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J Am Acad Audiol 2001; 12(08): 397-405
DOI: 10.1055/s-0042-1745626
Original Article

Similarities and Differences in Distortion-Product Otoacoustic Emissions Among Four FDA-Approved Devices

Teralandur K. Parthasarathy
Department of Special Education and Communication Disorders, Southern Illinois University at Edwardsville, Edwardsville. Illinois
,
Barbara Klostermann
Department of Special Education and Communication Disorders, Southern Illinois University at Edwardsville, Edwardsville. Illinois
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Abstract

Similarities and differences in distortion-product otoacoustic emissions (DPOAEs) among four Food and Drug Administration (FDA) approved devices were assessed quantitatively. DPOAEs were recorded from 42 adult subjects (84 ears) ranging in age from 19 to 40 years. All subjects had hearing thresholds of 20 dB HL or better for the test frequencies from 0.25 to 8.0 kHz and normal acoustic immittance findings. DPOAEs were collected in a quiet non-sound-treated room. DPOAE measurement parameters included an f2/f1 ratio of ~1.2, with f1 at 65 dB SPL (L1) and f2 at 55 dB SPL (L2). There were no significant differences in the mean emissions levels among the four devices. This investigation showed that validity criteria, pass criteria, and strategies for DPOAE measurements interact to produce varying pass and refer results. However, when DPOAEs are obtained with consistent validity criteria, pass criteria, and strategies for measurement, the results are remarkably consistent.

Abbreviations: ANOVA = analysis of variance, CNS = central nervous system, DPOAEs = distortion-product otoacoustic emissions, FDA = Food and Drug Administration, L = level, OAEs = otoacoustic emissions, SNR = signal-to-noise ratio

Keywords

Distortion-product otoacoustic emissions - otoacoustic emissions - outer hair cells - signal-to-noise ratio - universal hearing screening


Publication History

Article published online:
04 March 2022

© 2001. American Academy of Audiology. This article is published by Thieme.

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