Accession Number : ADA289690

Title :   Helmet Impact Tests: ANR Earcup Structural Integrity and the Effect of the ANR Earcup System on Helmet Energy Attenuation.

Descriptive Note : Interim rept. Sep-Dec 92,

Corporate Author : ARMSTRONG LAB WRIGHT-PATTERSON AFB OH CREW SYSTEMS DIRECTORATE

Personal Author(s) : Perry, Chris E.

PDF Url : ADA289690

Report Date : MAR 1993

Pagination or Media Count : 34

Abstract : An experimental effort was conducted to measure the structural integrity of the ANR earcup during helmet impact, and to measure whether the ANR earcup affects the energy attenuation properties of the helmet system during helmet impact. Helmet testing was completed using the Crew Systems Directorate's Helmet Drop Facility in which a helmeted headform experiences a guided freefall onto a rigid steel anvil to produce dynamic impact at 35 ft-lbs energy transfer. Standard earcups and the ANR earcups were compared in helmet impacts using the HGU-53/P and HGU-55/P helmets. The earcups were equal in their performance in that they did not have a negative effect on the energy attenuation properties of the helmet systems. The standard earcup's structural integrity was not compromised during the impacts; however, the ANR earcups sustained structural damage to their outer shell and their gel filled ear cushion.

Descriptors :   * FLIGHT HELMETS, *PPROTECTIVE CLOTHING, TEST AND EVALUATION, IMPACT, DYNAMICS, STRUCTURAL PROPERTIES, IMPACT TESTS, SHELLS(STRUCTURAL FORMS), RELIABILITY, CREWS, STANDARDS, ATTENUATION, EXTERNAL, GELS, EAR, FILLING, HELMET MOUNTED DISPLAYS, HELMETS, CUSHIONING, EARPHONES, ENERGY ABSORBERS, EAR PROTECTORS.

Subject Categories : Protective Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE