2 results for "hauntings"
BOING BOING
Study finds infrasound the likely horror in hauntings
Noise below the range of human hearing from old pipes, machinery and ventilation systems can induce stressful sensations, according to a study published by Canadian researchers in Frontiers in Behavio…
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Study: Infrasound likely a key factor in alleged hauntings
Low-frequency infrasound (below 20 Hz) can raise cortisol levels in saliva and increase irritability.…