Distortion-Product Otoacoustic Emissions in Schoolchildren: Effects of Ear Asymmetry, Handedness, and Gender

Tegan Keogh; Joseph Kei; Carlie Driscoll; Veronica Smyth

doi:10.1055/s-0042-1745641

Journal of the American Academy of Audiology, Inhaltsverzeichnis

J Am Acad Audiol 2001; 12(10): 506-513
DOI: 10.1055/s-0042-1745641

Original Article

Distortion-Product Otoacoustic Emissions in Schoolchildren: Effects of Ear Asymmetry, Handedness, and Gender

Tegan Keogh

Department of Speech Pathology and Audiology, The University of Queensland, St. Lucia, Queensland, Australia

,

Joseph Kei

Department of Speech Pathology and Audiology, The University of Queensland, St. Lucia, Queensland, Australia

,

Carlie Driscoll

Department of Speech Pathology and Audiology, The University of Queensland, St. Lucia, Queensland, Australia

,

Veronica Smyth

Department of Speech Pathology and Audiology, The University of Queensland, St. Lucia, Queensland, Australia

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Abstract

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Abstract

The present study examined effects of ear asymmetry, handedness, and gender on distortionproduct otoacoustic emissions (DPOAEs) obtained from schoolchildren. A total of 1003 children (528 boys and 475 girls), with a mean age of 6.2 years (SD = 0.4, range = 5.2–7.9 years), were tested in a quiet room at their schools using the GSI-60 DPOAE system. A distortion-product (DP)-gram was obtained for each ear, with f2 varying from 1.1 to 6.0 kHz and the ratio of f2/f 1 at 1.21. The signal-to-noise ratios (SNRs) (DPOAE amplitude minus the mean noise floor) at the tested frequencies 1.1,1.5, 1.9, 2.4, 3.0, 3.8, 4.8, and 6.0 kHz were measured. The results revealed a small but significant difference in SNR between ears, with right ears showing a higher mean SNR than left ears at 1.9, 3.0, 3.8, and 6.0 kHz. At these frequencies, the difference in mean SNR between ears was less than 1 dB. A significant gender effect was also found. Girls exhibited a higher SNR than boys at 3.8, 4.8, and 6.0 kHz. The difference in mean SNR, as a result of the gender effect, was about 1 to 2 dB at these frequencies. There was no significant difference in mean SNR between left-handed and right-handed children for all tested frequencies.

Abbreviations: DPOAE = distortion-product otoacoustic emission, OAE = otoacoustic emission, SNR = signal-to-noise ratio, SOAE = spontaneous otoacoustic emission, TEOAE = transient evoked otoacoustic emission

Keywords

Children - distortion-product otoacoustic emissions - ear asymmetry - gender - handedness - hearing screening

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Referenzen

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