A head impact telemetry system is a tool that helps people understand what happens to a person's head when they experience a hit or impact. To make it simple, imagine that you have a magical hat that can measure the force and movement of your head when you accidentally bump it into something. This magic hat has sensors that can measure how hard you hit your head and in which direction.
Similarly, a head impact telemetry system is a set of sensors that are placed on a person's helmet, usually used in sports like football or hockey, to measure the force and movement of a hit. These sensors can tell coaches and medical professionals how hard a player was hit and if they need to be checked for a concussion.
The information from these sensors is sent to a computer or tablet, which can give immediate feedback on the severity of the impact. Coaches and medical professionals can use this information to make decisions about whether a player should be taken out of the game, or if they need further medical attention.
So basically, a head impact telemetry system is like a magical hat that can tell us how hard someone's head was hit, and help us keep players safe in sports where hitting and collisions are common.