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Radio is the wireless transmission of signals, by modulation of electromagnetic waves with frequencies below those of light.

Radio waves


Radio waves are a form of electromagnetic radiation, created whenever a charged object (in normal radio transmission, an electron) accelerates with a frequency that lies in the radio frequency (RF) portion of the electromagnetic spectrum. In radio, this acceleration is caused by an alternating current in an antenna. Radio frequencies occupy the range from a few tens of hertz to a few hundred gigahertz.
ELF - SLF - ULF/VF - VLF - LF/LW - MW - HF/SW - VHF - UHF - SHF - EHF
Electromagnetic radio spectrum
Other types of electromagnetic radiation, with frequencies above the RF range, are infrared, visible light, ultraviolet, X-rays and gamma rays. Since the energy of an individual photon of radio frequency is too low to remove an electron from an atom, radio waves are classified as non-ionizing radiation.
Electromagnetic spectrum and diagram of radio transmission of an audio signal.

Electromagnetic radiation travels (propagates) by means of oscillating electromagnetic fields that pass through the air and the vacuum of space equally well, and does not require a medium of transport (such as the aether). When radio waves pass an electrical conductor, the oscillating electric or magnetic field (depending on the shape of the conductor) induces an alternating current and voltage in the conductor. This can be transformed into audio or other signals that carry information. The word 'radio' is used to describe this phenomenon, and television, radio, radar, and cell phone transmissions are all classed as radio frequency emissions.

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jingles - Google News

CBS' Jingles Open Casting Call New York! - Realitywanted
Fri, 16 May 2008 02:18:13 -0000
CBS' Jingles Open Casting Call New York!Realitywanted, AZ - 7 hours agoHave you always watched or listened to commercials and jingles and thought, "I CAN DO BETTER THAN THAT!!!" CBS and Mark Burnett Productions have teamed up ...
Nat King Cole's Brother Freddy Cole To Perform In Turkey - Turkish Press
Fri, 16 May 2008 05:36:27 -0000
Nat King Cole's Brother Freddy Cole To Perform In TurkeyTurkish Press, MI - 3 hours ago... piano at age six and released his first single in 1952. He went on to work with Grover Washington, Jr. and has had jingles played on Turner Classic Movies.
Jingles to teach NSW youngsters road safety - NEWS.com.au
Wed, 30 Apr 2008 12:12:22 -0000
Jingles to teach NSW youngsters road safetyNEWS.com.au, Australia - Apr 30, 2008SONGS and nursery rhymes are part of a new program teaching road safety to children in NSW. Macquarie University and the NSW government have developed a CD ...
CBS could be looking for you - Out & About
Wed, 14 May 2008 14:23:05 -0000
CBS could be looking for youOut & About, TN - May 14, 2008They are looking for the greatest undiscovered marketing genius for a new show called Jingles. The production company is looking for teams of two to four ...
Menu jingles have not only produced winners for four primaries ... - Times Educational Supplement
Fri, 09 May 2008 03:30:22 -0000
Menu jingles have not only produced winners for four primaries ...Times Educational Supplement, UK - May 8, 2008This trio made their debut live on Peterhead-based Waves Radio, after a competition to find the top radio jingles, slogans and dramas to publicise ...
Review: Equus at Malvern Festival Theatre - Birmingham Post
Wed, 14 May 2008 11:20:26 -0000
Review: Equus at Malvern Festival TheatreBirmingham Post, UK - May 14, 2008Apart from Alan's taste in jingles nothing has obviously dated in the play (Shaffer has apparently updated some colloquial-isms) but the psychology seems ...

 
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