RLW 19106v . - Among the folios of anatomical studies, Leonardo notes on this one, datable to 1508-1510, experiments on the analogy between hydraulics and acoustics. In particular, he speaks of an experiment to be conducted at home, returning to observations on a barrel at Campi Bisenzio: "You will have heard that, in the portion of a wave of air that passes through a narrow opening, a human voice is closed in, as I saw at Campi one that was closed into a cask open at the bunghole (an opening made in the barrel at the point of its maximum diameter, where the bung is inserted).
© Alessandro Vezzosi
Last update 26/feb/2008