Over the years, I've been treated on and off for my TMJ by a physical therapist.Unfortunately, most people on this site (including myself) can make their tinnitus louder by moving their jaw forward. It is possible that even many healthy people can start hearing ringing by moving their jaw forward.
Nevertheless, it is certainly worthwhile to treat your TMJ. I know of several people whose tinnitus had gone away after their TMJ got treated.
I mostly don't feel any pain or limitations in my jaw, it's just that I can't chew, swallow, or move my neck without hearing any internal sounds. Similar to tinnitus (I guess?), it took a few years to habituate to it. However, ever since developing tinnitus, my habituation has been faltering. Most likely due to increased concentration to that area of my body.
Are there any other possible treatments you'd suggest?