Does anyone have experience healing from misophonia/sound sensitivity?

Hi there @obscure-corner and welcome.

And, my commiseration. Frequent obtrusive sound is the worst, whether it's constant or random. Very debilitating to equanimity!

And addressing your equanimity is where you have to go to. Did you ever do one of the programs and get into the skill of expressive writing? AKA journaling, although I like to emphasize that there is no keeping of a formal journal, which is why I've ended up calling it "writing s*** down".

This kind of situation is perfect for inducing rage. There's the obvious and open rage against the person inflicting this upon you, but there's also the deeper rage that we humans have when we're faced with any situation over which we have no control. Uncertainty fits into this as well.

I would suggest you get out the pen and some old notebook paper and just start writing about this situation, about how it makes you feel, about how you can or can't do something about it, about what you'd like to do or say to the person, etc etc etc- basically whatever comes into your head. You might even have random thoughts about incidents from your past, even back to childhood. Don't ignore those random thoughts! They are important, EVEN IF your brain tries to tell you they aren't (it's lying). You can just write it on a separate line as it pops up, and go back to it later.

Write for at least 20 minutes (this is the recommendation of the queen of journaling, Nicole Sachs, who has a dedicated page on her website about how to JournalSpeak (her term)).

See what happens!