[sdiy] Tubular Bells

[Tim Ressel]

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Yo,  
 
In the tome "Music, Physics and Engineering"
by Harry F. Olson there is a section on figuring the
resonance freq of various structures. It may be of
some use.

--TimR

--- James Patchell <patchell at cox.net> wrote:

> Well, I am glad there are other crazy people like
> me.  I will post any info 
> I run across, but I will tell you, it sure looks
> like information on this 
> subject is scant at best.  The quickest way sure
> looks like just buying the 
> tubes....but that is no fun.
> 
> 
> At 02:33 PM 12/15/2004 -0500, Glen wrote:
> >At 02:02 PM 12/15/04 , Peter Grenader wrote:
> >
> > >If you can afford it, titanium tubes are terrific
> for this as they are hard
> > >as nails (actually, harder) and sustain
> wonderfully. Plus they can be
> > >purchased as either straight gage or double
> butted, meaning the walls get
> > >thinner in the center of the pipe by about 2 mils
> - perfect for ringing.  I
> > >know this for a fact because I've got a bicycle
> frame made out of the stuff
> > >and the frame builder has made some really
> interesting wind chimes in his
> > >spare time, one tuned to microtones.  He really
> got into it for a while.
> >
> >I thought that if the walls of the tube weren't of
> uniform thickness, it
> >resulted in a "beating" sound in the tone of the
> bell, which some people
> >object to? I believe I read that on a web page
> describing the mechanics and
> >theories of old church carillons.
> >
> >There is one other detail I remember, which might
> be worth passing on.
> >Deagan used tubes which were closed on one end.
> This changed the ratio of
> >the resonant pitch of the air column, with respect
> to the resonant pitch of
> >the metal tube itself. It was claimed to result in
> a more pronounced strike
> >tone, and a more melodic sound when played with
> other instruments, if I'm
> >not mistaken. The wind chimes that I mentioned
> earlier are open at both
> >ends. Then again, they aren't engineered to play
> well with other
> >instruments.  :)
> >
> >Does anyone know the harmonic details of English,
> Flemish, Celeste, and
> >Harp chimes? I'm ideally looking for a chart that
> plots the frequency and
> >amplitude of all the partials produced by each
> chime.
> >
> >
> >take care,
> >Glen  (who is also looking into bells and chimes,
> if you hadn't noticed.)
> 
>          -Jim
>
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> http://www.oldcrows.net/~patchell
> 
>
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> 
> 
> 


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