Accession Number : ADA506629
Title : Degradation of Auditory Localization Performance Due to Helmet Ear Coverage: The Effects of Normal Acoustic Reverberation
Descriptive Note : Final rept.
Corporate Author : ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD HUMAN RESEARCH AND ENGINEERING DIRECTORATE
Personal Author(s) : Scharine, Angelique A
Report Date : Jul 2009
Pagination or Media Count : 20
Abstract : Previous research has shown that listeners wearing the Personnel Armor System for Ground Troops (PASGT) helmet performed worse than those wearing the Advanced Combat Helmet on sound localization tasks. The PASGT has greater coverage over the ears. However, these helmets also differ in their suspension systems and profiles. Three versions of a single helmet design, differing only in the ear coverage, were compared in this study. As ear coverage increased, localization performance decreased. Most of the change was due to increases in large errors (25-deg). In addition, these effects were tested in both ideal laboratory acoustics and in a moderately reverberant environment. Moderate reverberation intensified the effects of ear coverage -- improving localization performance without a helmet and impairing it the most in the greatest ear coverage condition.
Descriptors : *AUDITORY PERCEPTION , *HELMETS , *EAR , *ACOUSTICS , INFANTRY , BODY ARMOR , SUSPENSION DEVICES , REVERBERATION , PERSONNEL MANAGEMENT , DEGRADATION , ENVIRONMENTS , WARFARE , LABORATORIES
Subject Categories : Acoustics
Distribution Statement : APPROVED FOR PUBLIC RELEASE