When were the first in-ear headphones invented?
But that's nothing compared to the genius of French engineer Ernest Mercadier, who was awarded a patent for the first ever in-ear headphones in 1891. Designed to be used by telephonists, they even boasted earbuds to block out external sounds.
Did they have headphones in the 50's?
The 1950s heralded a new era of personal listening enjoyment thanks to several key developments: Rising incomes, the invention of stereo and the introduction of the LP. ... Koss, an American jazz musician, capitalized on these trends by introducing the first ever stereo headphones, the SP/3.