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myNotes
6 Edison’s tinfoil phonograph was the first device to
record sound and play it back. It was a major scientific
breakthrough and earned him his nickname, The
Wizard of Menlo Park. That’s pretty impressive for
a man who was partially deaf.
To record: To listen:
Cover the cylinder Stop and place the
with tin. Rotate it and needle back to the start.
speak into the horn. Rotate the cylinder.
The voice vibrates The needle rides over
a needle on the end the sound grooves and
of the horn. plays your recording.
The vibrating needle
makes small sound grooves
on the rotating tin.
device A device is a tool or machine that has a certain purpose.
breakthrough If you make a breakthrough, you make an important
discovery after many tries.
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