On 9th March 2008, this ethereal 10 second clip of a man (or woman) singing the French folk song "Au Clair de la Lune", was played for the first time in 150 years. It is currently thought to be the oldest known recorded human voice, predating Thomas Edison's first phonograph recording of 1877. The "phonautograph", created by etching soot-covered paper by Parisian inventor Edouard-Leon Scott de Martinville, was played by US scientists using a "virtual stylus" to read the lines. The recording was initially believed to be the voice of a woman or adoles
Source,Credit and more details at-https://youtu.be/75UrxueiP-4
Source and Credit :- https://www.youtube.com/watch?v=uBL7V3zGMUA&spfreload=5