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. 2007 May-Jun;73(3):359-69.
doi: 10.1016/s1808-8694(15)30080-x.

Study of the hearing in children born from pregnant women exposed to occupational noise: assessment by distortion product otoacoustic emissions

Eduardo Bezerra Rocha  1 , Marisa Frasson de Azevedo, João Aragão Ximenes Filho
Affiliations

Study of the hearing in children born from pregnant women exposed to occupational noise: assessment by distortion product otoacoustic emissions

Eduardo Bezerra Rocha et al. Braz J Otorhinolaryngol. 2007 May-Jun.

Abstract

Aim: To detect early on a probable hearing loss in children of women exposed to occupational noise during their pregnancy and to verify if there is any difference between the children from those women exposed to occupational noise during their pregnancy and the ones from mothers that do not work under the same conditions.

Methods: Children from women exposed to occupational noise during their pregnancy and children from women who were not exposed were evaluated through distortion product otoacoustic emissions, using the GSI 60 DPOEA SYSTEM equipment and the frequency-ratio F2/F1 equal to 1.2 and the geometric average of 2F1-F2. The intensity of the primary frequencies were kept steady with values of L1=65dBSPL and L2=55dBSPL for F1 and F2, respectively. Student T test in paired samples and independent samples were used.

Results: There were no differences in the response amplitude of distortion product otoacoustic emissions between the control and the study groups. There was no statistically difference between male and female children in response amplitude for the two groups aforementioned; and there were no differences between right and left ears from each group.

Conclusion: We did not observe hearing impairment in children whose mothers were exposed to occupational noise during pregnancy when compared to the children from mothers who were not. There was no difference between the right and left ears, nor between male and female children in each group.

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References

    1. Silveira JAM, Brandão ALA, De Rossi J, Ferreira LLA, Name MAM, Estefan P, Gonçalez F. Avaliação da alteração auditiva provocada pelo uso do walkman, por meio da audiometria tonal e das emissões otoacústicas (produtos de distorção): estudo de 40 orelhas. Rev Bras Otorrinolaringol. 2001;65(5):650–654.
    1. Probst R, Lonsbury-Martin BL, Martin GK, Coats AC. Otoacoustic emissions in ears with hearing loss. Am J Otolaryngol. 1987;8:73–81. - PubMed
    1. Harris FP, Lonsbury-Martin BL, Stagner BB, Coats AC, Martin GK. Acoustic distortion products in humans: systematic changes in amplitudes as a function of f2/f1 ratio. J Acoust Soc Am. 1989;85(1):220–229. - PubMed
    1. Gattaz G, Wazen SRG. O registro das emissões otoacústicas evocadas - produto de distorção em pacientes com perda auditiva induzida pelo ruído. Rev Bras Otorrinolaringol. 2001;67(2):213–218.
    1. Kemp DT, Ryan S. Otoacoustic emission tests in neonatal screening programmes. Acta Otolaryngol (Stockh) 1991;482:73–84. - PubMed

Uncited Reference

    1. Martin GK, Ohlms LA, Franklin DJ, Harris FP, Lonsbury-Martin BL. Distortion product emissions in human. Influence of sensorineural hearing loss. Ann Otol Rhinol Laryngol Suppl. 1990;147:30–42. - PubMed
    1. Fukuda C, Munhoz MSL, Toledo FB, Hassan SE. Emissões otoacústicas por produto de distorção em trabalhadores expostos a ruído. Acta AWHO. 1998;17(4):176–185.
    1. Garcia AP, Snege YC, Azevedo MF, Soares E. Emissões otoacústicas evocadas transientes e emissões otoacústicas evocadas por produto de distorção em adultos normais: estudo dos desvios transitórios do limiar de audibilidade após exposição ao ruído. Pró-Fono Revista de Atualização Científica. 1999;11(2):53–60.
    1. Kimberley BP. Applications of distortion-product emissions to an otological practice. Laryngoscope. 1999;109(12):1908–1918. - PubMed
    1. Ferreira LLA, Silveira JAM, Percebo CC, Gonçalez F. Perda auditiva induzida por ruído: análise dos achados de audiometria tonal, potenciais evocados do tronco cerebral e emissões otoacústicas evocadas por produto de distorção. Rev Bras Otorrinolaringol. 2001;67(1):9–14.