Can your hearing repair itself?

So recently I have been noticing I have a constant ringing in my ears. Its partly from working in really loud environments and partly from constantly having headphones with load music on for years. I am now in a situation where I have to do neither. Will my hearing repair itself or will it be damaged forever? If it does repair itself would a few weeks with ear plugs in (as in the kind to make it quieter) help do you think?