I'm looking for a story with a Dean who has lost his hearing. It's post season five and Dean has gone to Lisa's. He didn't notice at first that he was deaf. 

Lisa and Ben help him adjust. Cas shows up and he didn't know Dean was deaf either and he promises to fix it. Not sure of the pairing.
I have read the Sounds of Silence but that's not the one I'm after.

Please help!