One of the most widespread – and widely studied – properties of speech fundamental frequency (Fo) is a tendency to decline gradually during the course of utterances. This tendency has been given a variety of names, of which the best known is probably DECLINATION. This is the term I shall use in this paper. The purpose of the paper is to review past work on declination as it affects the phonological and phonetic modelling of Fo contours, and to outline some ideas for the empirical resolution of the issues that emerge from the discussion.
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D. Robert Ladd (1984) studied this question.
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