Subsonic Death Rays (was Re: day job)

[Toby Paddock]

Reminds me of the quote:

"Undoubtedly, the most momentous piece of 
progress of 1969 occurred in Dijon, France 
on August 14 when Neil Rappaport of Festonna, 
NJ, lost forever the blueprints for a machine 
he had just invented which would have made it 
possible to create a louder noise then had ever 
been heard before." 
-- Russell Baker, New York Times, February 14, 1970

The loudest lowest *tone* I've been around was
Survival Research Lab's pulsejet.  I'm guessing
10-15 Hz?

In a lame attempt to make this on-topic I'll mention
when I did a vib test on a Velodyne subwoofer.  It has 
an accelerometer on the cone in a servo loop.  It was
powered, but no audio signal.  When I shook it at low
freq sine, the cabinet moved, but the cone tried to 
stay in on place.  

Hoping this finds you,
Toby Paddock
- -- -  - -- -  - -- -  - -- -  - -- -
http://www.seanet.com/~tpaddock
Pronteon Approved, 
not servo controlled