The disc was submitted to the noninvasive optical sound recovery process on Library of Congress equipment developed by the Berkeley Lab, allowing for the contents of the recording to be audibly matched to the transcript and for the positive identification of Bell’s voice. The transcript, signed and dated by Bell and ending with “in witness whereof, hear my voice, Alexander Graham Bell,” was matched with a recently identified wax-on-binder-board disc that carries the initials “AGB” and the same date-April 15, 1885. In the museum’s collection from Bell’s Washington, D.C., Volta laboratory, which includes 200 of the earliest audio recordings ever made, was a loose piece of paper discovered by researchers to be a transcript of a recording. On March 10, 1876, three days after his patent was issued, Bell and his assistant. On March 7, 1876, Alexander Graham Bell, scientist, inventor and innovator, received the first patent for an apparatus for transmitting vocal or other sounds telegraphically, a device he called the telephone. The Smithsonian’s National Museum of American History, through a collaborative project with the Library of Congress and Lawrence Berkeley National Laboratory, has identified Bell’s voice for the first time. Alexander Graham Bell’s Large Box Telephone. Until now, no one knew what the inventor himself sounded like. The inventions of Alexander Graham Bell-most famously the telephone but also methods of recording sound-have allowed people to hear each other’s voices for more than 130 years.
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