The Variable Pronunciations of Word-final Consonant Clusters in a Force Aligned Corpus of Spoken French

Abstract

This thesis project examined both schwa insertion and simplification following word-final consonant clusters in a large corpus of spoken French. Two main research questions were addressed. Can a system of forced alignment reliably reproduce pronunciation judgements that closely match those of a human researcher? How do variables, such as speech style, following context, motivation for simplification and speech rate, affect the variable pronunciations of word-final consonant clusters? This project describes the creation and testing of a novel system of forced alignment capable of segmenting recorded French speech. The results of comparing the pronunciation judgements between automatic and manual methods of recognition suggest that a system of forced alignment using speaker adapted acoustic models performed better than other acoustic models; produced results that are likely to be similar to the results produced by manual identification; and that the results of forced alignment are not likely to be affected by changes in speech style or speech rate. This project also described the application of forced alignment on a corpus of natural language spoken French. The results presented in this large sample corpus analysis suggest that the dialectal differences between Québec and France are not as simple as ``simplification in Québec, schwa insertion in France". While the results presented here suggest that the process of simplification following a word-final consonant cluster is similar in both dialects, the process of schwa insertion is likely to be different in each dialect. In both dialects, word-final consonant cluster simplification is more frequent in a preconsonantal context; is most likely in a spontaneous or less formal speech style and in that speech style is positively associated with higher speaking rates. Schwa insertion following a word-final consonant cluster displays much stronger dialectal differences. Schwa insertion in the dialect from France is strongly affected by following context and possibly speech style. Schwa insertion in the dialect from Québec is not affected by following context and is strongly predicted by a lack of consonant cluster simplification.