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Klarinet Archive - Posting 000552.txt from 2001/02

From: Bill Hausmann <bhausmann1@-----.com>
Subj: Re: [kl] Difference Tones
Date: Thu, 15 Feb 2001 06:44:16 -0500

At 08:13 AM 2/15/2001 +0000, Tony Pay wrote:
>On Wed, 14 Feb 2001 23:46:15 -0500, bhausmann1@-----.com said:
>
> > But all the evidence is that the walls, microphone diaphragms, etc.,
> > are vibrating AT 8 HZ! This would mean that SOMETHING is producing
> > that frequency. If it is not the pipes, then what? Either these
> > objects are responding to sound waves in the air produced by the organ
> > pipes, or they are themselves creating the sound waves with their own
> > vibrations. But if that is the case, what is causing them to vibrate
> > AT THAT FREQUENCY?
>
>There's a third option other than your either/or.
>
>What causes the objects to vibrate at 8 Hz is the interaction between
>one aspect of their properties (nonlinear response to vibration), and
>the fact that they are being stimulated by two frequencies that differ
>by 8 Hz.
>
>The thing to see is that something doesn't have to be *vibrated* at a
>given frequency in order then to vibrate at that frequency.

Is this not exactly what is happening to the AIR when the two pipes are played?

Bill Hausmann bhausmann1@-----.com
451 Old Orchard Drive http://homepages.go.com/~zoot14/zoot14.html
Essexville, MI 48732 ICQ UIN 4862265

If you have to mic a saxophone, the rest of the band is TOO LOUD!

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