Resonance & Rice

blueerica · 06-29-2006, 02:26 PM

Only word that comes to mind is "WOW"...

Not Afraid · 06-29-2006, 02:40 PM

That scared the hell out of Buster.

Ghoulish Delight · 06-29-2006, 02:56 PM

That's one of my favorite videos ever. Science rules.

Shoot, there was another similar video that went around some time back, but I can't remember what it was exactly. Some material that acted weird at different ressonant frequencies. Damn.

Alex · 06-29-2006, 03:33 PM

It is a cool video but is calling it a demonstration of resonace correct?

This is just a visualizing of the points of high and low vibration on the speaker surface and has nothing to do with matching the vibration of the sound to the natural vibrations of the rice. This is the equivelant of using iron shavings to visualize a changing magnetic field.

But the relevant physics classes are well behind me so maybe I'm misremembering.

Ghoulish Delight · 06-29-2006, 03:39 PM

The resonance in this case would be the resonance with board that's sitting atop the speaker. The rice aligns with the resonance patterns there. At least, that's my semi-educated interpretation.

Alex · 06-29-2006, 04:00 PM

Here is my understanding of resonance:

Resonance is when the frequency of one thing matches the natural frequency of another allowing for a much greater transfer of energy from one to the other.

To my understanding that demonstration is not of two vibrations in synch but rather simply (though still coolly) a visualization of the vibration of just one thing, the vibration of the soundwaves as they pass through the board.

I have no problm accepting that I'm probably wrong. Just trying to piece together why.

Ghoulish Delight · 06-29-2006, 04:10 PM

But notice how it's not a smooth transition from one pattern to another? I believe that's a result of the reaction of the board to different resonant frequencies. You see the rice snap into a very defined pattern, and then it drifts away from that pattern, and then snaps into another pattern. That looks to me like a demonstration that the board is resonating in characteristic patterns at certain frequencies.

Alex · 06-29-2006, 04:17 PM

Probably, but I saw it as the acoustics of the underlying sound chamber producing different patterns of interference in the surface.

Ghoulish Delight · 06-29-2006, 04:21 PM

Quote:

Originally Posted by Alex Stroup

Probably, but I saw it as the acoustics of the underlying sound chamber producing different patterns of interference in the surface.

Yeah, could be that too. *shrug*

CoasterMatt · 06-29-2006, 04:30 PM

I wanna see the effects of resonance and mashed potatoes

06-29-2006, 02:26 PM	#1
blueerica Nueve Join Date: Jan 2005 Posts: 6,497	Resonance & Rice Only word that comes to mind is "WOW"... __________________ Tomorrow is the day for you and me
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06-29-2006, 02:40 PM	#2
Not Afraid HI! Join Date: Jan 2005 Posts: 17,108	That scared the hell out of Buster.
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06-29-2006, 02:56 PM	#3
Ghoulish Delight I Floop the Pig Join Date: Jan 2005 Location: Alternative Swankstyle Posts: 19,348	That's one of my favorite videos ever. Science rules. Shoot, there was another similar video that went around some time back, but I can't remember what it was exactly. Some material that acted weird at different ressonant frequencies. Damn. __________________ 'He who receives an idea from me, receives instruction himself without lessening mine; as he who lights his taper at mine, receives light without darkening me.' -TJ
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06-29-2006, 03:33 PM	#4
Alex . Join Date: Feb 2005 Posts: 13,354	It is a cool video but is calling it a demonstration of resonace correct? This is just a visualizing of the points of high and low vibration on the speaker surface and has nothing to do with matching the vibration of the sound to the natural vibrations of the rice. This is the equivelant of using iron shavings to visualize a changing magnetic field. But the relevant physics classes are well behind me so maybe I'm misremembering.
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06-29-2006, 03:39 PM	#5
Ghoulish Delight I Floop the Pig Join Date: Jan 2005 Location: Alternative Swankstyle Posts: 19,348	The resonance in this case would be the resonance with board that's sitting atop the speaker. The rice aligns with the resonance patterns there. At least, that's my semi-educated interpretation. __________________ 'He who receives an idea from me, receives instruction himself without lessening mine; as he who lights his taper at mine, receives light without darkening me.' -TJ
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06-29-2006, 04:00 PM	#6
Alex . Join Date: Feb 2005 Posts: 13,354	Here is my understanding of resonance: Resonance is when the frequency of one thing matches the natural frequency of another allowing for a much greater transfer of energy from one to the other. To my understanding that demonstration is not of two vibrations in synch but rather simply (though still coolly) a visualization of the vibration of just one thing, the vibration of the soundwaves as they pass through the board. I have no problm accepting that I'm probably wrong. Just trying to piece together why.
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06-29-2006, 04:10 PM	#7
Ghoulish Delight I Floop the Pig Join Date: Jan 2005 Location: Alternative Swankstyle Posts: 19,348	But notice how it's not a smooth transition from one pattern to another? I believe that's a result of the reaction of the board to different resonant frequencies. You see the rice snap into a very defined pattern, and then it drifts away from that pattern, and then snaps into another pattern. That looks to me like a demonstration that the board is resonating in characteristic patterns at certain frequencies. __________________ 'He who receives an idea from me, receives instruction himself without lessening mine; as he who lights his taper at mine, receives light without darkening me.' -TJ
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06-29-2006, 04:17 PM	#8
Alex . Join Date: Feb 2005 Posts: 13,354	Probably, but I saw it as the acoustics of the underlying sound chamber producing different patterns of interference in the surface.
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06-29-2006, 04:30 PM	#10
CoasterMatt BRAAAAAAAINS! Join Date: Jan 2005 Location: One Step Beyond... Posts: 8,802	I wanna see the effects of resonance and mashed potatoes __________________ Do you like my photography? Visit photosbymatt.tumblr.com to purchase prints!
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