A new study suggests that infrasound—low-frequency sound below human hearing—can raise stress hormone levels and alter mood, potentially explaining some 'haunted' sensations in old buildings.

New research suggests that eerie sensations often attributed to hauntings may be caused by infrasound—low-frequency sound waves below human hearing. Experiments found that exposure to around 18 Hz ...

Very low-frequency sounds, which humans cannot hear but can lead to high stress hormone levels in the body, could be an explanation for "haunted" locations, a new study finds. Such sounds below 20 ...