Chladni Patterns on a Square Plate

[neglectoid]

fuk!!! that hurts my ears!!

[christine4xoxo]

do you put the plate right onto the speake?

[nikkkaforum]

please, could anyone tell me if i should put a plate DIRECTLY on the speaker?

[bunu230]

wher e can i buy the plates?

[pidromonz]

this is outstanding

we can't see sound, although it can be clearly seen that sound takes physical shape through water or salt/sand , etc

so us being 70% water, it influences our lives

it can be malevolent or benevolent

[smokyPR0]

can u tell us step by step how and what did you use to make this experiment?

[karljunjie]

what d you call to that plat form??

[8osiris]

But what is the shape for each freq? 174, 285, 396 ect. What shape do these freq make. 

[yugenro]

While the visual is nice and interesting, I am really interested in the SOUND aspect... are these vibrations just out of human hearing range? Or is there some other reason for the silence?

[drdanku]

The reason for the silence is that I recorded this movie with an older digital camera that did not have a microphone. The range of frequencies for this particular set of patterns runs from about 100 Hz to about 5,000 Hz.

[G0thKyd]

@yugenro dude, you don't need sound to make resonance.

[mariaealvarez]

@yugenro the video is just muted

[shmeet]

I tracked down the original video "Cymatics" (VHS) in the early 90's. As far as i recall they used a Quartz Crystal Oscillation rig. Just google "Quartz Crystal Oscillators". Doing it with the violin bow is fun, but the "Quartz Crystal Oscillators" are the best.

[Grundalizer]

Do you think putting a baking sheet on a speaker would work?

[apeek7]

Have you considered real time, stroboscopic holographic interferometry? I performed it both with a round plate and with a violin... You will get not only visual amplitude information but also visual phase information...

[drdanku]

yes - used holographic interferometry quite a bit while in grad school to look at guitars, snare drums, wine glasses, etc. More recently, we've used it to explore the vibration of golf club heads, car doors, automobile transmissions, as well as more musical instruments.

[apeek7]

I am not referring to time average interferometry or double exposure interferometry but real time, stroboscopic, holographic interferometry? The fringes slowly move if the strobe frequency is a hertz or two different from the vibration frequency

[drdanku]

Yup - we've done that also. But, unfortunately don't have any recent video. I think I have some older video of real time stroboscopic holographic interferometry of a standing sound wave in a rectangular waveguide. I'll have to see if I can convert it from vhs to digital and post it.

[spacemankelly]

Does anyone have any java code on creating chladni patterns,particularly to work through processing open source

Cheers

[marsCubed]

I wish someone would make this in 3d using two liquids of similar density.

There patterns we see are fascinating but one gets a sense that we are only seeing a part of the structure.

[ziziva]

The cross-section is good, though, because there are no layers blocking the view. What kinds of liquids could you use?

[marsCubed]

I get that that a 2d view has a great value, it seems odd though that materials such as ferro fluid, nano particles, and other exotic substances aren't being examined under the influence of sound. Magnetic fields could also perhaps be employed. There must me a host of transparent mineral oils with requisite properties, various dyes and inks could be added as required..

or interactions of phonons.

[zeldarooles]

I remember learning about this in physics...

[ActiveStorage]

and what did u learn?

[zeldarooles]

nodes and antinodes

[tenzle]

miracle of nature, but somebody could make a totally marketable toy out of this

[shoashoashoa]

Hi,

I've been looking for a video about cymatics that shows the OM sound being produced on Sand particles, would you hapen to know where I might find that? Thanks, Shoa.

[Salpeme1]

ooo the hidden force of sound, jaja how do you make the plate, what do i need?, or where can i get one?

[MALOJBADBOY]

NICE 5+ :-)

[salmarrr]

when i watch this, i imagine those shapes made in a crop fields. people or aliens who made those shapes, now could use a better, and easier method to create them! just to put some strong amplifier and play the music! hahahaha lol i donno! xD

[Ecca00]

hello, i was wondering what material you used for the square plate and what watt the cone was? I am currently experimenting with this myself for my grad show and any bits of info would be muchly apreciated. Thankss

[peterandrewpatrickjo]

?what material?its a plate!

