Some folks can go right on about their business despite a thousand little distractions roaring around them, while others have to have total isolation. I think I fall somewhere in the middle. As long as a distraction isn’t specifically aimed at me, I usually can ignore it (unless it’s particularly noticeable). One exception is bedtime, when I’d really rather not have the world going crazy around my ears!
Speaking of ears, here’s a little info on decibels.