- Published 2003

backdrop against which F0 is interpreted linguistically”. Tonal coherence within the prosodic phrase 73 However, Liberman and Pierrehumbert (1984) show that the major factors shaping the F0 contour are local ones, and, consequently, that it is not necessary to assume any time-dependent declination. The downward trend of F0 is explained by a combination of a final lowering effect and the usage of stepping accents. Since the sequences of stepping accents do not converge to zero, a nonzero asymptote, r (the reference line), is needed in the model. The reference line, r, is abstract and lies somewhere between the F0 end point and the lowest peak. The following rule shows the exponential decay to the nonzero asymptote proposed by Liberman and Pierrehumbert: (4c) xi+1 – r = s (xi – r) where s is a constant less than 1, and xi is peak height (in Hz) in position i (Liberman and Pierrehumbert 1984: 186). Some of the main points that Bruce (1982a and 1984) incorporates in the revised Lund model are, firstly, that the overall F0 course of an utterance can be expressed in terms of the relations between successive accents. The range of the F0 accent fall decreases for successive accents (bitonal HL accents) and this F0 downdrift is described by a local rule, where each F0 minimum’s value is a constant ratio of the preceding F0 minimum’s value. The following rule describes the exponential nature of accent minima scaling in Bruce’s model:

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@inproceedings{Hansson2003TRAVAUXDL,
title={TRAVAUX DE L’INSTITUT DE LINGUISTIQUE DE LUND 43 Prosodic Phrasing in Spontaneous Swedish},
author={Petra Hansson and Maria Hansson},
year={2003}
}