[Ecca00]

<< a huh... a ceramic plate...and iron plate..a steel plate. Not all materials will have the same effect. Which is why i asked.

[peterandrewpatrickjo]

not all projects have to use a certain plate, ive done this ,milllions of times at all my friends houses using any plate, im srry if i wasnt clear by sayin it was a plate, but yea, it really does not matter

[Ecca00]

oh ok, no harm done, i just dont know and dont wanna spend money on something that isnt gonna work as well as something else.

[peterandrewpatrickjo]

ok then

[chrestien83]

Different shaped plates will produce different variations of the sound waves because of how the plate distributes the vibrations.. the same is true of the materials used to make a plate. You can pull a piece of cellophane tightly over a plastic cup and yell at it, but you might be sacrificing the quality of your experiment. If this is for a grad show and not a "friends house" I would suggest looking into it a bit more.

[guryx]

with sound it be better !

[brokenbeep]

maybe, but the sounds used are rarely interesting, normally just a sine wave, would have been good to have the option to turn the volume down though! Good vid!

[miketkong]

I agree. A lot of information could be gathered from the sound data like the frequency intervals between when the patterns form...I'd like to know if they're halves, quarters, octaves, fifths, or what...

[ladyfigurecortex]

Sorry to harp on but you can also set up a room mode using the same equitation and then if you wander round the room you'll only be able to hear it in certain places. There will be loads of boosts and cuts... yada yada yada blaaaah

[ladyfigurecortex]

The material isn't all that important but funkytoast makes a very good point that it should have an even density through out. You need something with a bit of give, any flexible metal. It needs to be able to resonant, 'cause thats what you're doing: finding resonant frequencies. You could of course use a bit of maths and then you wouldn't have to cycle through the frequency spectrum... but the maths are a bit sinister. f=C/2√(P/L)^2+(Q/W)^2+(R/H)^2.­..... It's your call haha

[equilabrista]

thats fabulous... you're a genius! xx

[LiaXmarie16X]

its amazing how many patterns are made by diffrent pitches of vibrations. Its rerly cool. i want to try it lol

[xonahuia]

what does Chladni mean?

[Neckerz]

eheh, it doesn't mean nothing! It's the surname of a german physicist and musician that studied this phenomena, Ernst Chladni.

Bye bye!

[TheFourthDrake]

hey thanks ^_^

I was wondering that myself =D

[SGOvDorg]

Ernst Florens Friedrich Chladni (30 November 1756--3 April 1827) was a German physicist.

Wikipedia article about this pattern with images and links:

de. wikipedia. org /wiki/ Chladnische_Klangfigur

[zomaa777]

Patterns are best understood to the spectrum of sound...frequency of life...

[funkytoastbread]

For anyone who would like to reproduce this: you'll need either a mechanical vibrating drive (preferably one with a controllable frequency) or a string-instrument bow. The bow hair will probably snap, so don't go using anything really expensive.

Attach the center of the plate to the drive and mess around with the frequency of the vibration pulse.

[nancychicha]

I downloaded a program wich is supposed to work in this experiment, but my problem is that I dont know if I need an especific material for the plate...

[funkytoastbread]

aluminum works best, and I think is used most, because its structure is relatively even throughout. Then again, you can try other materials (wood?) and see how they match up to other results.

[shmeet]

the violin bow won't produce any complex patterns like the video. mostly star shaped patterns. still cool though.

[ladyfigurecortex]

Another problem with using something like a violin is that you're producing complex waves, possibly similar to a sawtooth. Best way to do this is to use something that can produce pure sine waves. All energy at one frequency.

[psychofish25]

would i get the same results by simply propping a metal square on a speaker?

