Here's an oddity of modern life that perhaps someone might be able to explain. It seems that whenever people talk on their cell phones they speak much louder than they would to people who are physically with them.
I don't know why this is, but it's especially noticeable, and bothersome, in restaurants where a diner who gets a call will share the conversation with everyone in the establishment. As soon as he, or she, hangs up, however, you can't hear a word he says to the others at his table.
Why is it that people think their phone conversations interest the rest of us?