Declination-adjusted normalisation of Cantonese citation tones

Phil Rose

Wednesday, December 14th, 2022, 2.30pm – 3pm

Abstract

 An experiment is described to see if the normalisation of citation tone fundamental frequency (F0) can be improved by taking into account its occasion-specific decay. An optimum baseline z-score normalization of the F0 of ten Cantonese speakers’ unstopped citation tones without such adjustment gave about a twenty-fold reduction in the between-speaker tonal variance (normalisation index = 21.3). It is shown that adjusting for F0 decay by simply using the linear slope of the phonologically level tones can improve on this baseline normalization a little, by up to about 11% (NI = 23.6). The result is also a representation closer to the tonal pitch.