There was an earlier thread on tinnitus https://news.ycombinator.com/item?id=21572827 where people had some techniques for relief. Maybe this could be useful.
replies(2):
Percussion massage gun with the sharp tip, aimed at the trapezius and levator scapulae. Those muscles can refer tension right around the ears. Targeting them can calm things down fast, especially if your tinnitus is posture or tension-related.
Not medical advice.