Moving parent to different room for a while.
My mother moans, groans, makes sucking noises, burbs, sneezes and yawns, out loud so as to be heard several rooms away. Being deaf as a door, she can't hear anything and claims to be not aware. We believe, at the very least, she could not possibly make all those noises and not feel it. She refuses to get a hearing aid.
Her home health nurse came the other day and my wife told her we shift her to another room, on occasion, for the peace an quiet, and felt guilty about it. The nurse told us not to. She told us we were some of the best caretakers she dealt with. Losing patience is all part of it and moving her to another part of the house, not shut away, is perfectly fine. Mother making all the noise, none of which is medically necessary, is her way of getting attention. Removing her from our area is our way of saying it is not acceptable and we don't have to be subjected to it.
When she does return, she stops making noises for a while. When she resumes, she's returned to the other room, which is a family room, btw, out of hearing. Fortunately, our home is big enough. For those out there, don't feel trapped. Enforce the fact that unacceptable behavior is not to be tolerated, respectfully. We no longer yell and scream, we relocate. Life is not perfect, but it is better.