 According to the Located Event Theory, sounds are events happening to material objects. They are located at their source, and are identical with, or at least supervene on, vibration processes in the source. On this view (Casati &amp; Dokic 1994), auditory perception of sounds requires a medium which transmits information from the vibrating object to the ears; however, the transmitting medium is not essential to the existence of sounds. One can see at once the fit of this view with those features of sound which were sources of trouble in the cases discussed above when criticizing proximal and medial theories.