Why some people are more bothered by low-frequency sounds

8 hours ago

Low-frequency sounds (infrasound) are perceived differently in the brain than other sounds, potentially causing stronger reactions in some individuals.
Humans can perceive infrasound if the sound level is high enough, even though it's often considered inaudible, experienced as a hum or physical sensation.
Research shows infrasound is registered in the inner ear differently: specialized hair cells may not pick up weak signals, but support cells can generate electric fields strong enough to trigger nerve signals to the brain.
The mechanism for infrasound perception varies between individuals, which may explain why some people are more bothered by low-frequency noise from sources like wind turbines or ventilation systems.
Small increases in sound pressure in infrasound quickly make it seem much louder, a phenomenon now understandable based on the new findings.

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