Scientists Link "Haunted House" Feelings to Hidden Sound

Your body might be picking up on something real when a building gives you the creeps, but it's not ghosts.

Scientists at MacEwan University in Canada have discovered that infrasound (sound waves below 20 Hz that humans can't consciously hear) can make people feel uncomfortable and on edge. These low-frequency vibrations often come from old boilers, rumbling pipes, and aging building systems, exactly the kind of infrastructure you'd find in supposedly haunted locations.

The researchers tested their theory with 36 volunteers who listened to both calming and unsettling music. During half the sessions, the team secretly played infrasound in the background. The results were striking: participants couldn't tell when the infrasound was on, but their bodies could.

People exposed to infrasound felt more irritated and unsettled regardless of what music was playing. They also rated both types of music as sadder than participants who didn't hear the infrasound. Even more convincing, saliva samples showed elevated cortisol levels, a clear sign their stress response had activated.

"You cannot hear infrasound, but your body and your mood appear to respond to it anyway, and the response tends to be unpleasant," psychologist Rodney Schmaltz told The Guardian. For someone already open to supernatural explanations, that bodily discomfort becomes the perfect foundation for believing in ghosts.

In an earlier experiment, Schmaltz placed infrasound speakers throughout a haunted house attraction. When the speakers turned on, visitors walked through significantly faster, unconsciously trying to escape the unsettling sensation.

Why This Inspires

This discovery doesn't diminish anyone's experiences in supposedly haunted spaces. Instead, it shows how our bodies are remarkably sensitive instruments, picking up on environmental factors we don't even know exist.

The research also highlights how our beliefs and experiences shape our reality. The same stuffy, uncomfortable feeling registers differently depending on whether someone expects ghosts or just old plumbing. It's a fascinating reminder that science and human perception work together in unexpected ways.

The team notes that infrasound is likely just one piece of the puzzle. It doesn't explain visual sightings or all the complexity of why certain places feel different. Future studies will need to measure actual infrasound levels at famous haunted locations to confirm the connection.

Understanding these hidden environmental factors could help architects and building managers create more comfortable spaces for everyone.