ParaLibrary Infrasound

Infrasound

Updated September 17, 2026

Acoustic sound waves with frequencies below the lower limit of human audibility (under 20 Hz). Frequencies around 18.98 Hz resonate with the human eyeball, inducing optical hallucinations, dread, and hyperventilation.

Investigation Data

DOMAIN:Acoustic Physics
FIELD TIPS:

Measure acoustic frequencies below 20Hz during baseline sweeps using specialized low-frequency microphones.

DEBUNKING:

Industrial exhaust fans, wind shearing around architectural corners, heavy highway traffic, and low-RPM motor equipment.