Mom has dementia but is a very calm person. She is trading habits, first she was sniffing repeatedly for several months. She finally stopped doing that, however she is making a constant sound with her mouth. As if she is trying to blow bubbles with her mouth. She is up all hours of the night and morning . And it’s keeping her from sleeping. And me too.
He would moan but there was a variety of "moans"
We were in a store and I heard a little girl ask her mom.."why is that man so sad".. I saw her mom kinda tug on her arm as if to quiet her. I stopped and said to the girl "he is not sad. He makes those noises to comfort himself. Do you have friends in school that have autism?" When she replied yes I asked if they made noises or rocked back and forth. When she said yes. I explained to her that her friends brains do not work as well as her brain and they did these things to comfort themselves. I said "My Husband has a brain that does not work as well so he makes noises just like your friends. So don't worry he is not sad. Thank you for caring".
Noises are common. It can be used to relieve anxiety.
You learn to "tune it out", you wear headphones, earbuds, ear plugs. Anything that will "dull or quiet" the sound. You do not want to use noise cancelling headphones because you would not hear a change in the sound that might indicate trouble. Or you would not hear a fire alarm, carbon monoxide alarm.
If the noises your mom makes are due to anxiety that might be what you want to take care of. There are medications it might take a bit to find the correct medication and the right dose.
The other concern is if she is wandering late at night or early and the rest of the household is sleeping is there a possibility that she could get out of the house and wander off?
Trying to make demented elders "stop" doing things is truly an exercise in futility.