This is a garbage paper. Look at figure 5 - every treatment but one, including the control, had roughly the same effect. It's all just placebo. also notice how few people were in each treatment group: just 10 or 11! You can see how much their scores vary before treatment in figure 5. I think the differences in figure 4 are just due to how they're normalizing to the control.

I also find the THI to be an absurd metric since a large component of it is measuring your psychological well-being. Why don't any of these studies do pitch and volume matching? The apparent loudness is what i actually want to reduce.

Maybe I'll start a youtube channel where I carefully review/roast tinnitus papers, it really seems to be a field with no standards.

Fair enough, I didn't read carefully. I would subscribe to such a channel.

Oh, to be sure I definitely didn't mean to project any of my rage in your direction, sorry if it felt that way.