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.


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA506629


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
      PROTECTIVE EQUIPMENT


Distribution Statement : APPROVED FOR PUBLIC RELEASE