Well said,
@AfroSnowman!
I'm no doubter or naysayer,
@R. David Case, but I do believe in the power of statistics to sort fact from fiction. Doing stats and coding are a big part of my daily job. That said, if you have data you could supply to me that shows the number of people who have tried your product and the number who have benefitted from it, I will donate my time to analyze that dataset (some kind of generalized linear model with a binomial distribution) and report the results here. Surely the data will not have been binned by participant characteristics, but it could help others here (including myself) know whether it's worthwhile to continue adding to this thread. The analysis for that kind of data is extremely simple... there is truly no reason whatsoever not to do such an analysis. If what you say is true, the results I'll provide would only strengthen your case. Let me know if you would send that dataset over to me.
Ciao!
EDIT: With David's data, I would also like to solicit responses from people here or elsewhere who (1) have tinnitus, and (2) have listened to something on headphones at some point in time while having tinnitus. This would enable comparisons among the two groups. Super not FDA-approved, FYI, but hell, it's better than 98 pages of conjecture