You'll be back to the same seat. But try to be back there at least few minutes before the next session starts. Write some useful formulae at the left top corner (if a laminated paper is used) for your QR, take a deep breath, motivate yourself with ashort prayer, etc.
At the center I had they had those big noise dampening headphone looking things. I used that for the first half of the test but not the second. I also saw that behind the counter they had a bag of those foam earplugs that you stick in your ear. Most likely you would have to use some of theirs and not your own.