Audio recording is (at least) 162 years old today

Happy birthday to the Phonautograph, the earliest known sound recording device.

Patented in 1857, it predats Thomas Edison’s Phonograph machine by around 20 tears.

https://www.beachamjournal.com/journal/2022/04/audio-recording-is-162-years-old-today.html

https://en.wikipedia.org/wiki/Phonautograph?wprov=sfla1

http://www.soundrecordinghistory.net/history-of-sound-recording/phonautograph-history/