Acoustic parameters of the voicing contrast of plosives in typical phonological development and phonological disorder

Revista da Sociedade Brasileira de Fonoaudiologia

Arzeno, Leonardo¹  Mota, Helena Bolli¹  Universidade Federal de Santa Maria, Santa Maria, Brasil¹  Melo, Roberta Michelon¹  Lovatto, Liane¹  Mezzomo, Carolina Lisbôa¹  Brasil, Brunah de Castro¹ 

关键词: Speech acoustics;    Child;    Speech disorders;    Sound spectrography;    Speech;    Child language;   

DOI  :  10.1590/S1516-80342012000300012

来源: Sociedade Brasileira de Fonoaudiologia

【 摘 要 】

PURPOSE: To investigate if children with phonological disorder present different acoustic characteristics of voiceless and voiced plosives from children with typical phonological development.METHODS: Participants were 11 children with typical phonological development and five children with phonological disorder and difficulty to establish the distinctive feature [+voice] of plosives. Through words (['papa], ['baba], ['tata], ['dada], ['kaka] and ['gaga]) inserted into carrier phrases, we measured voice onset time, vowel length, burst amplitude, and occlusion length of each plosive. The acoustic parameters of voiceless and voiced plosives were compared between and within groups through statistical analysis.RESULTS: The subjects within typical phonological development presented significant results mainly in distinguishing the parameters voice onset time, vowel length, and occlusion of voiceless and voiced stops, which was different from what was observed for children with phonological disorder. The comparison between groups showed differences related to the production of voice onset time and the occlusion length of voiced plosives. Regarding the other analyzed parameters, the values were similar between groups, with no statistical differences.CONCLUSION: The marking of the voicing contrast of the group with phonological disorder is different from the group with typical phonological development, especially regarding the voice onset time and the occlusion length of the voiced segments.

【 授权许可】

Unknown