An improved multi-level vehicle parking facility including a device for emitting an audible sound, preferably a well known song, on each parking level, with a visual display specifically identifying the audible sound emitted on each such level. Each level has a different audible sound emitted thereon...http://www.google.com/patents/US4674937?utm_source=gb-gplus-sharePatent US4674937 - Multi-level vehicle parking facility
