Actually, somewhere in the AAMC outline it does say you could bring your own earplugs, provided they are in their original packaging. For me personally, I had bought a box of mack's earplugs but then the proctor told me to take a pair out before entering the "inspection room" and to put the remainder back in my locker. The guy was a jerk, and my walk back to the locker resulted in several awkward stares (but I returned them back, so all is good). Apparently few people actually bother bringing ear plugs (at least that was how I felt). At the inspection room, you get your finger prints taken, they also do a scan with that bar thing ...can't think of the name. And finally, they ask that you squeeze the earplugs in front of them. After that they will direct you to the proper seating location, where your test is awaiting you. How exciting!!