I am almost amused by how my tinnitus has changed over the years.
It was the high pitched tone for years, and has now evolved to the sound of rushing water.
I can be in the most (I assume) silent place and all I hear is wind noise, static, or white noise.
There is no such thing as silence. It is just there, but at least my sense of sight works well going on 80.
Mine has not changed in the 10+ years I have had it.