Covert contrast in velar fronting: An acoustic and ultrasound study.

This study used an ultrasound measure (Dorsum Excursion Index) and acoustic measures (VOT and spectral moments of the burst) to investigate overt and covert contrast between velar and alveolar stops in child speech. Participants were two children who produced a perceptually overt velar-alveolar contrast and two children who neutralised the contrast via velar fronting. Both acoustic and ultrasound measures revealed significant differences between perceptually distinct velar and alveolar targets. One child with velar fronting demonstrated covert contrast in one acoustic and one ultrasound measure; the other showed no evidence of contrast. Clinical implications are discussed in this article. PMID: 26325303 [PubMed - as supplied by publisher]
Source: Clinical Linguistics and Phonetics - Category: Speech Therapy Authors: Tags: Clin Linguist Phon Source Type: research