The Pelche Effect (not the correct spelling?)

Well, I am looking into some paranormal information I received last week on what I know as the Pelche Effect (I am not sure about the spelling). The Pelche effect is a theory that uses ground water and limestone slabs of bedrock to explain paranormal activity both audibly and visually.

Audibly, people experience noises like doors slamming, walking, and other audible experiences. It often occurs at night. Some say that the night would explain some of these noises because of the moon's gravitational pull, although we know that the moon has a gravitational pull during the day as well.

Visually, people experience movement around the house, people sitting next to them, and actual apparitional ghosts. As to whether they are actually dead people, this is highly debated. Most scientists believe the way the water and chemical properties from limestone rock can cause hallucinations in homes who sit over certain slabs of bedrock.

If you know of any other information regarding this theory or want to comment on similar theories of apparitional and hallucinatory type, please feel free to do so.