Chat Boost automatically increases the online chat levels during intense gaming sequences, so communication from teammates isn’t drowned out.
As the game audio gets louder, the chat volume is automatically increased so you can continue to hear what everyone is saying. When the game volume quiets down, the chat level gradually returns to the normal volume setting. You can see it working by looking at the chat level light, which gets brighter as the game gets louder and the chat level increases.
It’s a simple solution to an annoying problem, and it happens automatically, so you don’t have to adjust anything!