Amazing Resonance Experiment
 

This is cool.

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Here's another resonance experiment

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And don't forget the amazing washing machine resonance experiment

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As an engineer, this one always really resonated with me.

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The 1st one one is erie weird.
the rest i sort of understand...
From geometry to Egyptonic ...weird science..there is a LOT to explain in there....

Weird. The first one is the one I understand best.

The first one reminds me of cellular organelles and the alignments - always liked the idea that self-replicating molecules had to have a certain organization but knew it would be tough to get there. The frquency trick does it for me...

interesting to see the different vibration modes of a plate being excited. you see the colors on the FEA, and sometimes its hard to believe there are that many modes.

Regarding the origonal post: wouldn't the patterns be dependent upon the structure of the vibrating plate?

Best
Les

It would be interesting to see 2 different plate thicknesses side by side running at the same frequencies

You would understand it better if the back ground were uniform to the plate so you saw just how much of the white stuff was flying into the air and never landing back on the plate.

As the plate vibrates, it has areas where waves meet and cancel out each other, held to a particular frequency, these areas of the plates occur in standing consistent areas. The grains are not agitated in these areas, so they stay still, the grains outside these areas, are thrown by the movement of the plate until they end up either off the plate entirely, or in one of these wave cancellation areas.

With the advent of the "god" particle and all....I am more confused and amazed then ever!

LOL, welcome to the geek world of vibration analysis where vibration signatures are a language of their own.

Over the years I've eaned level 2 certification at Entek/rockwell/IRD, level 2 from Emerson/CSI, and level 3 from the vibration institute.
I don't know why I did that, the companies were paying for it and it sort of became a hobby that got out of hand.

I don't even use it much anymore, maybe a couple of times a month.

The visuals on the first one are cool, but it has me thinking more in the lines of new speaker technology. As an example: The media (I am guessing salt) that they are using to form the visuals gives you the different patterns on the plate (if the salt wasn't there, the patterns would still be there, just invisible). If you could apply this principal to a different type of media rather than a solid plate, lets say a material flexible that could be used for a speaker cone, Then lets say for your guitar cabinet, not only would you have your regular input for the speaker, you would have this second frequency input attached directly to the cone material that you could adjust the frequency to. It would almost work like a tens unit on one of your muscles. The higher the frequency applied to the cone the stiffer it would become. This would allow you to totally change the tone of your speaker with the turn of a knob? Sorry for the rambling...

https://www.sparkfun.com/products/10975

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That has to be the freakiest thing I have ever seen, pretty cool.