I tried the earmuffs solution - which is a brilliant idea. For me, the extra noise silencing protection did not work. The system still cannot classify the test results. So, I still think it's just a matter of luck if you happen to get your hearing classified. However, I'm also beginning to wonder if the degree of hearing loss is an issue with getting classified. I know I have hearing loss, particularly in the low frequency range. So, for those of us with hearing loss of various types and severity, the classification system may be tripping up.
I will say that, if you didn't have hearing loss before, you very might following multiple rounds of starting the test and listening to the test calibration music.