*I only hear a random high pitched tinnitus noise in one ear, rising and falling...

I only hear a random high pitched tinnitus noise in one ear, rising and falling in volume for max 10 seconds, about once every few months.

I get these, too. I just looked it up, and it's called "Sudden, brief, unilateral, tapering tinnitus (SBUTT)." That's quite an SEO-friendly name.