I'm on the exact same boat. Same age and got it randomly this Summer. Are you able to modulate the pitch by moving your jaw sideways or wide opening it? Would be great to bounce off some ideas. I'll drop you an email if that's OK.

Just moving my jaw doesn’t affect mine, but moving it to the side and flexing whatever muscles involved in that motion are definitely makes mine louder, just for a second.

I’ve always wondered if that implied there must theoretically be a way to cure or reduce it by reducing pressure in there through surgery or stretching or something. I’ve done a bunch of neck stretches in the past that I think mostly relieved my anxiety about it, but may have helped. My motivation to fix it has gone down a lot though as I’ve gotten used to it.

Have you checked your hearing?

A friend of mine has tinnitus and found out he has bad hearing. Hearing aids fixed zmthe tinnitus.

Another friend has the same, but no aids yet.