I carry a 4 inch pin-on button that says "Please face me: I lipread." I got this at a conference for the hearing impaired about ten years ago. I carry it whenever I have to travel. I do have some hearing loss, but the most important thing this pin does, is it gets me out of conversations with other people, when I really have work to do while I'm traveling. You'd be surprised how quickly people give up, when you misread their lips:

Seatmate: "Where are you going?"
Me: "What do you mean 'where are my goats?' I don't have any goats. If I DID have goats, they'd be checked as baggage."

Seatmate: "Have you been deaf since birth?"
Me: "No, I haven't been red since birds."