When were earphones invented?

Answer Headphones appeared in the latter part of the 19th century (the end of the 1800's). History may have lost the information relating to their invention and inventor.

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Why were earphones invented?

How were earphones invented?

They were invented the way they were invented!

When and who invented the earphones?

When were the first earphones released?

They were receiving instructions and timings. Also, because sound travels much slower than light, each performer would have had the music directly in their earphones to ensure they all stayed in time.