Infrasound From Old Pipes May Explain "Haunted" Houses

That eerie feeling in your old house might not be ghosts after all. New research reveals that invisible sound waves from everyday items like aging pipes and ventilation systems could be making you uncomfortable without you even knowing it.

Scientists at MacEwan University studied how infrasound (sound below human hearing range) affects our mood and stress levels. They recruited 36 volunteers and exposed half of them to 18 Hertz sound waves while they listened to music. Nobody could hear the infrasound, but those exposed to it reported feeling more irritable and perceived the music as sadder.

The real surprise came from saliva samples. People who unknowingly heard infrasound showed elevated cortisol, the body's stress hormone, even though they had no idea anything unusual was happening. The effect occurred whether they were listening to calming melodies or unsettling horror sounds.

Researcher Rodney Schmaltz emphasizes that infrasound doesn't make people see ghosts. Instead, it creates unexplainable discomfort that some interpret as paranormal activity. "For someone who is not inclined to think in terms of ghosts, the same sensation would probably just register as a stuffy, uncomfortable old building," he explains.

The findings could explain widespread paranormal experiences. A 2025 YouGov poll found that 60% of Americans claim they've experienced something paranormal, and 18% believe they've lived in a haunted house. Many reported feeling unknown energies or unexplainable temperature changes, which could actually be physical responses to infrasound.

The Bright Side

This research gives us a powerful tool for understanding our environments better. People living in older buildings who feel constantly uneasy might simply need better ventilation or updated plumbing rather than an exorcist. The discovery also shows how our bodies react to things we can't consciously perceive, opening doors for future research into environmental factors that affect our wellbeing.

Scientists say longer studies are needed, particularly examining infrasound in traffic and urban environments where people often report feeling more tension. Understanding these invisible influences could help architects design healthier buildings and explain why certain spaces make us feel off without obvious reasons.

Science keeps turning mysteries into answers, one frequency at a time.