Shepard Tone - Made by psychologist Roger Shepard at Bell Labs, this illusion is made up of a set of tones that appear to perpetually increase or fall. The illusion is made by super-positioning pure tones (sine waves) an octave apart. Other illusions are based on normal assumptions the https://homeworld321199.blogdigy.com/examine-this-report-on-illusion-of-kundun-mu-online-54120618