Chladni Patterns on a Square Plate

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Chladni Sound Standing Vibration Waves
drdanku
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    drdanku
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  • Added: 08-May-07

When sand is sprinkled on a vibrating square plate and the plate is excited at one of its resonance frequencies, the sand collects at the "nodes" and forms pretty symmetric patterns

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Comments on

Chladni Patterns on a Square Plate

15 Comments | Add Comment
  • hey thanks ^_^ I ...

    hey thanks ^_^

    I was wondering that myself =D

    By TheFourthDrake [Affiliate User] 1213068112 Reply Spam Moderate Up Moderate Down
  • eheh, it doesn't ...

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

    By Neckerz [Affiliate User] 1212733493 Reply Spam Moderate Up Moderate Down
  • what does Chladni ...

    what does Chladni mean?

    By xonahuia [Affiliate User] 1211736055 Reply Spam Moderate Up Moderate Down
  • Patterns are best ...

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

    By zomaa777 [Affiliate User] 1211449400 Reply Spam Moderate Up Moderate Down
  • the violin bow ...

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

    By shmeet [Affiliate User] 1211396765 Reply Spam Moderate Up Moderate Down
  • aluminum works best ...

    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.

    By funkytoastbread [Affiliate User] 1210516290 Reply Spam Moderate Up Moderate Down
  • I downloaded a ...

    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...

    By nancychicha [Affiliate User] 1210363908 Reply Spam Moderate Up Moderate Down
  • For anyone who ...

    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.

    By funkytoastbread [Affiliate User] 1208889262 Reply Spam Moderate Up Moderate Down
  • would i get the ...

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

    By psychofish25 [Affiliate User] 1208593791 Reply Spam Moderate Up Moderate Down
  • If anyone tries ...

    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.

    By FreeMindSociety [Affiliate User] 1206746370 Reply Spam Moderate Up Moderate Down
  • I tried to do this ...

    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.

    By Fonk04 [Affiliate User] 1205846019 Reply Spam Moderate Up Moderate Down
  • Oh franks! I'm ...

    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!

    By BavarianSnack [Affiliate User] 1203794518 Reply Spam Moderate Up Moderate Down
  • I work with Dr. Dan ...

    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.

    By dludwigs [Affiliate User] 1203630448 Reply Spam Moderate Up Moderate Down
  • is the cymatics pad ...

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

    By trumpetfish1 [Affiliate User] 1203155074 Reply Spam Moderate Up Moderate Down
  • but ive seen the ...

    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.

    By trumpetfish1 [Affiliate User] 1203101723 Reply Spam Moderate Up Moderate Down
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