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A slide show about the telephone and Alexander Graham Bell

A slide show about the telephone and Alexander Graham Bell

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Transcript

  • 1. The Telephone A great invention!
  • 2. Alexander Graham Bell
    • Born March 3, 1847, Alexander Graham Bell became the inventor of the telephone on March 10, 1876.
    • Bell taught people who were deaf, therefore, he was sensitive to sound vibrations and their travel.
  • 3. About the telephone!
    • The telephone is a device that transmits speech electrically. It’s a wire-based electrical system.
    • Human speech can be turned into variations in electrical current that could be transmitted through wires from one place to another.
    • By 1880, there were 47,900 telephones in the United States!
  • 4. Why is it important?
    • Imagine yelling 3 blocks over to your neighbor in the middle of night, just to talk about something. Fun right? Not really, that’s why the fun is an important invention, that way you can communicate without leaving the comforts of your house.
    • It opened the door for intercoms, walkie-talkies, radio, fax transmission and even internet!
  • 5. Sources
    • http://capvidres.com/yahoo_site_admin/assets/images/tn_old_telephone.281183212_std.jpg
    • http://www.alexandergrahambell.org/
    • http://sln.fi.edu/franklin/inventor/bell.html