An auditory illusion is an illusion of hearing, the sound equivalent of an optical illusion: the listener hears either sounds which are not present in the stimulus, or "impossible" sounds.
... (born 1922), undersea explorer
Francisco Pizarro, (1471-1541), conqueror of the Inca Empire
Marco Polo, (1254-1323), travelled to China in the 13th century.
John ...