Visual snow is another interesting thing like ears ringing. Everyone's eyes have visual snow, but sometimes people experience it more strongly or become distracted by it. A lot of people don't notice their visual snow or have forgotten about it until they experience depersonalization. Upon noticing it and being disturbed by it they want to rid themselves of it, but it's a normal phenomenon.
I get that ear ringing can be very annoying. It can add an extra layer of difficulty to meditating or relaxing. Sometimes a meditation session or attempt to sleep becomes more about trying not to be bothered by tinnitus, in which case background noise might be helpful. Protect your hearing, people, as well as your jaws and teeth.