At least it is true to its name. Otherwise they would have called it tinnitus masking or sound therapy. 
The impact is not that heavy and it was said in advance that it would require tinkering. So I’ll look at it for another few days with the hearing loss profile and switch it to pink noise after that. I like a complete set of results, I guess.
As I am experiencing rather strong tinnitus at the moment it seems that my criterion was off: At 7700 Hz pure tone it sounds the same as my tinnitus. If I make it rather loud, the tinnitus keeps quiet for about ten seconds before it starts again. I can even repeat these results. Quite interesting!