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The Edison Phonograph Was the First Time Machine
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Thomas Edison received the first prototype of the phonograph just 30 hours after sketching out the plans. The inventor placed the needle against a sheet of tinfoil, turned the crank, and spoke a few lines into a mouthpiece.
When he finished speaking, he played back the recording.
“Mary had a little lamb,” the recording began. “Its fleece was white as snow.”
When Edison heard those words in , it was the first time that a human voice had been captured in a medium and played back as sound.
Today, we take sound recording for granted, but in the late s, it was a revolutionary breakthrough.
“Up to that time, sound had always been transient,” said David Giovannoni, a historian of sound recording from Durwood, Md.
The idea that speech, rather than being written on the wind, could be preserved and repeated changed the relation
