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RCA Type 44
The RCA Type 44 microphone is a bi-directional ribbon microphone, or pressure-gradient microphone, first introduced by the RCA Corporation in 1931. History Dr. Harry F. Olson began working for RCA Laboratories, where he developed ribbon microphones, first with field coils and then with permanent magnets, resulting in the first ribbon microphones with bi-directional pickup pattern, the RCA Photophone PB-17 and PB-31, introduced in 1931. The PB-31 was employed by Radio City Music Hall in 1932. Also in 1931, RCA introduced the Type 44-A Velocity Microphone. A smaller and lower-priced version of the uni-directional Type 77-A, the 44-A's smooth sound and defined pattern control reduced the effect of reverberation on soundstages and offered higher gain-before-feedback in live sound applications, making it a staple of the audio recording and broadcasting industries. In 1940, RCA updated the Type 44 with improved magnet material to introduce the Type 44-B and Type 44-BX. The 44-B and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ribbon Microphone
A ribbon microphone, also known as a ribbon velocity microphone, is a type of microphone that uses a thin aluminum, duraluminum or nanofilm of electrically conductive ribbon placed between the poles of a magnet to produce a voltage by electromagnetic induction. Ribbon microphones are typically bidirectional, meaning that they pick up sounds equally well from either side of the microphone. Principle of operation In a moving-coil microphone, the diaphragm is attached to a light movable coil that generates a voltage as it moves back and forth between the poles of a permanent magnet. In ribbon microphones, a very thin light metal ribbon (usually corrugated) is suspended between the poles of a magnet. As the ribbon vibrates, a voltage is induced at right angles to both the ribbon velocity and magnetic field direction and is picked off by contacts at the ends of the ribbon. Ribbon microphones are also called "velocity microphones" because the induced voltage is proportional to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RCA 44 Of CBS 20071104
RCA Corporation was a major American electronics company, which was founded in 1919 as the Radio Corporation of America. It was initially a patent trust owned by General Electric (GE), Westinghouse, AT&T Corporation and United Fruit Company. In 1932, RCA became an independent company after the partners were required to divest their ownership as part of the settlement of a government antitrust suit. An innovative and progressive company, RCA was the dominant electronics and communications firm in the United States for over five decades. In the early 1920s, RCA was at the forefront of the mushrooming radio industry as a major manufacturer of radio receivers, and the exclusive manufacturer of the first superheterodyne sets. The company also created the first nationwide American radio network, the National Broadcasting Company (NBC). RCA was also a pioneer in the introduction and development of television, both black and white and especially color television. Throughout most of t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harry F
Harry may refer to: Television *Harry (American TV series), ''Harry'' (American TV series), 1987 comedy series starring Alan Arkin *Harry (British TV series), ''Harry'' (British TV series), 1993 BBC drama that ran for two seasons *Harry (New Zealand TV series), ''Harry'' (New Zealand TV series), 2013 crime drama starring Oscar Kightley#Professional career, Oscar Kightley *Harry (talk show), ''Harry'' (talk show), 2016 American daytime talk show hosted by Harry Connick Jr. People and fictional characters *Harry (given name), a list of people and fictional characters with the given name, including **Prince Harry, Duke of Sussex (born 1984) *Harry (surname), a list of people with the surname Other uses *"Harry", the tunnel used in the Stalag Luft III escape ("The Great Escape") of World War II *Harry (album), ''Harry'' (album), a 1969 album by Harry Nilsson *Harry (derogatory term), derogatory term used in Norway *Harry (newspaper), ''Harry'' (newspaper), an underground newspaper in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Radio City Music Hall
