The war in Iraq is serving to highlight traumatic brain injuries (TBI) and now the U.S. Army awarded Simbex, of Lebanon, NH, a million-dollar contract to develop sensor-studded helmets for combat soldiers. They could reach our soldiers as early as December.

They are designed to "measure the shock from explosive devices." The most common cause of TBI is improvised explosive devices (IEDs), which emit shock waves–waves of air pressure–that travel at around 1,000 feet per second, or close to the speed of sound. While such blasts can cause devastating wounds, and even death, they can also rattle the brain’s soft tissue, causing invisible, permanent damage.

Simbex has equipped the combat helmets with sensors that measure the magnitude, location, and direction of blasts and the pressure changes that occur because of the resulting shock wave.

"There are lots of different types of injuries that can be caused by blast events," says Jeff Chu, the vice president of engineering at Simbex, "and we are only measuring two of the parameters that are most associated with shock waves and blast events: the acceleration of the body and pressure."

MILTRAK combines navigation a module and a small rugged display which provides near-real time situational awareness information. The portable display shows the positions of "similarly equipped friendly (blue) forces overlaid on a relational display, raster map, or geo-referenced aerial photograph." This 310g unit (including batteries) is connected to any suitable voice and data capable UHF or VHF personal radio. – spacewar –