If you have pets, watch with the audio turned down.

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We've all heard of "muddy" tone.  What about sand?

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I think what you're seeing is not fractals, but the interference pattern on a resonant plate, attached to, or being subject to, a transducer.

I sort of remember doing that back in high school physics.  What you're seeing is literally the harmonics of the resonant frequency of the plate as they interact with the frequency of the transducer... all very interesting stuff for the long hair DC thermionic amplifier design crowd, with no doubt.
 
Very cool. I like how the patterns just snap into place from one to the next. Pretty!
 
Not only pets, people wearing hearing aids too.......ouch. Great looking patterns.
 
line6man said:
Naturally occurring fractals?

Is that real?

Real of course, and not fractals.

Sonic waves propagation and the standing wave nodes create visual figures from the sand, depend of the sound frequency.
 
This might be interesting for VA's computer/school project. 

Run some music though a computer model of this, and see what happens...
 
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