I found this article which presents different foods that may help improve hearing.
http://www.associatedcontent.com/art...hat.html?cat=5
I don't how viable a source this is, having read another article about clearaudience which sounded a little far-fetched.
Anyway to recap, what you need is alpha lipoic acid, vitamin E and vitamin B12.
Just found this aswell:
http://209.85.173.104/search?q=cache:nxC978PYGYcJ:www.rd.com/living-healthy/protect-your-hearing/article16093.html+audiologists+"glass+of+wine"&hl=en&ct=clnk&cd=7&gl=us&client=firefox-a

It appears magnesium is good too. So is a little wine on a regular basis.
I take multi-vitamins every once in a while. What about you guys?