The first sound to be recorded by a machine wasn't intended ever to be heard again—but modern researchers found a way around that problem.
History of Phonograph - Invention of First Phonograph
First recording of human sound was made today in 1860: Interesting facts about the event - India Today
Rehearing the history of sound, one ghostly transmission at a time - The Boston Globe
Into The Groove review: Jonathan Scott explores sound technology history
TIMELINE THE EVOLUTION OF MUSIC TECHNOLOGY 1859 Frenchman Édouard-Léon Scott de Martinville invents the first device capable of recording sound. Know. - ppt download
Origins of Sound Recording: Thomas Edison - Thomas Edison National Historical Park (U.S. National Park Service)
The first phonograph Cut Out Stock Images & Pictures - Alamy
Scott Edison's Instagram, Twitter & Facebook on IDCrawl
Thomas Edison - Inventor of the Phonograph
Phonograph - Wikipedia