My wife is convinced I have "spouse deafness", because I constantly say "Huh, what did you say?" when she is in the other room running the sewing machine, vacuum cleaner or watching the movie I can't hear.
Oh, do I know that one. I have absolutely no problem hearing anyone speak (unless they're on certain DVD's, of course). My wife, though, is another matter. She talks very softly, and often mumbles to herself when she's doing something. I can never tell if she's just mumbling, or if she's talking to me.
Last night she was washing her hair in the kitchen sink. She had her head down in the sink, and a towel over it which further muffled her voice. On top of that, I had the TV volume turned up. When I didn't hear what she said, she got really cranky.
OTOH, she speaks very clearly when she wants me to do something.