Distortion-product otoacoustic emissions: body position effects with simultaneous presentation of tone pairs

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Samuel R. Atcherson *
Amy Mattheis
(*) Corresponding Author:
Samuel R. Atcherson | sratcherson@ualr.edu


This study examined the effect of three different body positions on distortion-product otoacoustic emission (DPOAE) amplitude and noise levels with multiple primary tone pairs simultaneously-presented to 36 normal-hearing female human adults. Other studies have demonstrated that the simultaneously presented tone pairs method shows clinical promise as a screener, but the sequential method remains in widespread clinical use. Postural changes have been suggested to have an effect not only on DPOAEs, but also transient-evoked OAEs and stimulus- frequency OAEs. DPOAE amplitude and noise levels were recorded in seated, supine, and side-lying positions to the following order of simultaneously-presented tone pairs relative to the f2 frequencies: 1187, 2375, and 4812 Hz; 1500, 3000, and 6062 Hz; and 1875, 3812, and 7625 Hz. No DPOAE could be detected reliably at 7625 Hz as result of poor signal-to-noise ratio. For remaining DPOAEs, statistical analyses revealed that amplitudes were not significantly different among the three body positions. However, at 1500 Hz and below, body position did have a statistically significant effect on noise levels though they are likely clinically negligible. Except at 7625 Hz, results suggest that DPOAEs recorded using a simultaneously presented tone pairs appear to be comparably recorded regardless of an individual’s body position.

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Author Biographies

Samuel R. Atcherson, Department of Audiology and Speech Pathology, University of Arkansas at Little Rock, University of Arkansas for Medical Sciences, Little Rock, Arkansas

Department of Audiology and Speech Pathology, Assistant Professor of Audiology, Director of the Auditory Electrophysiology and Rehabilitation Laboratory, Ph.D. from the University of Memphis

Amy Mattheis, Department of Communication Disorders, University of South Dakota, Vermillion, South Dakota

Clinical Audiologist, Au.D. from the University of South Dakota