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AM Radio
AM broadcasting is radio broadcasting using amplitude modulation (AM) transmissions. It was the first method developed for making audio radio transmissions, and is still used worldwide, primarily for medium wave (also known as "AM band") transmissions, but also on the longwave and shortwave radio bands. The earliest experimental AM transmissions began in the early 1900s. However, widespread AM broadcasting was not established until the 1920s, following the development of vacuum tube receivers and transmitters. AM radio remained the dominant method of broadcasting for the next 30 years, a period called the "Golden Age of Radio", until television broadcasting became widespread in the 1950s and received much of the programming previously carried by radio. Later, AM radio's audiences declined greatly due to competition from FM (FM broadcasting, frequency modulation) radio, Digital audio broadcasting, Digital Audio Broadcasting (DAB), satellite radio, HD Radio, HD (digital) radio, In ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Amplitude Modulation
Amplitude modulation (AM) is a signal modulation technique used in electronic communication, most commonly for transmitting messages with a radio wave. In amplitude modulation, the instantaneous amplitude of the wave is varied in proportion to that of the message signal, such as an audio signal. This technique contrasts with angle modulation, in which either the frequency of the carrier wave is varied, as in frequency modulation, or its Phase (waves), phase, as in phase modulation. AM was the earliest modulation method used for transmitting audio in radio broadcasting. It was developed during the first quarter of the 20th century beginning with Roberto Landell de Moura and Reginald Fessenden's radiotelephone experiments in 1900. This original form of AM is sometimes called double-sideband amplitude modulation (DSBAM), because the standard method produces sidebands on either side of the carrier frequency. Single-sideband modulation uses bandpass filters to eliminate one of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
FM Broadcasting
FM broadcasting is a method of radio broadcasting that uses frequency modulation (FM) of the radio broadcast carrier wave. Invented in 1933 by American engineer Edwin Armstrong, wide-band FM is used worldwide to transmit high fidelity, high-fidelity sound over broadcast radio. FM broadcasting offers higher fidelity—more accurate reproduction of the original program sound—than other broadcasting techniques, such as AM broadcasting. It is also less susceptible to Electromagnetic interference, common forms of interference, having less static and popping sounds than are often heard on AM. Therefore, FM is used for most broadcasts of music and general audio (in the audio spectrum). FM radio stations use the very high frequency range of radio frequency, radio frequencies. Broadcast bands Throughout the world, the FM broadcast band falls within the VHF part of the radio spectrum. Usually 87.5 to 108.0 MHz is used, or some portion of it, with few exceptions: * In the Commo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mariette Mazarin 1908 Radio Broadcast
Mariette or Mariëtte may signify: ;Family name: * Auguste Mariette (1821–1881), pioneering Egyptologist. * Pierre-Jean Mariette (1694–1774), connoisseur and chronicler of artistic life in Paris ;Given name: * Mariette Bosch (died 2001), South African murderer executed by Botswana * Mariëtte Drewes (born 1967), Dutch chess player * Mariëtte Hamer (born 1958), Dutch politician and trade union leader * Mariette Hansson (born 1983), sometimes MaryJet or simply mononym Mariette, Swedish singer and songwriter * Mariëtte Patijn (born 1966), Dutch politician ;Others * ''Mariette'', a yacht built by Nathanael Greene Herreshoff in 1915 {{given name, type=both ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Red Barber
Walter Lanier "Red" Barber (February 17, 1908 – October 22, 1992) was an American sports announcer and author. Nicknamed "The Ol' Redhead", he was primarily identified with broadcasts of Major League Baseball, calling play-by-play across four decades with the Cincinnati Reds (1934–1938), Brooklyn Dodgers (1939–1953), and New York Yankees (1954–1966). Like his fellow sportscasting pioneer Mel Allen, Barber also developed a niche calling college and professional American football in his primary market of New York City. Biography Early years Barber was born in Columbus, Mississippi. He was a distant relative of poet Sidney Lanier and writer Tennessee Williams, Thomas Lanier Williams. The family moved to Sanford, Florida in 1918, and at the age of 21, he hitchhiked to Gainesville and enrolled at the University of Florida, majoring in education. During Barber's first year, he worked at various jobs including part-time janitor at the University Club. It was there in January 19 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sports Radio
Sports radio (or sports talk radio) is a radio format devoted entirely to discussion and broadcasting of sport, sporting events. A widespread programming genre that has a narrow audience appeal, sports radio is characterized by an often-low comedy, boisterous on-air style and extensive debate and analysis by both :wikt:host, hosts and caller (telecommunications), callers. Many sports talk stations also carry play-by-play (live commentary) of local sports teams as part of their regular programming. History In 1955, WHN New York launched the first regular sports talk program featuring a broadcaster/journalist roundtable that aired before and after Brooklyn Dodgers games. By the early 1960s, sports talk content, ranging from individual commentary to roundtable discussions, began appearing in major US markets, initially tied to play-by-play broadcasts but gradually developing unique styles and characters. Art Rust Jr. launched New York’s first interactive call-in show (WMCA) in 19 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
