Late auditory evoked potentials to speech stimuli presented with different transducers in hearing children/Potencial evocado auditivo de longa latencia para estimulo de fala apresentado com diferentes transdutores em criancas ouvintes

Purpose: to analyze, in a comparative manner, the influence of the transducer on the recordings of [P.sub.1], [N.sub.1] and [P.sub.2] components elicited through speech stimulus, as to the latency and amplitude in hearing children. Method: the sample was comprised of 30 hearing children aged 4-12 yrs, both genders. The long latency auditory evoked potentials were researched by means of transducers, insertion phone and speakers, elicited through speech stimulus /da/ presented with interstimuli interval of 526ms, the intensity of 70dBNA and presentation rate of 1.9 stimuli per second. Whenever present, [P.sub.1], [N.sub.1] and [P.sub.2] components were analyzed as to latency and amplitude. Results: it was found a strong level of agreement between the researcher and the judge. There was no statistically significant difference when comparing the values of latency and amplitude of the [P.sub.1], [N.sub.1] and [P.sub.2] components, when considering gender and ear, as well as the latency of components when considering the types of transducers. However, there was a statistically significant difference for the amplitude of the [P.sub.1] and [N.sub.1] components with greater amplitude for the speaker transducer. Conclusion: the latency values of the [P.sub.1], [N.sub.1] and [P.sub.2] components and [P.sub.2] amplitude obtained with insertion phone may be used as normal reference independent of the transducer used for the recording of auditory evoked potentials of long latency. KEYWORDS: Evoked Auditory Potentials; Transducers; Child Objetivo: analisar, de forma comparativa, a influencia do transdutor no registro dos componentes [P.sub.1], [N.sub.1] e [P.sub.2] eliciados por estimulo de fala, quanto a latencia e a amplitude, em criancas ouvintes. Metodo: 30 criancas ouvintes de quatro a 12 anos de idade, de ambos os sexos. Os potenciais evocados auditivos de longa latencia foram pesquisados por meio dos transdutores, fone de insercao e caixa acustica, eliciados por estimulo de fala /da/, sendo o intervalo interestimulos de 526ms, a intensidade de 70dBNA e a taxa de apresentacao de 1,9 estimulos por segundo. Foram analisados os componentes [P.sub.1], [N.sub.1] e [P.sub.2] quando presentes, quanto a latencia e a amplitude. Resultados: constatou-se um nivel de concordancia forte entre a pesquisadora e o juiz. Nao houve diferenca estatisticamente significante ao comparar os valores de latencia e amplitude dos componentes [P.sub.1], [N.sub.1] e [P.sub.2], ao considerar se