My husband has hearing loss, and he wears hearing aids. He has worn them for 8 years. He still has to remind me when he cannot hear me. I can always tell when he needs to get them adjusted because he turns up the TV and stereo to a level that is uncomfortable to me.

I 'know' that he cannot hear me if I am behind him, or if there is background noise, but I forget, and he has to keep reminding me. It is a team effort of patience and learning to adjust and accept the hearing loss.
The thing that annoys me is when he responds to something that I said with a 'yes' or 'okay', only to find out later that he had no idea of what I had said. I used to accuse him of not listening - until he was diagnosed with the hearing loss. When he purchased the hearing aids, it was the cost that really grabbed our attention. No more denial!

@golden418, it is possible that your wife does not understand what it is like to have a hearing loss. My husband has explained that he doesn't hear when..; or it sounds like...; or I can't understand ... I am still learning that it has to be an ongoing adjustment for both of us. The other thing is that when hearing loss comes on gradually, it can be harder for family and friends to ignore.