Infrasound, sometimes referred to as low-frequency sound, is sound that is lower in frequency than 20 Hz or cycles per second, the “normal” limit of human hearing. Hearing becomes gradually less sensitive as frequency decreases, so for humans to perceive infrasound, the sound pressure must be sufficiently high. The ear is the primary organ for sensing infrasound, but at higher intensities it is possible to feel infrasound vibrations in various parts of the body.
Joyce E
Thank-you for posting this. The discussion about sound and infrasound is really well done. Thanks again.
jennifer g
Great posting, thanks Wes . ? Wonder if this gentlemen has anything about 5G or smart meters?
Jack M
very interesting! thanks