O estudo dos níveis de discriminação auditiva por meio dos potenciais evocados auditivos corticais com estímulos de fala

Abstract

The examination of cortical auditory evoked potentials is used to characterize the auditory processing, from different stimuli, which can be elicited by pure tone or speech. Speech sounds are composed of different distinctive features that are defined as acoustic-articulatory characteristics capable of marking the difference between phonemes. Speech sound disorders, a condition often observed during child development, may be related to difficulties in processing auditory information. In view of this, the present research was divided into three stages: (1) Carrying out a systematic review with meta-analysis on the long latency auditory evoked potentials in children with speech disorders, finding that there is no difference in latency of N1- P2- N2 of these children, when compared with children with typical speech development; (2) Definition of speech stimuli considering the distinctive features to perform the examination of cortical auditory evoked potentials in adults and children with normal hearing and speech, with the aim of identifying levels of auditory discrimination. The study concluded that it was not possible to identify the existence of auditory discrimination levels with cortical auditory evoked potentials, from the speech stimuli tested; (3) Development of a speech screening application with the aim of early identification of children with phonological disorders. A usability test was performed with the System Usability Scale. The analysis of the application showed a percentage of 96.25% usability