Accession Number : ADA621930


Title :   Performance Assessment of Hearing Protection and Communication Enhancement Devices: Peltor Comtac III and IV


Descriptive Note : Interim rept. Feb-Dec 2014


Corporate Author : AIR FORCE RESEARCH LAB WRIGHT-PATTERSON AFB OH HUMAN PERFORMANCE WING (711TH) WARFIGHTER INTERFACE DIVISION/BATTLESPACE ACOUSTICS BRANCH


Personal Author(s) : Gallagher, Hilary L ; Theis, Melissa A ; Swayne, Billy J


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a621930.pdf


Report Date : 01 Jul 2015


Pagination or Media Count : 44


Abstract : Hearing Protection and communication enhancement devices were designed for those who want to maintain natural hearing while protecting their ears from impulse and continuous noises like gunfire, explosions, vehicles, and machinery. There were potential advantages for this technology in military applications, provided an accurate and complete assessment of the performance was conducted. Peltor Comtac III (modified and standard) and Comtac IV headsets were assessed for: continuous noise attenuation, impulsive peak insertion loss, auditory localization, and speech intelligibility. The Peltor Comtac headsets reduced the noise level in the ear when the user was exposed to continuous and/or impulsive noise. The devices also reduced critical aural cues required to localize sounds essential to maintaining situational awareness. The active headsets may amplify low level sounds, but the localization performance was degraded in comparison to the open ear performance. The results from the speech intelligibility measurements for the Peltor Comtac headsets were acceptable in low to moderate noise environments, however, at 105 dB, the average scores did not meet current military standards.


Descriptors :   *ACOUSTIC ATTENUATION , *COMMUNICATION EQUIPMENT , *EAR PROTECTORS , *IMPULSE NOISE , *INTELLIGIBILITY , BLAST , GAIN , HEARING , INSERTION LOSS , MILITARY STANDARDS , SIGNAL TO NOISE RATIO , SPEECH RECOGNITION


Subject Categories : Acoustics
      Radiofrequency Wave Propagation
      Protective Equipment
      Voice Communications


Distribution Statement : APPROVED FOR PUBLIC RELEASE