A further scenario of interference outcomes when two tones sounded together develop a subjectively read third tone. When this 3rd tone is reduce in pitch than the first two, it is called a difference tone; i.e., its frequency is the distinction between the frequencies of the two first tones. https://listbell.com/story9537041/the-smart-trick-of-illusion-of-kundun-mu-online-that-nobody-is-discussing