[FreeMindSociety]

If anyone tries this out,.. Try the same frequencies on different shaped plates,.. there are 2 elements dictating the final form of the patterns if i look at the vids well. Might be interestig.

[Fonk04]

I tried to do this today too, didn't knew how though. We took a metal plate (bended the edges since it was fairly thin which caused it to bend)and placed it on a few sticks (which didn;t vibrate) and placed a speaker directly below it. Didn't get good results but placing the plate directly on the speaker gave better results though.

Still doesn't work fine and still trying to find out how to do this.

[BavarianSnack]

Oh franks! I'm doing this for my science fair project and I need to build one of these, fast. We have a random tone generator lying around (don't ask why), but I can't figure out what I need in terms of a speaker or metal bar! I know finding the plate is going to be fairly easy if I can figure out where sheet metal is cut. Can someone help? Please? The worst part is that there isn't a Sonic Drive-In within a 300 mile radius of my house. HELP ME!

[trumpetfish1]

any information on how to make pad out of my own would be most helpful.

[sjwimmel]

sure, what you need is a plate as flat and perfectly square as possible.

Then you need to make a small metal bar of some kind vibrate vertically in the frequency you need. For that you will need a tone-generator (sends out pulses of electricity at the frequency you want.) and a vibration generator (could be a speaker with a metal bar in the middle.)

To get both of those you should probably contact a university or other school.

Good luck!

[trumpetfish1]

i have a HUGE subwoofer that i've been planning on using. finding a metal plate has been rather difficult, but do you think it would be effective to connect the plate directly to the subwoofer, or to try to get the sub to vibrate a metal bar. Preferably, i want to use a circular pad. wdoes your bar model only work with a square plate?

[sjwimmel]

the shape doesn't matter. You do, however, have to use a metal bar, and put it exactly in the gravital center (is 'gravital' a word?) of your plate.

Ow, and by the way, not to spoil your fun, but I 've tried circles, and they're pretty boring. simple predictable forms.

[trumpetfish1]

but ive seen the circular patterns and i think they are much more amazing than the square! i think its a more natural pattern too. ..a thing of preference?

thanks for the info, when i get a plate, ill try the bar idea using a sturdy clamp in the hole in my sub. I hope this will stimulate a bar enough to have an effect.

[trumpetfish1]

is the cymatics pad in this video constructed with a bar in the center? i cant tell.

[dludwigs]

I work with Dr. Dan at KU, the guy who made this video. You don't need a perfect square to do this--Chladni, for whom the technique is named, used it on violin plates. If you use your subwoofer, you'll drive the entire surface uniformly, but there are ways around that (enclose the sub except for a hole, which sits above a corner of the plate). For a tone generator, check out freeware such as Audacity audio editor; these usually have a sine generator or pure tone generator.

[dommyt44]

wat the fuck is happening here

anyone wanna enlighten me?

[LeeTheScribe]

read the description.

[Britto4789]

The salt moves to the parts of the plate that aren't vibrating. the patterns they form correspond to the frequency. each pattern is actually representative of a different orbital in atoms.

[sjwimmel]

really? I just thought the proporion f~2m+n was just a really common proportion in physics. Just coincidence.

Can you please explain (prove) why that's true? I'm not saying it isn't, just curious.

[Britto4789]

I'm not sure exactly, but we watched a video in chemistry. When you get a certain frequency, it responds to the electron orbitals of s, p, d, f g, and so on. It has to do with the space that the electrons occupy. where the salt is, is the nodes in the sand. I'm sure there's a reason having to do with physics but I'm a chem kinda person and we learned it that week in chemistry (quantum mechanics stuff)

[xXKariBananaXx]

I'd like to see those patterns matched to music. That would be incredible.

[TheRasD]

magic is only science.

[nusakara]

in this case the science of all (sub)molecules and beyond..yes we are all just matter that is merely energy condensed to a slow vibration; >> thank u Bill hicks

[stancruse]

Badass!