Infrasound Raised Cortisol and Irritability Without Conscious Detection
A 36-person experiment found that 18 Hz infrasound raised salivary cortisol and negative mood appraisal even though participants did not detect the infrasound above chance (p = 0.241).1 The result is a controlled acute signal, not proof that every real-world low-frequency noise complaint is physiologically caused by infrasound. Research Highlights Cortisol rose with infrasound: Infrasound …