Sorry for shouting, but I wanted you to hear me above the racket. Mind you, if I were using a handsfree system based on QNX's acoustic processing suite, I wouldn't have to shout for you to hear me.
Confused yet? Just check out this video, which pits sonic mayhem against QNX technology, and all will be revealed:
In case you're wondering, the suite doesn't prevent you from hearing sirens and other important sounds. Rather, it helps ensure that the person on the other end of the call hears you clearly, and vice versa. This clarity can help lighten your cognitive load, so, if anything, you are more, not less, aware of what's happening around you. How cool is that?