[[File:Radio transmission waves(AM and FM).gif|thumbnail|The Audio Signal (top) is transmitted on a carrier wave by modifying the [[amplitude]] (middle) or [[frequency]] (bottom)]]'''Frequency modulation''' ([[FM]]) is a signaling method that varies the carrier [[frequency]] in proportion to the [[amplitude]] of the modulating signal.
Frequency modulation is most commonly used in [[radio]], [[amateur radio]], [[radar]], telemetry, [[seismic]] prospecting, and in the monitoring of [[baby|newborn]]s for [[seizure]]s via [[EEG]].<ref>B. Boashash, editor, “Time-Frequency Signal Analysis and Processing – A Comprehensive Reference”, Elsevier Science, Oxford, 2003; ISBN 0-08-044335-4</ref>
==See Alsoalso==
* [[Radio communication technologies]]
* '''[[Radio]]:''' [[Radio waves]], [[Electromagnetic wave]], [[Radio frequency]], [[AM/FMFrequency]], [[modulation]], [[amplitude]], [[amplitude modulation]] ([[AM]]), [[frequency modulation]] ([[FM]]), or [[single-sideband modulation]] ([[SSB]]), [[Shortwave]], [[Two-way radio]], [[Portable radio]], [[Walkie-talkie]], [[Citizens band radio]], [[Family Radio Service]] ([[FMS]]), [[General Mobile Radio Service]] ([[GMRS]]), and [[Multi-Use Radio Service]] ([[MRS]]), [[Motorola]], [[Marine VHF radio]], [[History of radio]]
* '''[[Amateur Radio]]:''' [[Emergency communications]], [[Amateur radio operator]], [[Call sign]], [[Selecting a radio]], [[Amateur radio glossary]], [[Amateur radio repeater]], [[Base station]], [[Amateur radio frequency allocations]], [[Amateur radio high bands]], [[Amateur radio station]], [[UHF]] ([[70-centimeter band]]), [[VHF]] ([[2-meter band]]), [[HF]], [[Morse code]], and [[Telegraph]], [[Mobile rig]], [[QSL card]]
* '''[[Antenna (radio)]]:''' [[Antenna theory]], [[Portable operation (amateur radio)]], [[Dipole antenna]], [[Homebrew antennas]], [[Coaxial cable]], [[Balun]], [[Packet radio]], and [[Propagation]], [[Protecting your HT Antenna]] * '''Radio Standards Organization:''' [[Radio legalities]], [[FCC]], [[American Radio Relay League]], [[International Telecommunication Union]] ([[ITU]])
* [[Satellite]]: [[GPS]]
* '''[[Cellular telephone]]:''' [[Mobile device]]s: [[Smartphone]]s and [[tablet computer|tablets]]** [[Apple Computer|Apple]] [[iOS]] for [[iPhone]]-[[iPod]]-or [[iPad]]
** [[Android (operating system)|Android]]
** [[BlackBerry OS|Blackberry]]
** [[Microsoft]] [[Windows Phone]] Phone with [[Windows 8]]
** [[Cell phone health scare]], [[Mobile phones and brain tumor risk]]
* [[Bug-out bag]]
* [[Bug-out bag]] ([[BOB]]) and [[Everday carry]] ([[EDC]]) ==Further Readingreading==
* A. Bruce Carlson. ''Communication Systems, 4th edition.'' McGraw-Hill Science/Engineering/Math. 2001. ISBN 0-07-011127-8, ISBN 978-0-07-011127-1.
* Gary L. Frost. ''Early FM Radio: Incremental Technology in Twentieth-Century America.'' Baltimore: Johns Hopkins University Press, 2010. ISBN 0-8018-9440-9, ISBN 978-0-8018-9440-4.
==External Linkslinks==
* [http://thesurvivalpodcast.com/forum/index.php?topic=28989.0 A Walkie Talkie For your BOB]
* [http://thesurvivalpodcast.com/forum/index.php?topic=32100.0 Two Way Radio Range Estimates]
[[Category:Telecommunications]]
[[Category:Communication]][[Category:Amateur RadioElectrical Engineering]]
[[Category:Radio]]