@inthegarden I’ve talked about it in the parents helping parents, here and there over the years.
My fil is profoundly hearing impaired. So much so about 10-15 years ago he got cochlear implants. They don’t help that much. My husband is hard of hearing, he got hearing aids in his 50’s but his hearing loss is not as profound as his dad’s.
I have a loud voice, I enunciate. As I tell people, after being told that I talk too loudly all my life, I’ve found my tribe, the hard of hearing 
It drives me crazy that my mil will not work on talking to her husband. She gets mad that he can’t hear her. She talks to him from the other room, turns her head. Doesn’t enunciate. I get that her voice isn’t as strong as it used to be but she doesn’t try. Just gets annoyed.
This is going off topic but I so know what you are talking about, even though my hearing is good.
I’m your girl, I’ll be looking at you, talking in my loud voice and being clear!