Most of the time I will tell you that I'm just plain deaf. I con't hear most of what is going on around me, I think that because of ADD I have learned to tune out in order to focus (don't ever try to have a conversation with me while the TV is on. I won't listen to you.)
People come to my office door all the time. We have a doorbell so that I know they are there, since I can't see the door from my computer (bookcases in the way). Funny though, today, I hear a voice say, "Ooh boxes, I'm going to snag those". I don't think my chair has ever moved so fast as it did when I blocked that box theif. We agreed that I would bring her my boxes as i empty them, as I am moving NOW not sometime after Christmas.