14th International Congress of Phonetic Sciences (ICPhS-14)

San Francisco, CA, USA
August 1-7, 1999

Contextual Influences on Stop Consonant Articulatory Postures in Connected Speech

James Dembowski (1), John R. Westbury (2)

(1) State University of New York at New Paltz, NY, USA
(2) University of Wisconsin-Madison, WI, USA

Phonetic contexts are assumed to produce consistent allophonic variations in articulatory posture across speakers within a language. However, recent studies of multiple talkers producing connected speech have suggested that contextual influences on articulatory posture may be more varied and less predictable than commonly assumed. This study examined contextual variability in articulatory postures for bilabial, alveolar, and velar stop consonants, at the releases of all stops in 37 English sentences, produced by 12 normal young adults. Data included 557 tokens for each speaker, distributed across 190 phonetic contexts. Cluster analysis was used to find postural similarities among context conditioned phones (within place categories), and then phonetic contexts were examined to see if and how they reflected postural similarities. Results showed logical phonetic associations among contextually conditioned phones, but not the same associations from one speaker to another. Across speakers, liquids and fricatives appeared to affect stop posture more than vowels.

Full Paper

Bibliographic reference.  Dembowski, James / Westbury, John R. (1999): "Contextual influences on stop consonant articulatory postures in connected speech", In ICPhS-14, 2419-2422.