How would you address it?
The phones have to ring, alarms need to be heard, psychotic patients yell, and people have to talk loudly to be heard over those things. Short of a shot of geodon for the psych patient, I can't see a way around the other things.
It does drive me up the wall though when the place has quieted down, but people are still using their "peak rush" voices. Ugh. Be quiet! And don't wake the natives.
It also irritates me, though I myself have been guilty (and still am on occasion, but I stop when I catch myself), when we're all caught up, waiting for tests results, sitting around gabbing, and there are patients in the hallway who don't understand that we're in a holding pattern. They just see and hear us, and think we're sitting on our ass.
You got time to lean, you got time to clean. And if you want to take a minute and chill out, do it quietly!
Sorry for the tangent.