Hidden Phenomenon Could Explain Why Old Buildings Feel Haunted, Study Finds

Researchers at MacEwan University tested 36 undergraduates with music that did or did not include hidden 18-hertz infrasound.

Those exposed to infrasound reported more discomfort and irritability and showed higher cortisol, a stress hormone.

The study suggests low-frequency sound can affect mood and stress even when people do not notice it.

That could help explain why some old buildings feel eerie, without invoking anything supernatural.