Journal of Rehabilitation Research & Development (JRRD)

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Volume 49 Number 7, 2012
   Pages 1005 — 1024

Abstract — Performance on tests of central auditory processing by individuals exposed to high-intensity blasts

Frederick J. Gallun, PhD;1-2* Anna C. Diedesch, AuD;1 Lina R. Kubli, MS;3 Therese C. Walden, AuD;3 Robert L. Folmer, PhD;1-2 M. Samantha Lewis, PhD;1-2 Daniel J. McDermott, MS;1 Stephen A. Fausti, PhD;1-2 Marjorie R. Leek, PhD1-2

1National Center for Rehabilitative Auditory Research (NCRAR), Portland Department of Veterans Affairs Medical Center, Portland, OR; 2Oregon Health & Science University, Portland, OR; 3Audiology and Speech Center, Scientific and Clinical Studies Section, Walter Reed National Military Medical Center, Bethesda, MD

Abstract — Thirty-six blast-exposed patients and twenty-nine non-blast-exposed control subjects were tested on a battery of behavioral and electrophysiological tests that have been shown to be sensitive to central auditory processing deficits. Abnormal performance among the blast-exposed patients was assessed with reference to normative values established as the mean performance on each test by the control subjects plus or minus two standard deviations. Blast-exposed patients performed abnormally at rates significantly above that which would occur by chance on three of the behavioral tests of central auditory processing: the Gaps-In-Noise, Masking Level Difference, and Staggered Spondaic Words tests. The proportion of blast-exposed patients performing abnormally on a speech-in-noise test (Quick Speech-In-Noise) was also significantly above that expected by chance. These results suggest that, for some patients, blast exposure may lead to difficulties with hearing in complex auditory environments, even when peripheral hearing sensitivity is near normal limits.

Keywords: audiometric evaluation, auditory dysfunction, auditory processing disorder, blast, central auditory processing, evoked potential, hearing loss, rehabilitation, traumatic brain injury, Veterans.

View HTML  ¦  View PDF  ¦  Contents Vol. 47, No. 9

This article and any supplemental material should be cited as follows:
Gallun FJ, Diedesch AC, Kubli LR, Walden TC, Folmer RL, Lewis MS, McDermott DJ, Fausti SA, Leek MR. Performance on tests of central auditory processing by individuals exposed to high-intensity blasts. J Rehabil Res Dev. 2012;49(7):1005-24.

ResearcherID: Frederick J. Gallun, PhD: G-3792-2012


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