This video explains how infrasound at around 18–19 Hz—a frequency below human hearing—can create ghostly experiences. Engineer Vic Tandy felt haunted in his lab (seeing a gray figure in his peripheral vision, dread, cold sweats) until he discovered a standing wave from a fan vibrating at exactly 18.98 Hz. This matches the resonant frequency of the human eyeball, causing subtle vibrations that smear peripheral vision and produce illusory shapes, while the low-frequency pressure triggers unexplained anxiety and unease. Common household sources like fans, HVAC systems, fridges, or windows can generate it, fooling people into thinking rooms are haunted. The fix is simple: adjust fan speeds or move equipment to detune the frequency, often resolving the “haunting” instantly. The narrator urges listeners to test uneasy rooms themselves before assuming the supernatural.
