[sdiy] About infrasounds

[Grant Richter]

Infra sound of sufficient power and at the resonant frequency of the thorax
is reputed to be able to cause cavitation based hemorrhages. In other words,
the pressure extremes in your body at resonance may cause blood clots, which
may cause stroke or heart attack.

Urban legend has it that experimenting in such black arts is always fatal to
the experimenter...

"Those who worship dark Gods should meet them." - Conan the Barbarian

> 
> One problem with generating low freqs is the speakers.
> A 30Hz wave is 30 feet across. This tough to do with
> any kind of efficiency with a 15 inch driver. One way
> around this is to use an acoustic transformer, or as
> they are commonly known, horns. My Klpisch corner
> horns can reproduce down below 20Hz if in a big enough
> room.
>