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Transmitter (microphone) from the telephone by Philipp Reis

1863

Museum for Communication Frankfurt, Museum Foundation Post and Telecommunication

Museum for Communication Frankfurt, Museum Foundation Post and Telecommunication

To convert acoustic vibrations into electrical impulses, Reis used a membrane made of pig intestine that was physically agitated by the sound waves of speech . The membrane was coupled with an electrical contact, which was closed by the vibrations. The electrical current varied with the pressure exerted on the contact.

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  • Title: Transmitter (microphone) from the telephone by Philipp Reis
  • Date Created: 1863
  • Location Created: Frankfurt am Main, Hessen, Deutschland
  • Rights: © Museumsstiftung Post und Telekommunikation
  • Material: Metalle, Holz, Schweinsdarm

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