#Infrasound

A Canadian study found infrasound, which humans cannot consciously hear, may still trigger stress, irritation and elevated cortisol levels.

An anonymous reader quotes a report from Ars Technica: In a makeshift demonstration kitchen in Concord, California, cooking oil splatters in and around a frying pan, which catches fire on an unattended gas stove. Within moments, a smoke detector wails.…

A hidden force may be quietly shaping how you feel—and you’d never even know it. Infrasound, an ultra-low-frequency vibration below the range of human hearing, is everywhere from traffic to old buildings.…

You walk into an old building, and something feels…off. It could be haunted, but this is the most likely explanation.

Researchers say infrasound -- low-frequency vibrations from things like pipes, HVAC systems, and traffic that humans can't consciously hear -- may help explain why some old buildings feel unsettling or "haunted." Rodney Schmaltz, senior author and…

Low-frequency infrasound (below 20 Hz) can raise cortisol levels in saliva and increase irritability.

Infrasound—noise below the range of typical human hearing—from power, heating and mechanical systems within buildings can make people feel irritated and induce a stress response, according to a new study

Inaudible infrasound from old pipes and ventilation systems may affect how people feel, research indicates

Researchers have found that people exposed to infrasound feel more irritated and stressed, even when unaware of its presence.