https://www.frontiersin.org/articles/10.3389/fneur.2022.958730/full
There are days I wish had that “hat”!
I have posted this before but there are some new readers.
Till we get the magic bullet these pressure points may provide some help for some! Put the heel of your hands in front of your ears but behind your jaw. Lace your hands back until both of your middle fingers meet at the base of your skull and top of your spine. Take your index fingers and tap them on the back of your middle fingers at the back of your head where your middle fingers meet, maybe 30 second or a minute. It will help reduce the ringing for a while for some people.
Also, press your thumbs between the ear and the jaw and your index fingers on the soft spot at the top of your skull. This might also help.
There may be other pressure points. Check the internet. Good luck!