used in numerous devices such as [[telephone]]s, [[cellular phone]], [[amateur radio]], and two-way radios. A microphone is very similar to an [[audio speaker]]. Although microphones and speakers are designed for their specific purposes, the technology used is the same either way. By simply reversing the direction of power (cross-connect positive to negative and negative to positive) one device can technically be used for the opposite purpose.
==See also==
==See also==