One thing that happens after you have children is that your ears become tuned in to your child's cry. I don't know if they have done studies on this, but I believe I could hear a baby's cry from at least one mile away. The most distracting is when you are watching television after you have put the kids to bed and there is a child crying in the background of the show you are watching. I can't tell you how many times I have muted the television to go upstairs after hearing a cry, just to realize it was part of the background noise in some commercial.