(Chapter 8) Footnote 11:

See, for example, Andrés de Laguna, Anatomica methodus (1535): “Hearing, in fact, is nothing other than a certain impulse created by the collision of solid bodies striking as sharply as possible upon the auditory nerves or that same very sharp collision of the impulse itself with the nerves mentioned, by reason of which the brain is affected at the same time.” (tr. Lind 1975 p. 292). The most likely ancient source of the Renaissance wave theory of sound is Boethius (c. 480-524), De institutione musica 1.14: “In the case of sounds, something of the same sort occurs as when a stone is thrown out and falls into a pool of other calm water. The stone first produces a wave with a very small circumference. Then it causes the waves to spread out in ever wider circles until the motion, growing weaker as the waves spread out, finally ceases. ... In the same way, then, when air is struck and produces a sound, it impels other air next to it and in a certain way sets a rounded wave of air in motion, and is thus dispersed and strikes simultaneously the hearing of all who are standing around.” (tr. Cohen and Drabkin 1948, 293f.) Cf. Zeno of Citium (335-263 BC, founder of the Stoic school) in Diogenes Laertius 7.158.