I guess it is weird, but I can't really block out sounds. Just concentrate on something else. Same for smelling.

[Speaking of which it's time to light up a cigarette. He needs the barrier so he can concentrate on the smoke and not get overloaded.]

I've spent the last 20 years living in Manhattan, over in Mutant Town. You get used to the explosions eventually, I think.... and all the other noises you run across.