On his <a href="https://en.wikipedia.org/wiki/Phonautograph" id="mwaQ" rel="mw:WikiLink" title="Phonautograph">phonautograph</a> machine, <a href="https://en.wikipedia.org/wiki/Édouard-Léon_Scott_de_Martinville" id="mwag" rel="mw:WikiLink" title="Édouard-Léon Scott de Martinville">Édouard-Léon Scott de Martinville</a> makes the <a href="https://en.wikipedia.org/wiki/History_of_sound_recording" id="mwaw" rel="mw:WikiLink" title="History of sound recording">oldest known recording</a> of an audible human voice.