International Sound Distribution Systems Microphones 5760, 5765

IBM; Armonk, N.Y.

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  • Année
  • 1935 ??
  • Catégorie
  • Microphone ou élément Pick-Up / tête de lecture
  • Radiomuseum.org ID
  • 323258

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 Spécifications techniques

  • Gammes d'ondes
  • - sans
  • Tension / type courant
  • Pas d'alimentation nécessaire
  • Matière
  • Boitier métallique
  • De Radiomuseum.org
  • Modèle: International Sound Distribution Systems Microphones 5760, 5765 - IBM; Armonk, N.Y.
  • Forme
  • Formes diverses décrites en notes
  • Remarques

  • There were two basic microphone types available from IBM in the 1930s: Velocity* and dynamic.
    Velocity microphones were highly directional and ideal for situations in which the possibility of sound feedback was present; dynamic mikes were used with associated IBM high gain amplifiers and sound reproducers for high quality reproduction of voice and musical frequencies.

    Among the velocity microphones* offered by IBM during the years that the Big Band sound filled the air waves were the
    5760-3 desk,
    5760-7 footlight,
    5760-4 banquet and
    5760-5 studio floor types.

    Dynamic microphones marketed at the same time included the
    5765-3 desk,
    5765-7 footlight,
    5765-4 banquet and
    5765-5 studio floor types.
    When lightness and portability were key factors, IBM also offered a
    5760-1 lapel type and
    5760-2 hand-type microphones.

    All of the microphones, regardless of type, were finished in statuary bronze.

    Wikipedia:
    *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.

    The voltage output of older ribbon microphones is typically quite low compared to a dynamic moving coil microphone, and a step-up transformer is used to increase the voltage output and increase the output impedance

  • Littérature
  • - - Manufacturers Literature (IBM online archives - microphones)
  • Auteur
  • Modèle crée par Heribert Jung. Voir les propositions de modification pour les contributeurs supplémentaires.

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