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[Physltest] [Phys-L] Re: 'Seeing' frequencies above 30-40Hz (fwd)



1. Rub the edge of a file card over the teeth of a picket comb.
The speed of the card movement will correlate with the pitch
of the sound created.


-- Brian Whatcott <betwys1@SBCGLOBAL.NET> wrote:
At 12:05 PM 1/12/2005, you wrote:
Hi,
"...changing the rate of vibration can vary the pitch of a
sound."
///
Does anyone have a low-budget activity in which one can experience
the relationship between rate of vibration and pitch?

Thanks!
Mark Lucas


I visualized a metal strip, perhaps end-loaded, so that at full length,
it oscillates at just a few Hertz, but when a stopper is run up its
length to shorten it, the strip might blur visually but become audible.

The inference might be straight-forward?


Brian Whatcott Altus OK Eureka!
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