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HESP Seminar: Ken Grant (Walter Reed)
Title: Hidden Hearing Loss and Assessment of Functional-Hearing Deficits in Active-Duty Service Members
Abstract: Exposure to sub-concussive explosive blasts can give rise to hearing difficulties without causing any significant increase in audiometric thresholds. This talk will provide an update to a multi-site prevalence study of such hearing deficits in roughly 3200 active-duty Service Members with and without a history of blast exposure. Also discussed are the results of a follow-up study designed to reveal potential causes of this functional-hearing deficit in two groups of subjects 1) normal-hearing thresholds ≤ 20 dB HL from 250-8000 Hz, no blast exposure, normal performance on an abbreviated version of the speech, spatial, and qualities of hearing questionnaire (SSQ), and normal scores on prevalence screening measures; 2) history of blast exposure, normal to near-normal hearing thresholds, and poor performance on either SSQ or prevalence screening measures. The long-term aim is to develop a strategy to separate hidden hearing loss from other processing deficits caused by blast exposure and to design more target rehabilitation programs.