From: Raymond G. Van De Walker (rgvandewalker@juno.com)
Date: Sat Jun 05 1999 - 03:28:47 MDT
How about infra-sound? A 3-10 Hz siren is easy to construct, and the
siren's output can be piped to a phased array to generate a beam.
I know that livers and stomachs resonate at about 6Hz, and that
resonating such organs would cause people to be violently sick.
A 6Hz beam should be low enough frequency to overcome the impedance
mismatch between concrete and air, therefore it should move right through
most buildings, even through most bearing walls.
It would be physically large, of course, at least several meters on a
side.
If one left the phased array off, and used a horn and dispersive
reflector, it might be a dandy way to make people go away, though.
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