Glissando Illusion

The glissando illusion is an auditory illusion produced when a tone of fixed pitch, such as a synthesized oboe note, is played at the same time as a sine wave that glides continuously up and down in pitch, with both sounds switched back and forth between stereo loudspeakers. Listeners typically perceive the fixed pitch tone as jumping abruptly from speaker to speaker while the gliding tone instead seems to move smoothly and continuously through space, with right handed listeners generally hearing it travel from left to right as its pitch rises and reverse direction as the pitch falls. The psychologist Diana Deutsch first documented and demonstrated the illusion in her 1995 work Musical Illusions and Paradoxes, and it is used as evidence that the auditory system separates pitch information from spatial location information and can assign them incorrectly to the wrong sound source. This description is adapted from Wikipedia contributors under CC BY-SA 4.0; changes were made. https://creativecommons.org/licenses/by-sa/4.0/