"William Sommerwerck" wrote:
"dave" wrote in message m...

We learned 16 Hz is perceived more as a train of pulses and
less like a sinusoidal tone; it is right on the border of flatulence.

When I put 16Hz through the Watson woofers in my concrete-slab
apartment... //nothing// audible came out of the woofers. But everything
in the room rattled.

I used to rattle things in my old basement. It resonated around 30 hz, but
16 hz will shake things. With 30 hz in the basement, you had to be in the
right spots to hear or not hear 30 hz.

Greg