I hope it is a misunderstanding between the audiologist and the aide. Of course the audiologist need to speak with you about any concerns about your classroom. I wonder if you can talk to the principal about the situation and please bring along the aide so that she or he is a witness to what is going on in your classroom. They are very rude, both the audiologist and the professionals, and should be more respectful to talking over the issues with you. That is also discrimination ignoring you just because you are DEAF.
At least they should write down on paper to talk to you if they think that they can not sign good or not at all. That is ashame of them for doing that. I hope you don't get into trouble which is not a fault of your own but trying to pass the message on to them about how you feel and want them to communicate with you. They don't listen just like any audists do. 
