Bell's Phonautograph: sounds directed to the mouthpiece caused a membrane, modelled on the action of the human ear, to vibrate, so moving a stylus which drew tracings on smoked glass. From The Du Moncel Le Telephone, Paris, 1878. Bell developed this instrument when working on a method of teaching deaf children to speak, his idea was that if a person who spoke normally made a trace the deaf mute would learn to speak clearly by obtaining a similar trace for a given sound.
Bell's Phonautograph: sounds directed to the mouthpiece caused a membrane, modelled on the action of the human ear, to vibrate, so moving a stylus which drew tracings on smoked glass. From The Du Moncel Le Telephone, Paris, 1878. Bell developed this instrument when working on a method of teaching deaf children to speak, his idea was that if a person who spoke normally made a trace the deaf mute would learn to speak clearly by obtaining a similar trace for a given sound.
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Photo credit: © World History Archive / Alamy / Afripics
License: Licensed
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Keywords: 1878., archival, archive, bell, childrenlearn, du, earvibratestylus, historical, history, le, moncel, phonautograph, phonautographmouthpiecemembranehuman, speakdeafsound, telephoneparis1878deaf
