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The very first patent for in-ear headphones, invented by Ernest Mercadier in 1891, from this fascinating history of headphones.
Just a few decades later, society beheld the menace of recorded sound.

The very first patent for in-ear headphones, invented by Ernest Mercadier in 1891, from this fascinating history of headphones.

Just a few decades later, society beheld the menace of recorded sound.

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    Very neat
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    Crazy!
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