Old55
Interesting stuff.  I'm mildly surprised that no pattern showed up for A-440.  

What about Post #5 above?  Has to be close, ya?

This sort of reminds me of how some exotic substances allow one to see music... IIRC.
 
J

I noticed that only certain frequencies produced the patterns, BUT ..... if the plate was a different size, I suspect that the patterns would have formed at different frequencies and with different shapes at those frequencies. It was after all, a study in resonance and we know that resonance is a function of the size of the object or space.

craigb

Old55
Interesting stuff.  I'm mildly surprised that no pattern showed up for A-440.  

What about Post #5 above?  Has to be close, ya?

I guess it will have to do.  But isn't that Arse-onance?  

Old55

craigb

Old55
Interesting stuff.  I'm mildly surprised that no pattern showed up for A-440.  

What about Post #5 above?  Has to be close, ya?

I guess it will have to do.  But isn't that Arse-onance?  

I think that's called the "Ed's Head" resonance.

I've seen that many acoustic guitar builders record
the results when making the tops.
 
Also seen them sing into the sound-hole to find the
resonate pitch...the hole can be resized for changes.
 
 

Guitarhacker
I noticed that only certain frequencies produced the patterns, BUT ..... if the plate was a different size, I suspect that the patterns would have formed at different frequencies and with different shapes at those frequencies. It was after all, a study in resonance and we know that resonance is a function of the size of the object or space.

Yes ... these patterns are very cool.  I wonder if the complexity of what you are seeing arises from the overtones (at least in part)?  Are we looking at a visual presentation of the timbre of that materials being used?  It would be nice to see not only different (as you say) size and shape but different materials.