OBJECTIVE:To determine the effects of a formal auditory training program on the behavioral, electrophysiological and subjective aspects of auditory function in individuals with bilateral high-frequency hearing loss.METHOD:A prospective study of seven individuals aged 46 to 57 years with symmetric, moderate high-frequency hearing loss ranging from 3 to 8 kHz was conducted. Evaluations of auditory processing (sound location, verbal and non-verbal sequential memory tests, the speech-in-noise test, the staggered spondaic word test, synthetic sentence identification with competitive ipsilateral and contralateral competitive messages, random gap detection and the standard duration test), auditory brainstem response and long-latency potentials and the administration of the Abbreviated Profile of Hearing Aid Benefit questionnaire were performed in a sound booth before and immediately after formal auditory training.RESULTS:All of the participants demonstrated abnormal pre-training long-latency characteristics (abnormal latency or absence of the P3 component) and these abnormal characteristics were maintained in six of the seven individuals at the post-training evaluation. No significant differences were found between ears in the quantitative analysis of auditory brainstem responses or long-latency potentials. However, the subjects demonstrated improvements on all behavioral tests. For the questionnaire, the difference on the background noise subscale achieved statistical significance.CONCLUSION:Auditory training in adults with high-frequency hearing loss led to improvements in figure-background hearing skills for verbal sounds, temporal ordination and resolution, and communication in noisy environments. Electrophysiological changes were also observed because, after the training, some long latency components that were absent pre-training were observed during the re-evaluation.
OBJETIVO: verificar o desempenho de indivíduos pós-traumatismo cranioencefálico em testes comportamentais para avaliação do processamento auditivo. MÉTODO: participaram da pesquisa 10 indivíduos audiologicamente normais com histórico de trauma craniano. Foram submetidos a: audiometria tonal liminar, logoaudiometria, medidas de imitância acústica (timpanometria e pesquisa dos reflexos acústicos) e avaliação comportamental do processamento auditivo (Testes de Localização Sonora, Memória Sequencial Verbal, Memória Sequencial Não Verbal, Padrão de Duração, Dicótico Consoante-Vogal, Dicótico de Dissílabos Alternados, Identificação de Sentenças Sintéticas com mensagem competitiva, Identificação de Intervalo Aleatório, Índice Percentual de Reconhecimento de Fala com gravação, Fala com Ruído Branco). RESULTADOS: o teste de Padrão de Duração indicou o teste com o maior número de alteração (60%). O teste com a média mais satisfatória foi o Índice Percentual de Reconhecimento de Fala com gravação (93%) e a média menos satisfatória relacionou-se ao teste Dicótico Consoante-Vogal, com 40,56%. As inversões (70%) representaram a tendência de erros no Dicótico de Dissílabos Alternados mais frequente. O processo gnósico do tipo decodificação foi o mais predominante (100%), seguido da organização (90%), não verbal (60%), codificação-perda gradual de memória (20%). Não houve alteração no processo gnósico de codificação-integração. CONCLUSÃO: os indivíduos pós-traumatismo cranioencefálico apresentam transtorno do processamento auditivo de diferentes graus, envolvendo os processos gnósicos de decodificação e organização.
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