Editing Analog signal (section)

==Representation==
An analog signal uses some property of the medium to convey the signal's information. For example, an [[aneroid barometer]] uses rotary position as the signal to convey pressure information.<ref>{{cite web |title=Analog vs. Digital Signals: Uses, Advantages and Disadvantages |url=https://www.monolithicpower.com/en/learning/resources/analog-vs-digital-signal |publisher=Monolithic Power Systems |date=2020-01-01 |access-date=2025-04-08}}</ref> In an electrical signal, the [[voltage]], [[Electric current|current]], or [[frequency]] of the signal may be varied to represent the information.

Any information may be conveyed by an analog signal; such a signal may be a measured response to changes in a physical variable, such as [[sound]], [[light]], [[temperature]], position, or [[pressure]]. The physical variable is converted to an analog signal by a [[transducer]]. For example, sound striking the diaphragm of a [[microphone]] induces corresponding fluctuations in the current produced by a coil in an electromagnetic microphone or the voltage produced by a [[condenser microphone]]. The voltage or the current is said to be an ''analog'' of the sound.{{fact|date=December 2024}}<ref>{{Cite book |last=Horowitz and Hill |first=Paul and Winfield |title=The Art of Electronics |publisher=Cambridge University Press |date=24 April 2025 |isbn=978-0521809269 |edition=3rd |location=Cambridge, United Kingdom |publication-date=2015 |pages=1225 |language=en}}</ref>