I have buzzing in my ears since I had covid but I also get ringing sounds too. It’s apparently tinnitus and I did have this before covid but it’s more constant now, I even wake up with it and it’s hard to get back to sleep with all the noises in my head. I researched it for more info and it seems that there’s no cure however they are experimenting with white noise and other sounds that might help, I had a little help from running water but it only works in the kitchen lol I spent more time standing in the kitchen with the water running and missed a lot of television, perhaps I should put the tv in the kitchen. I’m sorry I don’t have more information about it but hopefully it will decrease in time.