Chladni's Plate - Sixty Symbols

[SpikeZeek]

what if one were to reinforce the plate perpendiculer to the center of these nodal lines

[NSTartan]

@SpikeZeek

You'd create new nodal lines somewhere else.

[tomaskvapil]

wow...nature is so beautiful

[fritspas]

I'm a big particle :)

[jagara1]

This is painful to listen to!

[manaeiou]

It's better to just prove it in a vacuum.

[mccdotedu]

i would love to experiment with an apparatus like that.

[mdiem]

Well, that violated my head nice 'n proper..

ouch.

[carahert]

Just drove my dogs NUTS!

[nicktohzyu]

abit. right.

[breaneainn]

I wanna see a round plate.

[sparky99989]

My roommates were sleeping

[nicktohzyu]

@sparky99989 not anymore ;D

[hotrodmind]

hey couldn't have used some really high frequencies .. you kno like the ones that dogs can hear!!! I mean!! Ma EARS!!!!!

[1Jonman1]

Looks like Lindsay lohan's coffee table.

[SkullXII]

See the thing George did with his fingers?

Yeah.

I did that.

[genericmember1]

I share my office at University with some audio technology researchers. They're constantly making these kinds of unpleasant sounds. It's like white noise to me now, which is rather concerning.

[Capcomski]

I do regret watching this video with my headphones on.

[GoldenChantarelle]

should have used headset watching this after midnight... hope I didn't wake my neighbours...

[annettesalsman]

I think the technique demonstrated in the vuvuzela video could be put to good use on this one!

[GypDylo]

is that a carbon fibre violin?

[SonOfNye]

When I started this video the first thing I did was take cover.

[natearnett]

cymatics.

[Mojosbigstick]

I was singing along!

[Soulrider2012]

Interesting video but very annoying at the same time. Every time he reached to adjust the frequency I had to reach for my volume control.

[1000wrongdecisions]

Can the pattern be predicted?

[cptIdiot]

@1000wrongdecisions I believe that the pattern depends on frequency.

[subh1]

@1000wrongdecisions Yes, knowing the shape of the plate one can calculate both the pattens as well as the frequencies at which they will appear.

[kruelkiller]

"like those people who go dancing and sit on the sidelines, what do you call them ?" "men" .......HAHAHAHA

[aeclipseguy1]

The dog was like WTH are you watching! ha ha

[Hoogliette]

This scientist is brilliant. He is decent enough to credit other scientists and also explains things very well including also his own (significant) deductions. Thank you - Cyril Anand

[AlexKalicinski]

It would be interesting to see if you used solfeggio frequencies.

[Infidelerious]

Do the patterns get boring if you use a circular plate?

[Angaraman]

a word of warning: do NOT play this video with the volume on kind of high at three in the morning in a house with thin walls. Just got told off.

[whiterican74]

if you used a cylindrical disc would the shape be cylindrical? Just curious because I like what it show's...

[FlashFizz]

In one of my physics courses in college the professor used such a plate in a demonstration. A secretary from the nearby department office stopped by to tell him to knock it off.

[iknowmy3table]

this is very cool but I'm not sure I understand whats going on when he changes the pattern by adjusting the frequency,

I don't know much about resonance and vibration but I thought that objects only have one frequency where they start the start to resonate

[puncheex]

@iknowmy3table: The table, like any excited object, has a resonant frequency which is defined by the springiness and the mass of the plate. When excited at the resonant freq the plate vibrates especially hard. Moving the freq away from that, up or down, causes the plate not to vibrate so hard.

But there isn't just one resonant freq, there are others; each one tunes to a specific bending pattern of the plate in two dimensions, so the patterns created by the powder change with the frequency.

[GamingIs4life]

this sounds so much better than justin bieber

[PartVIII]

i love this guy so much

[MrOldprof]

@PartVIII

You can't have me: my wife loves me too much!

[ElveeKaye]

Urrrrrrrrrrrrgh my ears. >.<

[tsuikjoshiomatsu]

my ipod exploded. Thanks

[leksious]

Nice! If there only was a way to demonstrate that on 3d! Patterns remind me of atomic orbitals.. Would be interesting to see matematical formulation of the chladni plate phenomena and what kind of space and frequenzies it takes to create patterns like those orbitals.

