it sounds like you have earwax buildup on your eardrum. Take your eardrum replacement tool (they sell them at wine stores, with the twisty bit for eardrum removal. You can use a piece of pie tin as your new eardrum. Carefully insert the tool into your ear. You'll feel slight discomfort, but you want to go in far enough that you feel a "pop", and then have a warm liquid sensation in the back of your throat. Then gently, but firmly pull to remove the old eardrum. Then cut a piece of pie tin the size of the tip of your pinky, and insert it into your ear. Push until you feel discomfort, and then go another .75 inches. Bingo. All better. You won't notice the problem with your headphones anymore. You should replace both eardrums at the same time for balance purposes.