Abstract
The use of forced alignment for automatic acoustic-phonetic segmentation of oral discourse produced by Cantonese speakers with aphasia was first reported by Lee et al. (2012). Specifically, using the HTK (Hidden Markov Model Toolkit), alignment and segmentation of initial consonants and rime of syllables in samples of read speech and spontaneous oral production was conducted automatically. This method of acoustic sample processing allowed subsequent measurement of various acoustic parameters of the speech samples. This study aims to investigate the statistical variation of speech duration in Cantonese oral discourse by speakers with aphasia. It is focused on the duration of continuous speech chunks and the duration ratio of speech chunk and inter-chunk pauses. The observations on aphasic speech are compared with those of normal speech.
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