Tonotopy (from Greek tono- and topos = place: the place of tones)'s the spatial arrangement of where sound's perceived, transmitted, or received. It refers to the fact that tones close to each other in terms of frequency are represented in topologically neighbouring neurons in the brain. Tonotopic maps are a particular case of topographic organization. There's tonotopy in the cochlea on the basilar membrane, the small snail-like structure in the inner ear that sends information about sound to th… (More on Tonotopy)