15th International Congress of Phonetic Sciences (ICPhS-15)

Barcelona, Spain
August 3-9, 2003

(End) Truncation of the Thai Contour Tones on Different Durations of TBUs

Rungpat Roengpitya

University of California at Berkeley, USA

Tones may have different shapes when they sit on different durations of tone-bearing units (TBUs). When a tone sits on a shorter TBU, 'end truncation', may occur, where the terminal portions are lost or shifted to the next syllable. This paper focuses on 'end truncation' in the two Thai contour tones: rising-falling (RF) and falling-rising (FR).
   Shorter and longer contours with end truncation were studied and the locations of the truncated portions were quantified based on the three main landmarks (maxima and minima in the first and second derivatives of a 7th order polynomial fit to the raw pitch track). It was found that each contour tone keeps its prominent information on its particular portion in order to be distinguished from other tones.

Full Paper

Bibliographic reference.  Roengpitya, Rungpat (2003): "(end) truncation of the Thai contour tones on different durations of TBUs", In ICPhS-15, 1109-1112.