Too bad that the article doesn't even attempt to explain what is going on mathematically. Dissonance is closely related to beating[1], the phenomenon where the

Too bad that the article doesn't even attempt to explain what is going on mathematically. Dissonance is closely related to beating[1], the phenomenon where the sum of two slightly different frequencies results in an oscillation at a low frequency. [1] https://en.wikipedia.org/wiki/Beat_%28acoustics%29 https://en.wikipedia.org/wiki/Beat_%28acoustics%29