It can be difficult for me to tell where a noise is coming from. That can increase feelings of anxiety and paranoia . Classical example- last night there was loud knocking on a door. I got quite agitated thinking it was my door. I looked through the peephole no one there. First thought; they’re playing silly bg* . It happened several times.
When I am lying down in bed I sometimes hear two sharp, loud raps on my front door and I know no one is there. I have an efficiency apt too.
My dad who is very nutty would hallucinate as he fell asleep. He did art for awhile but never let his wild side show in his works, he was scared of what people would think, and scared generally of that side of himself.