That was my first thought when I read their post. Learning ASL is good, and will come in handy. But if you're sick of having to ask people to repeat, imagine how they are if repeating. Nobody wants to holler all the time, its probably not that theyre soeaking "so softly" you just cabt hear them. Get hearing aids, if you're still able to hear anything without aids, they'll probably work very well. You're the one with problem, you've got to be proactive and do something about. As has been mentioned, you're going to need an audiologist. The VA might be able to help as well as the vocational rehabilitation center.