All-news Radio
All-news radio is a radio format devoted entirely to the discussion and broadcast of news. All-news radio is available in both local and radio syndication, syndicated forms, and is carried on both major US satellite radio networks. All-news stations can run the gamut from simulcasting an all-news television station like CNN, to a "rip and read" headline service, to stations that include live coverage of news events and long-form public affairs programming. Many stations brand themselves ''Newsradio'' but only run news during the morning and afternoon drive times, or in some cases, broadcast talk radio shows with frequent news updates. These stations are properly labeled as "news/talk" stations. Also, some National Public Radio stations identify themselves as ''News and Information'' stations, which means that in addition to running the NPR news magazines such as ''Morning Edition'' and ''All Things Considered'', they run other information and public affairs programs. History ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Digital Transmission
Data communication, including data transmission and data reception, is the transfer of data, transmitted and received over a point-to-point or point-to-multipoint communication channel. Examples of such channels are copper wires, optical fibers, wireless communication using radio spectrum, storage media and computer buses. The data are represented as an electromagnetic signal, such as an electrical voltage, radiowave, microwave, or infrared signal. '' Analog transmission'' is a method of conveying voice, data, image, signal or video information using a continuous signal that varies in amplitude, phase, or some other property in proportion to that of a variable. The messages are either represented by a sequence of pulses by means of a line code ('' baseband transmission''), or by a limited set of continuously varying waveforms (''passband transmission''), using a digital modulation method. The passband modulation and corresponding demodulation is carried out by modem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Podcasting
A podcast is a program made available in digital format for download over the Internet. Typically, a podcast is an episodic series of digital audio files that users can download to a personal device or stream to listen to at a time of their choosing. Podcasts are primarily an audio medium, but some distribute in video, either as their primary content or as a supplement to audio; popularised in recent years by video platform YouTube. In 2025, Bloomberg reported that a billion people are watching podcasts on YouTube every month. A podcast series usually features one or more recurring hosts engaged in a discussion about a particular topic or current event. Discussion and content within a podcast can range from carefully scripted to completely improvised. Podcasts combine elaborate and artistic sound production with thematic concerns ranging from scientific research to slice-of-life journalism. Many podcast series provide an associated website with links and show notes, guest bi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Music Streaming Service
A music streaming service is a type of online streaming media service that focuses primarily on music, and sometimes other forms of digital audio content such as podcasts. These services are usually subscription-based services allowing users to stream digital copyright restricted songs on-demand from a centralized library provided by the service. Some services may offer free tiers with limitations, such as advertising and limits on use. They typically incorporate a recommender system to help users discover other songs they may enjoy based on their listening history and other factors, as well as the ability to create and share public playlists with other users. It may also include customized radio or social media platforms. Streaming services saw a significant pace of growth during the 2010s, overtaking digital downloading as the largest source of revenue in the United States music industry in 2015, and accounting for a majority since 2016. As a result of its ascendance, stre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Internet Radio
Internet radio, also known as online radio, web radio, net radio, streaming radio, e-radio and IP radio, is a digital audio service transmitted via the Internet. Broadcasting on the Internet is usually referred to as webcasting since it is not transmitted broadly through wireless means. It can either be used as a stand-alone device running through the Internet, or as a software running through a single computer. Internet radio is generally used to communicate and easily spread messages through the form of talk. It is distributed through a wireless communication network connected to a switch packet network (the internet) via a disclosed source. Internet radio involves streaming media, presenting listeners with a continuous stream of audio that typically cannot be paused or replayed, much like traditional broadcast media; in this respect, it is distinct from on-demand file serving. Internet radio is also distinct from podcasting, which involves downloading rather than streaming. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
