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An early experimental non-magnetic tape recorder patented in 1886 by Alexander Graham Bell's Volta Laboratory Stock Photo - Alamy
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Sound Experiments at the Volta Laboratory - Hear My Voice | Albert H. Small Documents Gallery | Smithsonian's National Museum of American History
![File:Graphophone with wax recording of Alexander Melville Bell, Alexander Graham Bell, deposited in October 1881 - National Museum of American History - DSC00104.jpg - Wikimedia Commons File:Graphophone with wax recording of Alexander Melville Bell, Alexander Graham Bell, deposited in October 1881 - National Museum of American History - DSC00104.jpg - Wikimedia Commons](https://upload.wikimedia.org/wikipedia/commons/4/44/Graphophone_with_wax_recording_of_Alexander_Melville_Bell%2C_Alexander_Graham_Bell%2C_deposited_in_October_1881_-_National_Museum_of_American_History_-_DSC00104.jpg)
File:Graphophone with wax recording of Alexander Melville Bell, Alexander Graham Bell, deposited in October 1881 - National Museum of American History - DSC00104.jpg - Wikimedia Commons
What Did Alexander Graham Bell's Voice Sound Like? Berkeley Lab Scientists Help Find Out - Berkeley Lab – News Center
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Studying Sound: Alexander Graham Bell (1847–1922)- Hear My Voice | Albert H. Small Documents Gallery | Smithsonian's National Museum of American History
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Hear My Voice: Alexander Graham Bell and the Origins of Recorded Sound | National Museum of American History
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