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  2. History of sound recording - Wikipedia

    en.wikipedia.org/wiki/History_of_sound_recording

    Ring-and-spring microphones, such as this Western Electric microphone, were common during the electrical age of sound recording c. 1925–45.. The second wave of sound recording history was ushered in by the introduction of Western Electric's integrated system of electrical microphones, electronic signal amplifiers and electromechanical recorders, which was adopted by major US record labels in ...

  3. Valve microphone - Wikipedia

    en.wikipedia.org/wiki/Valve_microphone

    In this period, valves were also incorporated internally into microphones, and valve microphones were commercially available as a result. In the late 1920s, Dr. Harry F. Olson of RCA began developing the ribbon microphone, eventually using permanent magnets. In 1931, nine months after the introduction of Western's 618 dynamic, R.C.A. marketed a ...

  4. Sound recording and reproduction - Wikipedia

    en.wikipedia.org/wiki/Sound_recording_and...

    The first electrical recording issued to the public, with little fanfare, was of November 11, 1920, funeral service for The Unknown Warrior in Westminster Abbey, London. The recording engineers used microphones of the type used in contemporary telephones. Four were discreetly set up in the abbey and wired to recording equipment in a vehicle ...

  5. Autograph Records - Wikipedia

    en.wikipedia.org/wiki/Autograph_Records

    Autograph was the first U.S. record label to release recordings made electrically with microphones, as opposed to the acoustical or mechanical method that was more commonly used. [1] According to author Brian Rust, Marsh's first electrical records were made in 1924.

  6. RCA Type 77-A microphone - Wikipedia

    en.wikipedia.org/wiki/RCA_Type_77-A_microphone

    The RCA Type 77-A microphone was a simplex (uni-directional) ribbon microphone, 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.

  7. Electret microphone - Wikipedia

    en.wikipedia.org/wiki/Electret_microphone

    Electret materials have been known since the 1920s and were proposed as condenser microphone elements several times, but they were considered impractical until the foil electret type was invented at Bell Laboratories in 1961 by Gerhard Sessler and James West, using a thin metallized Teflon foil.

  8. Orlando R. Marsh - Wikipedia

    en.wikipedia.org/wiki/Orlando_R._Marsh

    Orlando R. Marsh (August 6, 1881 – September 7, 1938) [1] was an electrical engineer raised in Wilmette, Illinois. [2] In early 1920s Chicago, Illinois he pioneered electrical recording of phonograph discs with microphones when acoustic recording with horns was commonplace.

  9. Raymond A. Litke - Wikipedia

    en.wikipedia.org/wiki/Raymond_A._Litke

    Raymond A. Litke (1920-1986) was an American electronic engineer, the inventor of a practical wireless microphone, and the first to patent the wireless microphone.He was born and raised on a farm near Alma, Kansas, but spent most of his adult life in San Jose, California.

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