Also, the guy pushing infrasound as a concept is a grifter.

Wot? No. Infrasound, itself, is very real and was even brought into the film theatres in 1974 [with Earthquake!, using Sensurround.](https://en.wikipedia.org/wiki/Earthquake_(1974_film))

I saw this with the Sensurround and it was impressive!, and today probably 90% of the attractions in Disney and the like use some sort of infrasound. They aren't spending those big bucks on pushing all that low frequency air around for nothing. :-D

Now, the adult human ear only operates between around 20Hz and 15KHz, more if you're young and haven't been exposed to loud sounds, so you don't hear infrasound, but you can definitely detect it with your body.

I am extremely sensitive to low frequencies, but luckily, I nearly always like them. I once called my landlord and said, "Hey, there's some low frequency hum coming from the boiler, you should check it out, and a few days later he knocked on the door and told me that the pump was failing and in a week or two it would have been all over the floor. (He was a good landlord, how rare, which is why I stayed there for 14 years.)

A memory: we have friends who live over the world's busiest commerical canal, the Amsterdam-Rhine Canal. Because of strict regulation and enforcement, it's surprisingly quiet, I used to bike up and down there all the time. But when we sat in the building, you could occasionally feel ultra-low-frequencies for some really large engine operating, and you could step out on the balcony and see what behemoth was causing it, and see some calm monster cruise quietly by - it's pretty astonishing how much can be towed down a canal if it's geometrically straight. (My wife and I would also hang out in the polders not so far away, where you see huge boats going by, floating on a water level many meters above where you are sitting...)