I remember all the rock concerts I used to go to in the 70's and 80's........After the concert your ears would "ring" for a day or two. Voices were muffled, and background noises were nonexistent..........or maybe it was the marijuana.............anyway I'm glad/lucky my hearing is as good as it is now at age 43! I do try to take care of my hearing better now................I'm not ready for an ear trumpet just yet..