https://designingsound.org/tag/phonautograph/
phonautograph
phonautograph
https://www.cultofweird.com/science/alexander-bell-ear-phonautograph/
Dead Ear Phonautograph - Alexander Graham Bell's Morbid Invention
Oct 27, 2020 - Before he invented the telephone, Alexander Graham Bell created the ear phonautograph, a device that recorded sound using a dead man's ear.
alexander graham belldeadearphonautographmorbid