I think a design like the gas mask someone posted could have some feasibility, it would have to have ear protection as well. I'm thinking something that resembles a motorcycle helmet

__________________
"We will live life to the fullest, spit in the eye of those who hold us down and will proudly hang for it"
16th Century English Pirate.
Tippy A5 • Remote Line with Quick Disconnect • OpsGear G36 Fixed Stock • RAP4 M4 Style Magazine Expansion Chamber • J&J 14" Ceramic Barrel w/ APEX • Modded M4 Style Handguard • Full Cyclone Upgrades • Super R/T • PPS In-Line Stabilizer with 32 Degrees 1200PSI Gauge • JT Flex 8 Full Coverage Mask • NcStar Aimpoint Replica Red Dot Sight • Adjustable Laser Aiming Module with remote pressure switch • Pure Energy 72/3000 tank • Lapco 45 Degrees offset rail • Polished Internals • GXG Tac vest