Streamers and pop culture on Instagram: "Many “ghost sightings” in old houses are actually caused by something called infrasound — super low-frequency sound waves (below human hearing range) that can be created by things like old fans, boilers, or even wind through cracks. Credit - @itsjaydaddy 😱 These sound waves can cause: Feelings of unease Chills Seeing “shadows” Even the sensation that someone is watching you! So… your house might be haunted — or it might just have bad plumbing. 🏚️🔧👻 St