15th International Congress of Phonetic Sciences (ICPhS-15)
Duration and devoicing of Portuguese fricatives have been studied using a set of corpora that include nonsense words following Portuguese phonological rules, and real words; these were recorded by four subjects (2 male, 2 female). Results show that fricative duration varies most with voicing (voiceless are longer), and also significantly by speaker, place, and position within word. Devoicing occurs most often word-finally, and varies significantly by place; devoicing occurs more often than in English.
Bibliographic reference. Jesus, Luis M. T. / Shadley, Christine H. (2003): "Temporal and devoicing analysis of European Portuguese fricatives", In ICPhS-15, 779-782.