Beating between two high-frequency tones can create a phantom low-frequency tone

Evidence

There are two ways to extend the notion of beats. One is to keep the percentage change in frequency small between the two sinusoids but raise the base frequency so high that the beats repeat with a frequency in the audio range. An example: add 3000 Hz and 3080 Hz sinusoids; the 80 Hz beating may produce an 80 Hz “phantom” beat tone that has no basis in any partials that are present. — Eric J. Heller, Why You Hear What You Hear- An…, 2223

Categorization

• QUESTION: Where in chapter 25 does this beat-tone topic get fully explained — this seems like it deserves a deeper mechanistic account.