Abstract
Previous work has suggested that the degree or extent of coarticulation is more extreme in young children than adults. Research in this area has focused primarily on supralaryngeal aspects of coarticulation, using spectral measures such as formant frequencies and fricative centroids. At the same time, studies of adults have found that laryngeal adjustments for voiceless consonants extend well into neighboring vowels, yielding higher values of open quotient and DC flow, and more symmetical pulse shapes, in vowels flanking voiceless as compared to voiced consonants. The current work investigates laryngeal coarticulation in normally developing, English-speaking 4- and 5-year olds. Inverse filtering of the oral airflow is used to approximate the glottal source signal in utterances containing /VpV, VhV, VbV/ sequences. The /VbV/ utterance, which does not require vocal-fold abduction, serves as a control condition to the voiceless consonants. Voice source (open quotient, speed quotient) and aerodynamic (AC and DC flow) quantities are measured over time, and compared between the children and adult females. Along with adding to our understanding of developmental changes in coarticulation, these data will contribute to the literature on differences in voice source properties between children and adults. [Work supported by NIH.]
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