Phonological contrasts and gradient effects in ongoing lenition in the Spanish of Gran Canaria

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Abstract
This study explores ongoing lenition of postvocalic /p t k b d g/ in the Spanish of Gran Canaria. Duration, intensity and harmonics-to-noise ratio of 16,454 sounds produced by 44 native speakers were measured, with the latter phonetic parameter used for the first time to investigate lenition. The results show a path of gradual sound shortening and opening from voiceless stops to open approximants, as well as systematic use of six different variants depending on the underlying representation and phonological context: two types of [p t k], two types of [b d g] and two types of [β˕ ð˕ ɣ˕]. We interpret this as continuity lenition that leads to the flattening of the intensity contour and harmonicity of the target segment with respect to the flanking sounds. We argue that a phonological analysis of this process that accounts for its non-neutralising character requires the use of a scalar [aperture] feature.

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