Regurgitating what Matt Ion said to Garth Robinson on 11-21-96  09:35 
 Gidday Matt....
 
 GR> point of the fact that internal organ damage could occur at the
 GR> close proximities. Personally I feel there may be some merit to
 MI> Low frequencies can have some pretty weird effects on the human
 MI> physiology.   When I saw Orion's demo van at a car-audio soundoff a few
 MI> years ago, they cranked ~125-130dB SPL of something like 
 MI> 28Hz (the lowest note produced by the world's largest pipe 
 MI> organ) through that thing, and sitting inside the van, I 
 MI> found it difficult to breathe as the sound was causing my 
 MI> vocal cords to resonate.  Sufficient SPL could probably 
 MI> stop the human heart.
Ooh, not a nice thought. There was, for whatever reason, specific
mention of damage to such organs as the liver, spleen, kidneys etc.
I believe that it is easy enough to "bruise" these organs, so, it does
not take much imagination to believe that intense doses of LF sound
could be injurious.
Some years ago I had a wee problem with a hi power sub amp that left
me feeling quite nauseous for a period of time. The amp developed a
power-rail feed-back, likened to "motor-boating" but at a very low
frequency, low enough to be barely perceptible, and it wasn't till I
did some testing (scope etc) to overcome distortion problems that the
nausious feeling dissapeared. It was then and only then did I make a
connection as to why. If I remember rightly the frequency was about
14-18Hz. Decibels unknown, but the amp used a 45 Vdc aside rail,
(90Vdc total) quasi complimentary output stage into 4 Ohm load. The
oscilation was approx 1/3rd Rail voltage.
 GR> Nah, I prefer my massages to come attached to a sweet topless
 GR> blonde. ;-)
 MI> I hear Fabio's available these days... ;-)
Sorry, that one's lost on me. Who the h...'s Fabio?
I think I've heard the name amongst the modern rock world?
My main taste in music is '40s '50s '60s, some modern stuff, but not a
lot.
        ......and you?
CFN, Garth, Sheryl & Amber,.... Dougals understudy!
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