Scientists Identify Infrasound as a Potential Cause of 'Ghost' Experiences in Buildings
Recent research has identified inaudible infrasound waves, often emitted by old boilers, pipes, and plumbing, as a potential factor influencing people's perceptions of haunted buildings. According to Rodney Schmaltz, a psychologist at MacEwan University, these low-frequency sound waves can negatively affect mood, making individuals feel unnerved and uncomfortable. This sensation might lead some to believe in the presence of ghosts, especially if they are already inclined towards supernatural explanations. The study, published in the journal Frontiers in Behavioral Neuroscience, involved experiments where participants were exposed to infrasound without their knowledge. Results showed increased stress responses and mood shifts, suggesting that infrasound could contribute to the eerie feelings associated with haunted locations. 
