This sound from 1860 is the oldest recorded human voice there is. It is a woman singing a french folk song, which was etched into a sooty piece of paper using a device called a phonautograph. The recording was made by digitally sonifying the engraving. David Giovanonni, the historian who found the recording said, "The fact is it's recorded in smoke. The voice is coming out from behind this screen of aural smoke."