Can General Anesthesia Make Tinnitus and Hyperacusis Worse?

Searched the forums, nothing current on this topic, so...

At the beginning of November, I had my second shoulder surgery under general anesthesia. Around that time, I started noticing that I was getting a "shimmering" around any sound that I heard, not just loud noise. I thought it might be my hearing aids that are getting older, but it happens even without them. I've had tinnitus for about 60 years - a high frequency tone that I've long learned to dismiss, but this new thing is like when sounds come in, that high pitched tone gets amplified and is the background that produces that "shimmer". I can even feel it in my ears, but it's not like the short hyperacusis bouts I've experienced in the past.

This didn't happen with my first surgery.

My question are these; Are there any studies or experiences that relate worsening tinnitus and hyperacusis to general anesthesia? Does it abate (it's been almost 2 months)? Is there something that can offset this worsening?

Thanks!