How long should it take for normal hearing to return after a loud concert?

I attended a loud rock concert 5 days ago now. Following the concert I had tinnitus in both ears and trouble hearing. Normal (or seemingly normal) hearing returned to my right ear after about two days. However my left ear still has ringing, and sounds are extremely muffled. Is it Read more

What amount of hearing loss (in Db) is allowed to pass a class 1 medical to get a commercial pilots licence?

basically as above. I think I have about a 15Db loss in hearing at some of the higher frequencies in my left ear only. What amount of hearing loss is acceptable to get the class 1 medical required to do the commercial pilots licence? Thanks.