: This frequency is near the resonant frequency of the human eye (approx. 18 Hz), which can cause vibrating vision that creates "gray apparitions" or peripheral hallucinations.
: Chills down the spine, "shivering on the wrist," and an "odd feeling in the stomach". The "Ghost Frequency" (18.9 Hz) 17_hz_infrasonidos_para_la_ansiedad_inquietud_t...
In May 2003, researchers in London conducted a mass experiment by hiding a within contemporary music during two concerts. : This frequency is near the resonant frequency
The study of infrasound and anxiety often references the work of , who identified 18.9 Hz (very close to 17 Hz) as a frequency capable of causing "hauntings". "shivering on the wrist