HOW THE TELEPHONE WORKS [Main Title]

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  • Title: HOW THE TELEPHONE WORKS [Main Title]
  • Film Number: COI 1182
  • Other titles:
  • Summary:
  • Description: An introduction featuring a man in an open top car illustrates different forms of communication. Diagrams and film then show how sound waves are propagated and how the carbon microphone and earpiece of a telephone operate.
  • Alternative Title:
  • Colour: B&W
  • Digitised: No
  • Object_Number: COI 1182
  • Sound: Sound
  • Access Conditions: IWM Attribution: © IWM
  • Featured Period: 1946-1975
  • Production Date: 1952
  • Production Country: GB
  • Production Details: Central Office of Information (Production sponsor) Crown Film Unit (Production company)
  • Personalities, Units and Organisations:
  • Keywords:
  • Physical Characteristics: Colour format: B&W Sound format: Sound Soundtrack language: English Title language: English
  • Technical Details: Format: 16mm Number of items/reels/tapes: 1 Footage: 241 ft; Running time: 7 mins
  • HD Media:
  • Link to IWM Collections page:

    COI 1182

  • Related IWM Collections Objects:
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