Scientists Say They’ve Figured Out What Causes “Ghosts”

Researchers say inaudible infrasound from old building systems may make people feel uneasy and help explain why some places seem haunted.

A study found low-frequency sound below human hearing can increase irritation and stress in volunteers.

Participants exposed to these sounds showed higher saliva cortisol, a marker of stress response.

The findings suggest a physical environmental factor can contribute to ghost-like sensations and paranormal interpretations.