Auditory illusion

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. In short, audio illusions highlight areas where the human ear and brain, as organic, makeshift tools, differ from perfect audio receptors (for better or for worse).

Examples of auditory illusions:
 * the Shepard tone or scale, and the Deutsch tritone paradox
 * hearing a missing fundamental frequency, given other parts of the harmonic series
 * Various psychoacoustic tricks of lossy Audio compression
 * Octave illusion/Deutsch's High-Low Illusion
 * Deutsch's scale illusion
 * Glissando illusion
 * Illusory continuity of tones
 * McGurk Effect
 * Rorschach Audio