A old man thinks his wife is losing her hearing. He calls the doctor about it and the doctor says he can do a little experiment to determine the severity, "Ask her a question from the next room in a normal tone of voice, and keep asking while coming closer until she can hear you. That way you know the range of her hearing."
That night, he's sitting on his easy chair in the living room while his wife is in the kitchen cooking dinner. He estimates he's about 30 feet away. In a normal tone of voice, he says, "What's for dinner?"
She doesn't respond, so he gets up and walks to the kitchen doorway, about 20 feet away, and asks, "What's for dinner?"
She still doesn't respond so he walks 10 feet closer and asks, "What's for dinner?"
She still doesn't say anything, so he gets right up beside her and asks, "What's for dinner?"
She says, "For the fourth damn time we're having chicken!"