Coarticulation in sequences of two nonhomorganic stop consonants: Perceptual and acoustic evidence

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Abstract
Whether any perceptually useful coarticulatory information is carried by the release burst of the first of 2 successive, nonhomorganic stop consonants was investigated (in humans). The CV [consonant-vowel] portions of natural VCCV utterances were replaced with matched synthetic stimuli from a continuum spanning the 3 places of stop articulation. There was a sizable effect of coarticulatory cues in the natural-speech portion on the perception of the 2nd stop consonant. When the natural VC portions including the final release burst were presented in isolation, listeners were significantly better than chance at guessing the identity of the following, missing syllable-initial stop. The hypothesis that the release burst of a syllable-final stop contains significant coarticulatory information about the place of articulation of a following, nonhomorganic stop was further confirmed in acoustic analyses which revealed significant effects of CV context on the spectral properties of the release bursts. The relationship between acoustic stimulus properties and listener''s perceptual responses was not straightforward.

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