Noise Attenuation Performance Assessment of the Joint Helmet Mounted Cueing System (JHMCS).

摘要

The HGU-55/P and HGU-68/P flight helmets have been meeting the needs of the USAF and the USN pilots respectively for years. The Joint Helmet Mounted Cueing System (JHMCS) flight helmet has been developed and introduced into the aircrew community to enhance the pilot's targeting performance. Louder conditions and missed radio calls have recently been reported by users of the HGU-55 A/P JHMCS helmet (compared to legacy helmets). The objective of this study was to determine what noise attenuation differences, if any, are present when comparing the JHMCS helmet configuration to legacy helmet configurations. REAT, MIRE, earphone free-field sensitivity and frequency response tests, as well as in-flight helmet shell tests were performed. Overall, there were no significant differences found when comparing the JHMCS helmet attenuation to the legacy helmets.