@makeyourownluck There are really stories about people who recovered after 3 years. Unbelievable! I red about an musician who lost hearing 70% and after 3 years it came bake to 100%.
A few weeks ago I had a talk with an audiolog who also told me that she had hearing loss in the high frequencies and that it took almost 2 years to recover.
You can improve though. Some people even get full resolution.