Try this: https://youtu.be/F8OyASCQyYY?si=oihrok9KYTYmTVpd. It’s a simple technique involving tapping your fingers on the back of your head. According to the video, it interrupts a nerve. The comments are full of people swearing by it. I only get tinnitus after loud music, and this makes it go away much faster. It’s surprising how few people mention this here; it might be the most effective method available, even if it’s not a guaranteed cure.