> has anybody else heard about the effect of a 12-13hz sound
> on the human body ?

Some police forces use infra-sound or have tried it for crowd
control with the effects you describe. I don't know the size of
the transducer though

> thought it may have application if you don't mind a bit of heavy
> duty cleaning ;-)

I'll just pretend I'm a Saturday night taxi driver and get on with it

If you really could make them queasy then introduce a few smells
to cap off a memorable night

> one of my teachers from yrs ago was involved in a study on it.....
> resonant frequencies of diff parts of the human anatomy....

I've heard that career truck drivers suffer all sorts of soft-tissue
and organ ailments caused by infra-sound

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