Had it for over 2 years now, sometimes ill wear ear plugs or filters on the flight deck. looking at maybe getting Bose QC30 noise cancelling headphones just to wear in the cockpit. With the cockpit speaker on I have heard that there is no problem in hearing ATC etc. Flying the airbus and overall I think it is a quiet cockpit compared to other aircraft so Im lucky in that regard. Know a few other people at my company who have it and they seem to manage. over the time I have had it it ha progressed from my right ear to now both ears however I haven't noticed any increase in sound. it doesn't really bother me anymore and I sleep fine at night. Things do really get better, just be safe