The Relational Event Theory and the Located Event Theory differ concerning the way in which they account for the audible relationship between sound and sound source. A manner of characterizing this relation within the Relational Event Theory is the part-whole relationship, according to which sounds are heard as the constituent parts of wholes that are everyday audible events (O’Callaghan 2011a, 2011b). This is a Mereological View, which presupposes a distinction between sound and the broad event