For most topics I recommend dr Jo as a starting point Bob and Brad if they want to step up the game.
I clench, have a mouth guard, but still clench. Don’t know of other treatments but would love to find one. I have tinnitus either as a result or from a bike accident which hurt my jaw and started the clenching.
For me, the ringing is only noticeable when it is quiet, so bed time is annoying. I run a small fan for the white noise to compensate. Other times of the day, music is playing while I'm working (not headphones).
See also https://bgr.com/2017/02/08/mercedes-pre-safe-sound-pink-nois....
In age-related "hearing loss," the threshold of sensitivity rises while the threshold of pain stays the same or even decreases slightly. So the range of volumes you can comfortably discern becomes narrower. This explains why simply increasing the volume often does more harm than good. What's really needed to treat hearing loss is frequency-specific volume compression.