Radio City Music Hall (also known as Radio City) is an entertainment venue and Theater (structure), theater at 1260 Sixth Avenue (Manhattan), Avenue of the Americas, within Rockefeller Center, in the Midtown Manhattan neighborhood of New York City. Nicknamed "The Showplace of the Nation", it is the headquarters for the Rockettes. Radio City Music Hall was designed by Edward Durell Stone and Donald Deskey in the Art Deco style. Radio City Music Hall was built on a plot of land that was originally intended for a Metropolitan Opera House, although plans for the opera house were canceled in 1929. It opened on December 27, 1932, as part of the construction of Rockefeller Center. The 5,960-seat Music Hall was the larger of two venues built for Rockefeller Center's "Radio City" section, the other being the RKO Roxy Theatre (later the Center Theatre (New York City), Center Theatre); the "Radio City" name came to apply only to Radio City Music Hall. It was largely successful until the 19 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
RCA Type 77-A Microphone
The RCA Type 77-A microphone was a simplex (''uni-directional'') ribbon microphone A ribbon microphone, also known as a ribbon velocity microphone, is a type of microphone that uses a thin aluminum, duraluminum or nanofilm of electrically conductive ribbon placed between the poles of a magnet to produce a voltage by electroma ..., the forerunner of the RCA Type 77-DX microphone. The 77-A was designed Dr. Harry F. Olson in the late 1920s or early 1930s; prototypes are rumored to have existed in 1929 and 1930, but the 77-A was not announced until 1932. The 77-A would set the standard for all other RCA ribbon microphone comparisons for the next 40 years. Construction It featured a spiral acoustic labyrinth inside the case and two vertical in-line ribbons which enabled it to be uni-directional. References External linksRCA Type 77-A information from www.coutant.org {{product-stub Ribbon microphones ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Audio Recording
Sound recording and reproduction is the electrical, mechanical, electronic, or digital inscription and re-creation of sound waves, such as spoken voice, singing, instrumental music, or sound effects. The two main classes of sound recording technology are analog recording and digital recording. Acoustic analog recording is achieved by a microphone diaphragm that senses changes in atmospheric pressure caused by acoustic sound waves and records them as a mechanical representation of the sound waves on a medium such as a phonograph record (in which a stylus cuts grooves on a record). In magnetic tape recording, the sound waves vibrate the microphone diaphragm and are converted into a varying electric current, which is then converted to a varying magnetic field by an electromagnet, which makes a representation of the sound as magnetized areas on a plastic tape with a magnetic coating on it. Analog sound reproduction is the reverse process, with a larger loudspeaker diaphragm c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Broadcasting
Broadcasting is the data distribution, distribution of sound, audio audiovisual content to dispersed audiences via a electronic medium (communication), mass communications medium, typically one using the electromagnetic spectrum (radio waves), in a :wikt:one-to-many, one-to-many model. Broadcasting began with AM radio, which came into popular use around 1920 with the spread of vacuum tube radio transmitters and radio receiver, receivers. Before this, most implementations of electronic communication (early radio, telephone, and telegraph) were wikt:one-to-one, one-to-one, with the message intended for a single recipient. The term ''broadcasting'' evolved from its use as the agricultural method of sowing seeds in a field by casting them broadly about. It was later adopted for describing the widespread distribution of information by printed materials or by telegraph. Examples applying it to "one-to-many" radio transmissions of an individual station to multiple listeners appeared as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Frank Sinatra (1944 CBS Radio Publicity Photo)
Francis Albert Sinatra (; December 12, 1915 – May 14, 1998) was an American singer and actor. Nicknamed the "Chairman of the Board" and "Ol' Blue Eyes", he is regarded as one of the most popular entertainers of the 20th century. Sinatra is among the world's best-selling music artists, with an estimated 150 million record sales globally. Born to Italian immigrants in Hoboken, New Jersey, Sinatra began his musical career in the swing era and was influenced by the easy-listening vocal style of Bing Crosby. He joined the Harry James band as the vocalist in 1939 before finding success as a solo artist after signing with Columbia Records in 1943, becoming the idol of the " bobby soxers". In 1946, Sinatra released his debut album, '' The Voice of Frank Sinatra''. He then signed with Capitol Records and released several albums with arrangements by Nelson Riddle, notably ''In the Wee Small Hours'' (1955) and '' Songs for Swingin' Lovers!'' (1956). In 1960, Sinatra left Capitol R ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
