In English, phonologically voiced consonants are often phonetically voiceless in utterance-initial position. Other than Westbury (1983), there is little articulatory evidence regarding utterance-initial voicing in American English. The current study uses ultrasound imaging and acoustic measures to examine how tongue position correlates with phonation in American English, comparing phonated voiced stops, unphonated voiced stops, and voiceless stops in utterance-initial position. Eight speakers of American English recorded voiced/voiceless stops at three places of articulation (labial, alveolar, and velar), in three different environments (utterance-initial, post-nasal, and post-fricative), and with two different following vowels (high/low). One adjustment for initiating or maintaining phonation during the closure is enlarging the supraglottal cavity volume primarily via tongue root advancement. In utterance-initial position, there was a clear distinction between voiced stops and voiceless stops in the tongue root for the alveolar and velar places of articulation. Even without acoustic phonation during closure, the tongue root is advanced for voiced stops in comparison to voiceless stops for supraglottal cavity enlargement. These results suggest that speakers have the same target for both phonated and unphonated stops in utterance-initial position (i.e., shorter VOT), but other articulatory adjustments are responsible for the presence or absence of phonation.
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September 2015
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September 01 2015
Utterance-initial voiced stops in American English: An ultrasound study
Suzy Ahn
Suzy Ahn
Dept. of Linguist., New York Univ., 10 Washington Pl., New York, NY 10003, [email protected]
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J. Acoust. Soc. Am. 138, 1777 (2015)
Citation
Suzy Ahn; Utterance-initial voiced stops in American English: An ultrasound study. J. Acoust. Soc. Am. 1 September 2015; 138 (3_Supplement): 1777. https://doi.org/10.1121/1.4933625
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