Shepard Tone - Designed by psychologist Roger Shepard at Bell Labs, this illusion consists of a set of tones that appear to perpetually rise or slide. The illusion is created by super-positioning pure tones (sine waves) an octave apart. A temporal illusion is a distortion in the notion of https://phantom-abyss-game28382.alltdesign.com/illusion-of-kundun-mu-online-options-54758386