Welcome to Wikipedia's portal for Radio.
Radio is the wireless transmission of signals, by modulation of electromagnetic waves with frequencies below those of visible light.
Electromagnetic radiation travels via oscillating electromagnetic fields that pass through the air and the vacuum of space. It does not require a medium of transport. Information is carried by systematically changing (modulating) some property of the radiated waves, such as their amplitude or their frequency. When radio waves pass an electrical conductor, the oscillating fields induce an alternating current in the conductor.
The word 'radio' is used to describe this phenomenon, and television, radio, and cell phone transmissions are all classified as radio frequency emissions.
Modulation is the process where speech, music and the like are impressed onto the carrier wave of a transmission. Detection or demodulation is the reverse process which takes place in a receiver. The speech, music etc. is recovered and may then be amplified and applied to an ear piece or a loud speaker. The most common forms of modulation are Amplitude Modulation (AM) and Frequency Modulation (FM) both of which use different modulation and detection circuits. Cell phones, digital radio and digital television use more complex modulation and demodulation systems.
The simplest AM receiver is the Crystal Set or Crystal Radio. Demodulation is achieved by a semiconductor diode. One of the earliest forms of detection consisted of a thin copper wire in contact with a small chunk of Galena Rock. Adequate signals could be heard in headphones for up to 50 km with simple arrangements.
(OTR) and the Golden Age of Radio
refer to a period of radio programming
lasting from commercial radio's introduction in the early 1920s to its replacement in the late 1950s and early 1960s by television as the dominant home entertainment medium. During this period, when radio was dominant and the airwaves were filled with a variety of radio formats and genres, people regularly tuned in to their favorite radio programs. In fact, according to a 1947 C. E. Hooper
survey, 82 out of 100 Americans were found to be radio listeners. The end of this period coincided with music radio
becoming the dominant radio form and is often marked by the final CBS
broadcasts of Suspense
and Yours Truly, Johnny Dollar
on September 30, 1962.
Radio content in the Golden Age of Radio had its origins in audio theatre. Audio theatre began in the 1880s and 1890s with audio recordings of musical acts and other vaudeville. These were sent to people by means of telephone and, later, through phonograph cylinders and discs. Visual elements, such as effects and sight gags, were adapted to have sound equivalents. In additions, visual objects and scenery were converted to have audio descriptions.
This photo shows an early 1930s wooden radio receiver in the classic "cathedral" shape, which was designed and built by Philco. Philco, at the time of this radio's construction, was the leading manufacturer of radios. Photo Credit: User:Gmaxwell
||Radio is a medium of entertainment which permits millions of people to listen to the same joke at the same time, and yet remain lonesome.
Sir Michael Terence Wogan, KBE DL (born August 3 1938) more commonly known as Terry Wogan, is a veteran Irish radio and television broadcaster, who has worked for the British Broadcasting Corporation in the United Kingdom for most of his career. He has been a leading media personality in Ireland and the UK since the late 1960s, and is often referred to as a "national treasure" of both the United Kingdom and his native Ireland.
Terry Wogan, the son of a grocery store manager in Limerick, was educated at the Jesuit school of Crescent College from the age of eight. He experienced a strong religious upbringing, later commenting that "There were hundreds of churches, all these missions breathing fire and brimstone, telling you how easy it was to sin, how you'd be in hell. We were brainwashed into believing." Despite this, he has often expressed his fondness for the city of his birth, commenting on one occasion that "Limerick never left me, whatever it is, my identity is Limerick."
- Radio December 12, 2006 "...to create, expand, and maintain wikipedia articles related to radio, including radio propagation and reception, radio programming, radio personalities, and the business of radio." (Example: Mutual Broadcasting System)
- Amateur Radio August 24, 2006 "...to improve Wikipedia's articles related to Amateur radio, maintain the amateur radio category and its sub-categories for clean organization, and to produce and maintain templates for Amateur radio-related topic identification." (Example: Amateur radio)
- Radio Stations February 15, 2005 "...to coordinate the activities of creating and maintaining articles about radio stations." (Example: Pulse FM Kingborough & Huon)
- Podcasting January 21, 2007 "...to make Wikipedia's knowledge of notable Podcast and podcast-related information as complete as possible." (Example: Podcast)
||Music radio, Old-time radio, Radio comedy, Radio documentary, Radio drama, Top 40
||BBC Radio, Blue Network, Columbia Broadcasting System, Mutual Broadcasting System, National Broadcasting Company, Sirius Satellite Radio, XM Satellite Radio
||Fred Allen, Gracie Allen, Don Ameche, Jack Benny, Edgar Bergen, Jagadish Chandra Bose, George Burns, Ronald Colman, Jim Connors, Frank Conrad, Norman Corwin, Alice Faye, Stan Freberg, Phil Harris, Bob Hope, Spike Jones, Hans von Kaltenborn, Kay Kyser, Frances Langford, Guglielmo Marconi, Elizabeth McLeod, J. Carrol Naish, Ozzie Nelson, Arch Oboler, Dorothy Parker, Virginia Payne, Harold Peary, David Sarnoff, Red Skelton, Kate Smith, Howard Stern, Nikola Tesla, Lurene Tuttle, Rudy Vallée, Fred Waring, Orson Welles
||Abbott and Costello, Amos 'n' Andy, Arch Oboler's Plays, Burns and Allen, Cavalcade of America, CBS Radio Mystery Theater, Dragnet, Duffy's Tavern, Fibber McGee and Molly, The Goldbergs, The Howard Stern Show, Inner Sanctum Mysteries, The Jack Benny Program, Life with Luigi, Lights Out, Lux Radio Theater, Opie and Anthony, The Archers, The Hitchhiker's Guide to the Galaxy, The Phil Harris-Alice Faye Show, Quiz Kids, The Screen Guild Theater, The Shadow, Suspense, Theater Guild on the Air, Twenty Questions, The Whistler, Yours Truly, Johnny Dollar
||Amateur radio, AM broadcasting, FM broadcasting, International broadcasting, Internet Radio, Digital Radio Mondiale, HD Radio, Digital Audio Broadcasting and GNU Radio, Software-defined radio, Transistor radio, Vacuum tube