I'm having a problem when singing that I didn't see coming with old age- I sometimes can't hear myself well enough to know whether I'm in pitch. I sing in a church choir, and that's when I have a problem. I think some of it is in the choir loft, too, but mostly it's just my fading hearing. Singing alone, I'm fine. I see that a lot of singers now wear what looks like a hearing aid- I assume it's a monitor? That's great, but they all seem to work through a PA. Is there such a thing as a headset and mic that just feeds right into the earphones? I need a self-contained way to hear my own voice in a crowd, if that makes any sense. Right now, I mostly use muscle memory, with mixed results. I don't want to be 'that guy' that everyone wishes would just retire.