I think tinnitus is different for a lot of people. Some people really need to have a masking sound that is almost, but not quite as loud as the tinnitus. Others, like me for example, benefit from a soft background sound like rain or wind chimes - just something else for the brain to hear.
The other consideration I believe is whether the tinnitus is associated with hearing loss or not. For people like me with ringing that matches my audiogram (associated with hearing loss), hearing aids are of great benefit because you are feeding the brain the sounds that it is missing and craving to hear (the way I explain it to myself). Just amplifying background noise to fill the silence is half the battle. Others that have sudden onset tinnitus without a corresponding hearing loss seem to be the subject of notched music/white noise therapy, neuromonics, etc.
Im not an expert by any means, just someone who has had tinnitus for 20 years and has done a lot of lay-person research. I am actually in the process of getting my first ever set of hearing aids, which I have put off for far too long… I am in the process of getting the Phonak Audeo Q with tinnitus management through the Veterans Administration right now and will receive them mid November. I also have an appointment at Costco later today to check out and probably purchase their new Signature 5.0 hearing aid. This one doesn’t have a tinnitus feature, but I’m not convinced there’s much value in having it built into the HA. Most of the time i am able to ignore my tinnitus, and for those times I can’t, I have some MP3 files I can play with headphones.
As I mentioned above, gentle rain and wind chimes are my favorites.