The high rising terminal (HRT), also known as upspeak, uptalk, rising inflection, upward inflection, or high rising intonation (HRI), is a feature of some variants of English where declarative sentence clauses end with a rising-pitch intonation, until the end of the sentence where a falling-pitch is applied.
Empirically, one report proposes that HRT in American English and Australian English is marked by a high tone (high pitch or high fundamental frequency) beginning on the final accented syllable near the end of the statement (the terminal), and continuing to increase in frequency (up to 40%...