If I’m not misinformed, one can get Somatic Tinnitus from being tense, or having tense muscles, in the head and neck region.
I have a tense neck.
Last Saturday I bought myself a new pillow. A pillow, which was, it turned out, too high; too thick. I thought my bodies aversion for it would end if I just kept on sleeping on it. I had a similar thing happen when I bought a new bed. Felt like crap the first few days and then I got used to it; liked it. So I slept on the crap pillow for three days. Getting less and lighter, sleep while doing it. Not good. My neck hurt after night one but I thought I should be persistent. Now I’m super tense and I have a high pitch noise in my left ear. Not pleasant. Not pleasant at all.

I have now changed back to my old pillow. My non-high-pitch noise inducing pillow.

Let’s hope this shit comes to an end.