Re: [Phys-l] air pressure question

[brian whatcott <betwys1@sbcglobal.net>]

On 1/26/2011 4:12 PM, John Mallinckrodt wrote:
> On Jan 26, 2011, at 1:35 PM, William Robertson wrote:
> > Still doesn't answer my question about the Floogle, as it's called in
> > some places.
> I don't think I've ever heard it called a "floogle" and I can't find any references to that on the web.  Apparently you didn't like Frank Crawford's 1974 AJP paper that I referred to a couple of days ago.  It is considered definitive on the topic of singing corrugated pipes in many quarters.
>
> John Mallinckrodt
> Cal Poly Pomona

I will say that I passed over this reference, knowing that AJP is a 
commercial entity whose prices do not attract me.   But I am glad that 
John persisted, for I arrived at another  academic source for the same 
paper.*

<http://www.physics.umd.edu/lecdem/services/refs/refsh/Crawford-SingingPipes.pdf>

*http://tinyurl.com/4f9dpew

En route, I came to realise that the author  was from that band of  
intrepid physics enthusiasts
who love the mundane theophany. (A corrugahorn from a corrugated gas 
pipe, a liquid hydrogen bubble chanber which led him to an authentic 
mode for cold fusion at a low rate from incident muons, the rubber 
(adaptive) mirror etc., etc.)

This paper casually mentions two ways of activating such a horn: out a 
car window, or by whirling.
Floreat Frank Crawford   - 2003

Brian W