[RectumPilum]

You said the little particles were sucket into the hole. If you had my physics teacher you'd fail the exam.

[MrOldprof]

@RectumPilum

Don't worry what I said, just look at what happens: the larger particles go to places where the plate is stationary called nodes (short for no displacement); the smaller particles go elsewhere and form piles, an effect called Faraday piling. Do not always believe everything a teacher says---that applies to what I say as well, for I may mispeak. Instead , do experiments to find out what really happens.

[RectumPilum]

@MrOldprof no it's not that. The thing is, the particles don't get sucked down, they get pushed down.

[MrOldprof]

@RectumPilum Well I agree: there's a pressure gradient across the pile of particles given by Darcy's Law (symbol kappa which Brady didn't want to use) which leads to the air flow that keeps the pile together. Whether the particles are sucked down or pushed down is two different ways of saying that there is a pressure gradient across the pile.

[RectumPilum]

@MrOldprof yes, but (according to my physics teacher) saying they're sucked down is incorrect. Just like if you suck all the air out of a sealed vial, then connect a tube from that vial to a bowl filled with water. The water then appears to get "sucked" into the vial, but it's actually the air outside that's pushing the water in front of it on it's way to the empty wagon. Unfortunatly it has to push all the other passengers in front so when it get's there all the seats are taken.

[Doomside]

Ow. Had my headphones on a bit loud at the start...

[Vennificus]

you guys must love to hear this.

THAT IS SO COOL

[Leiflton]

hey could you guys do freqency 666 on a chladni plate?

[RectumPilum]

@Leiflton that'll be done on the 21/12/12.

[drax325]

Does anyone suppose that the flexibility of the metal would change the node distances?

[wladwlad]

god, ever heard of audio compression? other than that the whole series is awesome :)

[jasmith101]

I must say, I am rather impressed...

I am curious though, does the shape of the plate have an effect on the patterns generated if they are oscillated at the same frequency?

And, does the effect still function at ultrasonic frequencies? This could be used/experimented with for kinetic "Art" if it wasn't for that howl...

[jimmyy1992]

maus at 16 :p

[craigdatiga]

Pause at :15

[EvieGurl6]

That is so cool!

[12gaugebleachdrinker]

I've seen videos for music based of the Chladni plate principle. The video had rice on massive plates making shapes from certain notes/beats. very cool.

I heard that salt water can be lit on fire if vibrated at the correct frequency.

[Grundalizer]

If you pump enough radiation through it at the right frequency the water breaks down into hydrogen and oxygen gas which you can then ignite. I've seen a video on here of it somewhere.

[NODAMEmelody]

Very interesting effect! I learn so much from these videos :)

[IAmRodyle]

man, i had to adjust my volume so many times during this video :P

[number0IX]

@IAmRodyle same here

[PhantasyStarOST]

If it's possible, please make a video about neutron/proton decay. Very interesting and not widely discussed topic, I guess.

[ummacles]

Very good explanation. If only this had been done at several higher frequencies; the patterns become so much more elaborate and striking.

[HLSDK]

♫♪♫♪♪♫♪♫♪♪♫♪♫♪♪♫♪♫♪♪♫♪♫♪♪♫♪♫♪♪­♫♪♫♪♪♫♪♫♪♪

[leporidus]

Ah, I get it! The eighth note (quaver) is the symbol for this video!

(-:

[goldliquid]

very interesting =p

[criggster]

Awesome. I knew about the effect with medium sized particles but not with the small particles. It's cool how they all form little piles.

[Weyyyyyy99]

men, lol

[Incuby]

2:34 looks like a WW2 flag

[St00sh13]

So, is there an "optimal" size of particle that neither rests in the quiescent parts nor gathers where the air rushes in?

[polonium9]

those things are amazing

[astrojunkey]

Nice one

[unomiel]

The noise was a bit unbearable, but the science was cool.

[solomsolomol]

i once saw this really high tech gadget ,called a volume controller i think ,and with it you can actually turn your speakers volume up and down ,too bad it's still not available for consumers :)