I hear buzzing, white noise, vibrations specifically similar to getting a call on vibrate on an iPhone, a flock of seagulls, an alarm clock… I think that’s it.
Side note: I had tinnitus after a major car accident in 2013. Nothing has made it better. I’ve had maybe 10 days (not consecutive) where I recognized hearing nothing. Otherwise, it doesn’t really stop; it just gets quieter.