Abstract: Sounds are distally located events that require the presence of a medium. Events in which vibrating objects or interacting bodies disturb a surrounding medium in a wave-like manner best satisfy the desiderata for a theory of sounds. Such medium-disturbing events are individuated primarily in terms of spatio-temporal continuity. Worries about the metaphysical status of relational or causal events and about the perceptibility of medium-disturbing events are answered.

Keywords: medium-disturbing events, causal events, perception of causation, sound individuation,