Maurice and Sarah were getting old and Maurice felt his wife was losing her hearing.
He decided to stage a test. One day, as Sarah read the paper, he stood a distance behind her chair and said, in a conversational voice,
"Can you hear me?"
Silence.
He moved towards her. He was now 6 feet away.
"Can you hear me?"
Still silence.
Finally, he moved directly behind her chair and bent over, just inches from her ear,
"Can you hear me?"
Sarah replied, "For the third time, Maurice, Yes I can!"