Any suggestions on how to cope with a mother who makes constant verbal sounds?

I pray for patience & tolerance but it isn't working!!

My father makes sounds all day long. Loud nonsensical noises. He mews when he opens the fridge, growls when he eats, sings when he watches tv, repeats parts of words over and over and over. He shreiks and groans in pain (though he can't tell me what hurts or let me take him to the doctor) continually. All of this is loud enough to hear through doors and walls. He is able to restrain himself if visitors are in the house so he has some sort of awareness about the appropriateness of his strange behavior. I suspect he just loves to annoy me and possibly gets some sort of affirmation from his constant noise making. This isn't an answer, just an acknowledgment that these behaviors are not unusual. Lord help us all!

Would a video monitor and head phones be a possibility? That way you can check in with her visually and know she's safe and listen to tunes or podcasts. And not let
her unconscious sounds drive you batty.