A participant who travelled to Michigan and was part of a study for this posted his experience on Reddit:
"It was a double blind crossover model, so everyone got the real treatment and the sham treatment at separate times. I was not unblinded following the experiment. However, I felt that I reacted moderately to one of the two periods and not the other, and this was reflected in both my THI scores as well as, I believe, objective volume matching performed in the lab.
They were able to tell me that some people responded to both the experimental protocol as well as the sham protocol, some people did not respond to either, and some people responded to the real treatment but not the sham treatment. Further, no one responded to the sham treatment and not to the real treatment. Therefore, since I responded to one and not the other, I responded to the experimental protocol.
My tinnitus did not disappear, but my ratings for volume decreased moderately, and my ratings for distress plummeted as a result. The effect wore off after a couple days of not using the device.
I have had other periods where my T has been less significant, unrelated to any treatment -- but the 2-3 weeks that it seemed to be working, it did so much more consistently, and in some cases dramatically, than it does in general.
Worth noting that I spent some amount of time and money traveling regularly from DC to MI to participate, so I have a bias in that I want to believe this is a real thing. The animal data is pretty compelling to me, though."
This same user also posted their tinnitus background on the same page on reddit:
"14khz CRT-monitor whine, predominantly on my left side, where I also (shockingly, I know) have a dip in my hearing thresholds around 14khz. Other tones and sounds, too, but that one is the only one that consciously bothers me.
I can only guess, but I believe it's some combination of noise exposure, chronic anxiety, TMJ, and possibly exposure to and withdrawal from drugs including benzos, SSRIs and Wellbuterin. The thing which really made it bad was a single concert without hearing protection, attended during an extremely stressful period... but the anxiety of all that drove me back to benzos, and the tinnitus didn't really set in as a chronic thing until I withdrew from the benzos again a couple years later. I was also a premature baby with a bunch of serious childhood ear infections. So your guess is as good as mine."