A group of historians audio discovered what may be the oldest record of the human voice.

The 10 seconds, the clip is a woman sings a part of the name of French song “Au Clair de la Lune”, and it was in 1860 - 17 years older than Thomas Edison “Mary had a little lamb.”

The song was a phonautograph, a Paris ring road by the inventor Edouard-Leon Scott Martinville. The device uses a needle to scratch sound waves on paper by the soot of a lamp.

Audio historian David Giovannoni, who discovered phonautograph, France, the patent, after a study of its existence in the archives of Paris, some - he travelled to the French capital a week later.