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Duration differences in the articulation and acoustics of Swiss German word-initial geminate and singleton stops.

Stops in Swiss German contrast only in quantity in all word positions; aspiration and voicing play no role. As in most languages with consonant quantity contrast, geminate stops are produced with significantly longer closure duration (CD) than singletons in an intersonorant context. This holds word medially as well as phrase medially, e.g., [oni tto:s] "without roar" versus [oni to:s] "without can." Since the stops are voiceless, no CD cue distinguishes geminates from singletons phrase initially. Nevertheless, do speakers utilize articulatory means to maintain the contrast? By using electropalatography, the articulatory and acoustic properties of word-initial alveolar stops were investigated in phrase-initial and phrase-medial contexts. The results are threefold. First, as expected, CD and contact duration of the articulators mirror each other within a phrase: Geminates are longer than singletons. Second, phrase initially, the contact data unequivocally establish a quantity distinction. This means that-even without acoustic CD cues for perception-geminates are articulated with substantially longer oral closure than singletons. Third, stops are longer in phrase-initial than phrase-medial position, indicating articulatory strengthening. Nevertheless, the difference between geminates and singletons phrase initially is proportionately less than in phrase-medial position.