Editing Signal (section)

==Signal processing==
[[File:Signal processing system.png|thumb|400px|Signal transmission using electronic signals]]
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Signal processing is the manipulation of signals. A common example is signal transmission between different locations. The embodiment of a signal in electrical form is made by a [[transducer]] that converts the signal from its original form to a [[waveform]] expressed as a [[Electric current|current]] or a [[voltage]], or [[electromagnetic radiation]], for example, an [[Free-space optical communication|optical signal]] or [[radio transmission]]. Once expressed as an electronic signal, the signal is available for further processing by electrical devices such as [[electronic amplifier]]s and [[electronic filters|filters]], and can be transmitted to a remote location by a [[transmitter]] and received using [[radio receiver]]s.