Duration of syllable nuclei in Spanish

Abstract In many languages, vowel duration is modulated by syllable structure — a phenomenon known as vowel compression — so that vowels are shorter in syllables with more segments than in syllables with fewer segments. Most instrumental evidence to date has reported an effect, in many languages, of the presence (and complexity) of a coda, and some studies have also documented effects of the presence (and complexity) of an onset. However, no prior studies on Spanish vowel duration have captured any effects of syllable structure. Using data from nine speakers and controlled speech materials, the present study addresses the following research question: Does syllable structure modulate vowel duration? The findings are as follows: (a) Relative to simplex onsets (those with a singleton consonant), complex onsets (those with a consonant cluster) trigger vowel compression; and (b) neither simplex nor complex codas consistently drive vowel compression — i.e. codas do not systematically affect vowel duration. Together with the facts for other languages, our findings support a view according to which syllable structure — in particular, onset complexity — modulates acoustic vowel duration. The study discusses the theoretical implications of this finding, which are argued to be in line with some of the principles of the Articulatory Phonology framework or, alternatively, suggest that codas should not be considered part of the articulatory syllable.