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Dream Crusher
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21,053 Posts
Physics is beautiful.
 

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Devil
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1,871 Posts
I've seen this before. Slick stuff. What I wonder if this is a physical connection to synesthesia.
 

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EFILNIKUFESIN
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1,657 Posts
Actually, it would be perfect to check guitar timber tests in that way. finding the right wood for the right application.
 

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Devil
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1,871 Posts
Anyone care to vulgarize what's happening in 2-3 sentences? :lol:
Well yuh see you got this here speaker with a piece of cardboard on it. You pour some shit on it and make the speaker play a note. That note makes a picture out of that shit by raw frequency.
 

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should really be working.
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366 Posts
I read an article about people doing this to violins back in college. That was a long time ago so I don't remember much about why it's done. But here's a vid:


I think they were trying to make strat copies, but later found out it had more to do with the finish that they used rather than the resonances and nodes of the backs. Still neat though.
 

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Theory Guy
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214 Posts
Ok, I guess that'll do. :lol:
To elaborate further, different frequencies make different overtones of the cardboard (or whatever other surface you use) resonate. These overtones have specific nodes on the resonating body, and the higher up the overtone is, the more nodes will vibrate. Think of it like a guitar string: there is only one place where you can hit the octave harmonic on any open string: at the twelfth fret. However, there are two locations for the harmonic an octave above that: the fifth fret, and the twenty-fourth fret. So, the higher up the harmonic, the more locations there are on the string where that harmonic is available.

So, if the frequency is getting higher and higher, it's making more and more nodes for any given harmonic vibrate, and the sand/salt/whatever just shows us where those nodes are.
 

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Guiterrorizer
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15,696 Posts
Wirelessly posted (HTC_Dream Mozilla/5.0 (Linux; U; Android 1.5; en-ca; Build/CUPCAKE) AppleWebKit/528.5+ (KHTML, like Gecko) Version/3.1.2 Mobile Safari/525.20.1)

I'm gonna talk to my tech friend.. hehe
 
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