Hi Anne
I did the same thing and I do believe there is a camera in the room. I can tell you that I never slept better once I had my machine at home and started using it. A few tips if I may, You won't be all that comfortable during the study as I guess you found out during the test. It will be pretty much the same experience except for the machine. It may take a few tries to get used to the mask but try real hard not to give up. Ask the tech to show you how you can remove the mask ( if you need to ) before they turn it on and also ask them if they can ramp it so that the air starts out slowly and gradually increases to what you need. Remember if you give up and go home before the test is completed you either have to come back and do it again or you can't get the machine so really try to find a way to tolerate the mask during the study. It will be a whole lot better experience when you get the machine at home. I find that if you put the mask on before the machine is turned on it is better. Another tip when placing the mask on do not open your mouth just continue to
breathe through your nose this is the absolute best way. All it will feel like is air or a wind machine and that is all it really is. All that it does is direct the air through the nose so that the flap stays open and you can't stop breathing.
I have to say that it takes time to get used to but I found that I awake fresh and alert and I don't have that oh I want to go back to sleep tired feeling anymore. I wouldn't sleep without it now because in the beginning I fell asleep once without it and oh my I dragged all day I felt like I hadn't slept at all. I think the benefits far out way the inconvenience and once you get used to it you don't even think about it being there anymore but this comes with using the machine every night. Eventually you will learn how to talk when the mask is on but in the beginning it will be a little hard because when you open your mouth all the air comes out but it can be funny once you are used to it. As for the noise my machine doesn't really make a lot of noise once the mask is on and all you here if you turn it on before you put the mask on is the sound of the air blowing out of the mask.
I wish you all the best with your study and I hope that you can get past the first few tries and that you keep using it because it really has a lot of benefits for you. Just keep trying.

Let me know how you make out.