15th International Congress of Phonetic Sciences (ICPhS-15)

Barcelona, Spain
August 3-9, 2003

Prosody-Induced Acoustic Variation in English Stop Consonants

Hansook Choi

University of Illinois at Urbana-Champaign, USA

This work compares the acoustic patterns of English stop consonants (here /p/ vs. /b/) in three distinct prosodic contexts: accented position, domain-initial position, and domain-final position. Target consonants are analyzed from utterance (U) or Intonational Phrase (IP)-initial position, U/IP-final position, and U/IP-medial position, with and without contrastive focal accent. VOT and F0 at the onset of the following vowel are measured as the main acoustic correlates of voicing in English from the speech of six male American English speakers. The statistical results indicate that the accentual effect is greater and more consistent than the boundary effect on acoustic patterns. The distribution of acoustic measures also shows a greater distinction between the two contrastive stops when accented. Positional variation is not very distinctive, and the enhanced contrast marking in domain-initial position predicted from articulatory studies is not observed in the present setting.

Full Paper

Bibliographic reference.  Choi, Hansook (2003): "Prosody-induced acoustic variation in English stop consonants", In ICPhS-15, 2661-2664.