Residue pitch is an event tone signifying repetitive beat occurrence

Evidence

This sheds some light on residue pitch. Nothing drastic happens to the perceived 200 Hz tone in going continuously from 1042 and 842 as generators to 1000 and 800. This implies that any tone heard along with the 200 Hz pitch is an event tone—that is, a tone generated in our sound processing hardware and software to signify the occurrence of repetitive events (beats) at a frequency of 200 Hz in either case. — Eric J. Heller, Why You Hear What You Hear- An…, 2301

Categorization

• DEFINE: Defines ‘event tone’ — a pitch generated by the auditory system to mark repetitive events — which is foundational to the residue/hearing question.