Welcome to AllDeaf!
I worked at a local video rental store years ago and I was the only deaf employee there. It worked out well for me since they were very understanding.
I did have a customer call once and I answered the phone. She was talking really fast and it was hard to understand what she was saying. So, I asked her if she could repeat and she yelled... "What are you... DEAF!?" I calmly replied... "Yes, ma'am. I am." Her response? "Oh, sorry..." then she hung up. Hehehe!