bell - Alexander Graham Bell Visible Speech He taught deaf...

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Alexander Graham Bell • Born in Edinburgh, Scotland in 1847 • Most famous for his invention of the telephone • Immigrated to the United States in 1871 Visible Speech • He taught deaf mutes, and publicized the system called Visible Speech • Visible Speech shows how the lips, tongue, and throat are used in the articulation of sound Works with deafness • In 1872 Bell founded a school to train teachers of the deaf • This school became part of Boston University Bells Inventions • Telephone • Photophone-transmits speech by light rays • Audiometer-used to measure acuteness of hearing • Induction Balance-used to locate metal objects in human bodies • 1st Wax Recording Cylinder in 1886 Telephone • The first telegraph message was on March 19, 1876 • The first words spoken were “Mr Watson, come here, I want you.” Telephone • The telephone is basically an electric instrument that allows the transmission of sound communication to be possible over the entire world through fiber optics
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bell - Alexander Graham Bell Visible Speech He taught deaf...

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