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Forma de estudo: clínico prospectivo randomizado. Material e método: no presente trabalho foram registradas respostas das curvas de crescimento nas freqüências de 1000, 2000, 4000 e 5000 Hertz com estímulo sonoro de 45 a 70 dB NPS em passos de 5 dB por ponto, sendo a proporção F2/F1 igual a 1.22. Foram avaliados 16 indivíduos audiologicamente normais (limiar < ou =20dB Na) na faixa etária de 18 a 25 anos. O equipamento utilizado para o teste foi o ILO 92 OTODYNAMIC Ltd. As respostas foram consideradas presentes quando se encontravam 3dB acima do ruído de fundo. Resultado: Não houve diferença estatisticamente significante com relação a idade, sexo e orelha direita/esquerda. A ocorrência das EOAPD foi de 100% nas freqüências de 2000, 4000, e 5000 Hertz e 84,37% na freqüência de 1000 Hertz quando a cóclea foi estimulada a 70 dB NPS. Conclusão: As curvas de crescimento apresentaram inclinação de aspecto linear sem "plateau", já o ruído de fundo manteve-se constante, apresentando pequena ascensão a partir do estímulo de 55 dB NPS. Study design: clinical prospective randomized. Material and method: at the present work it was registered answers of the growth rates at frequencies of 1,000, 2,000, 4,000 and 5,000 Hertz with sound stimulus of 45 to 70 dB SPL in beats of 5 dB per point, being the F2/F1 rate equals to 1.22. Sixteen normally hearing "perfect" people between 18 to 25 years old were evaluated. The equipment used for the test was the ILO 92 OTODYNAMIC Inc. The answers were considered present when 3 dB above the back noise was registered. Result: There was no statistics significant difference in relation to age, sex and right ear and left ear. The DPOAE occurrence was of 100% at the frequencies of 2,000, 4,000 and 5,000 Hertz and of 84.37% at the 1,000-Hertz frequency when the cochlea was stimulated at 70 dB SPL. Conclusion: The growth rates showed a linear aspect inclination without plateau, although the back noise kept itself constant, showing a slight increase from the 55-dB SPL stimulus

revista brasileira de otorrinolaringologia

Estudo do padrão de respostas das curvas de crescimento (dp growth rate) das emissões otoacústicas produto de distorção em indivíduos com audição normal