Another situation of interference effects when two tones sounded alongside one another develop a subjectively listened to third tone. When this 3rd tone is decreased in pitch than the first two, it is referred to as a variation tone; i.e., its frequency will be the distinction between the frequencies https://bookmarkpagerank.com/story19769082/illusion-of-kundun-mu-online-things-to-know-before-you-buy