Inform them of your stutter, I urge you to. Even if it doesn't help you relax, it will allow the Judge to know that you have a disability that you simply cannot help, and will thus help negate embarrassment for you. It's not like they're going to laugh at you. They don't laugh at crippled people, so why would they laugh at you? It especially helps if you actually inform them of your stutter, and even more so if you let them know it is a disability that you cannot help. Hell, maybe even go into detail about your stutter if you feel comfortable. Another important factor, **try to relax.** I've had many moments, especially in my old classroom, where I'd be sweating like a hog before I'd speak because of my stutter. Just try to relax as much as possible, it helps.