| Azimuthal auditory localization of gunshots in a realistic field environment: Effects of open-ear versus hearing protection-enhancement devices (HPEDs), military vehicle noise, and hearing impairment. | |
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MedLine Citation:
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PMID: 22264060 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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Abstract Objective: A controlled field experiment was conducted to evaluate localization of suprathreshold gunshot reports (from blank cartridges) with four hearing protection-enhancement devices (HPEDs) in comparison to the open ear with ambient outdoor noise and in 82 dBA diesel military heavy truck noise. Design: Five measures of localization accuracy and response time for eight shooter positions in azimuth were measured. Study sample: Nine normal-hearing and four impaired-hearing participants were tested. Results: Statistical analysis showed worse accuracy and response time performance with the electronic earmuffs (Peltor Com-Tac II™ in full gain position) than with the other tested HPEDs (Etymotic EB 1 and EB 15 High-Fidelity Electronic BlastPLG™ electronic earplugs, both set to Lo gain positions; and 3M Single-Ended Combat Arms™ passive earplug in level-dependent, "open" position). Performance with all HPEDs was worse than that with the open ear, except on right-left confusions, in which the earmuff stood alone as worst, and in response time, for which the EB 1 was equivalent to the open ear. There was no significant main effect of noise on performance. Hearing impairment increased right-left confusions. Subjective ratings related to localization generally corroborated objective localization performance. Conclusions: None of the tested HPEDs preserved "normal" localization performance. |
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Authors:
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Kristen A Talcott; John G Casali; John P Keady; Mead C Killion |
Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: International journal of audiology Volume: 51 Suppl 1 ISSN: 1708-8186 ISO Abbreviation: Int J Audiol Publication Date: 2012 Feb |
Date Detail:
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Created Date: 2012-01-23 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101140017 Medline TA: Int J Audiol Country: England |
Other Details:
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Languages: eng Pagination: S20-30 Citation Subset: IM |
Affiliation:
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* Auditory Systems Laboratory, Virginia Tech , Blacksburg, Virginia , USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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