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https://codas.org.br/article/doi/10.1590/2317-1782/e20250421pt
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Original Article

Análise da codificação neural de fala em condições mono e binaural em crianças com transtorno dos sons da fala

Analysis of neural coding of speech in monaural and binaural conditions in children with speech sound disorder

Marciana da Costa Carlos; Thaís Nobre Uchôa Souza; Ranilde Cristiane Cavalcante Costa; Aline Tenório Lins Carnaúba

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Resumo

Objetivo: Analisar se crianças com transtorno fonológico apresentam alterações na codificação neural da fala, por meio do Frequency Following Response (FFR), nas condições monoaural e binaural. Método: Estudo analítico, observacional e transversal, com amostra de 21 crianças com Transtorno Fonológico e 21 com desenvolvimento típico. Os indivíduos foram submetidos aos seguintes procedimentos: anamnese, avaliação fonológica, inspeção do meato acústico externo, avaliação audiológica e eletrofisiológica, realizados em uma ou duas sessões. O FFR foi realizado com estímulo de fala /da/, em duas varreduras de 3000 estímulos de 80 dB NA, com taxa de 10,9 estímulos/segundo, duração de 40 ms e janela de análise de 74,677 ms. Resultados: As crianças com Transtorno Fonológico apresentaram maiores valores de latência em todas condições em comparação com o Desenvolvimento Típico, com significância estatística na latência da onda V e amplitudes menores em relação às com desenvolvimento típico, porém sem significância estatística. Na forma de apresentação do estímulo, a condição binaural apresentou amplitudes significativamente maiores em relação às monoaurais, sugerindo a presença de um efeito de somação binaural. Conclusão: As crianças com transtorno fonológico apresentam alterações na codificação da fala, evidenciadas pelo atraso nas respostas do FFR nas condições monoaural e binaural.

Palavras-chave

Potencial Evocado Auditivo; Transtorno Fonológico; Crianças; Fala; Eletrofisiologia

Abstract

Purpose: To analyze whether children with phonological disorder present alterations in the neural coding of speech, using Frequency Following Response (FFR) under monaural and binaural conditions. Methods: This is an analytical, observational, cross-sectional study with a sample of 21 children with phonological disorders and 21 with typical development. They underwent the following procedures: medical history survey, phonological assessment, inspection of the external auditory canal, and audiological and electrophysiological evaluation, performed in one or two sessions. FFR was performed with the speech stimulus /da/, in two sweeps of 3000 stimuli at 80 dB HL, with a rate of 10.9 stimuli/second, a duration of 40 ms, and an analysis window of 74.677 ms. Results: Children with phonological disorders presented higher latency values in all conditions than those with typical development, with statistical significance in the latency of wave V, and lower amplitudes than those with typical development, although without statistical significance. In terms of stimulus presentation, the binaural condition showed significantly larger amplitudes than the monaural conditions, suggesting the presence of a binaural summation effect. Conclusion: Children with phonological disorders present alterations in speech encoding, evidenced by delays in FFR responses under both monaural and binaural conditions

Keywords

Auditory Evoked Potential; Phonological Disorder; Children; Speech; Electrophysiology

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Submitted date:
12/02/2025

Accepted date:
02/18/2026

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