Ideas from books, articles & podcasts.
MORE IDEAS FROM THE SAME ARTICLE
In 1910, Nathaniel Baldwin invented headphones. A prototype was sent to Lt. Comdr. A. J. Hepburn of the U.S. Navy. Hepburn tested the device and found it worked unexpectedly well to transmit sound.
created 15 ideas
created 3 ideas
I read this article about protecting ears with a new update from IOs system.Hope it can help you.
❤️ Brainstash Inc.