時,三個詞发音均不相同: 音位升阶(英语:Upstep (phonetics)) 聲調台階 聲調下降(英语:Downdrift) 浮动声调 BeckmanMary E. & Janet B. Pierrehumbert, (1986). "Intonational Structure in English
phonology, with some implications for casual speech. Kingston, John C.; Beckman, Mary E. (编). Papers in laboratory phonology I: Between the grammar and physics
Accompany an Exhibit by the Beckman Center for the History of Chemistry (Publication / Beckman Center for the History of Chemistry); Mary E. Bowden; Chemical