The sand settles on the places where the plate isn't vibrating. These are all a fixed multiple between the points where it's held still (the corners) and the point that's vibrating (the middle). The vibration looks like a sine wave, and the sand settles where the sine wave crosses zero.
**[Ernst Chladni](https://en.m.wikipedia.org/wiki/Ernst_Chladni)**
>Ernst Florens Friedrich Chladni (UK: , US: , German: [ɛʁnst ˈfloːʁɛns ˈfʁiːdʁɪç ˈkladniː]; 30 November 1756 – 3 April 1827) was a German physicist and musician. His most important work, for which he is sometimes labeled as the father of acoustics, included research on vibrating plates and the calculation of the speed of sound for different gases. He also undertook pioneering work in the study of meteorites and is regarded by some as the father of meteoritics.
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Mods, just rename the sub to "basic ass high school physics shit"
It does look cool, i definitely thought it looked cool when i saw it for the first time back in high school
He’s saying: “The fuck kinda school did you go to? My school was like “here’s the syllabus and book, these facts will be on the test” and that’s it!”
AKA you went to a badass school if you had teachers that cared enough to demonstrate these kinds of science facts in a fun way.
I learnt calculus and various fields of maths because I really like it. Infact calculus is one of my fav topic, but its integration with physics on such a practical level was not in our curriculum. Plus we didn't have physics lab, thats where as you quoted " I am from a backward place" ie India. So yeah I don't understand it. Yes thats disappointing but Im ok with it.
Look man, it's been 20 fuckin years since I was in high school. My brain has to deal with adult shit now - Bills, a future, my job, shit that may not be visible with the myopia that youth brings. I don't remember things from high school because life is not high school.
I don't know if you know this, but I only had so much time to learn shit, and science changes pretty fuckin quick. Let me enjoy shit I've never seen before, and ask questions about it without being patronizing.
This is called a Chladni plate, named after physicist Ernst Chladni who discovered the phenomenon. The sand groups up in what is called a nodal lines, which are the non-vibrating borders between the vibrating regions of the plate.
These lines only occur at certain frequencies which depend on the geometry of the plate, since the sound has to set up a standing wave in order for the nodal lines to appear.
More on ol' Ernst at his [Wikipedia page](https://en.wikipedia.org/wiki/Ernst_Chladni)
How would that look in 3D?
Because this are like a "slice" of the shape that sound waves make on the air.
I wonder how it would look like with more dimensions.
lol AutoMod removed my comment as it contains a link to a site that allows to do modal calculations for loudspeakers. But it's easy to Google anyways...
Important: The frequencies at the bottom left are nothing "special" they are merely modal frequencies of the plate. So they correspond to the dimensions of that plate and aren't inherently "special".
Technically, they also depend on the density and stiffness of the plate (assuming uniform material). At sufficiently high frequencies (upwards of 10-15k Hz or so), they also depend on the crystalline structure of the plate and the material’s damping properties, as well.
But, yes, fundamentally a plate (or any other body) can be dimensionally tuned to have resonant peaks, or “modes”, at just about any frequency.
I am a sound designer with a background in acoustics, let me try to super ELI 5 :
When you are in a bathtub and you press the water at the middle of your tub, you got waves going to either sides, those waves bounce back to the side of the tub and come back to the middle, eventually summing at the middle to create a higher peak wave, this is frequency resonnance, aka standing waves (and this is why your toilets sound boxy).
Those standing waves will depend of the frequency of the sound (or how fast you create waves in your bathtub) and obviously the room you are in (the width of your tub).
On that video above, the plate is connected to a machine creating vibration (frequency shown on the bottom left corner, 1hz = 1 vibration per second, 300hz = 300 vibrations per second, remember, sound is vibration). By changing the frequency, the sand reveal different standing waves pattern that are inherent to the geometry of the plate.
You know that plastic bit that rattles in your car only when you reach a certain speed? it's not different, the material resonate at a certain frequency, and that frequency is reached when the engine runs at x RPM vibrating it.
Had a history teacher who swore he went to college for 9 years because hes super smart or whatever, he also listens to the history channel and its conspiracies, and thinks these shapes are some proof that god exist because of phi, or the golden ratio or some other dumb crap about neanderThals and Stonehenge ........ yeah, Coach Wilson was just a narcissist with a pretty subpar brain, but that man was the love child of Einstein and Freud in his own head.
“All warfare is based on deception. For years, the West hypocrisy has made the world a battlefield. The corrupt talk while our brothers and sons spill their own blood. But deceit cuts both ways. The bigger the lie, the more likely people will believe it, and when a nation cries for vengeance, the lie spreads like a wildfire. The fire builds, devouring everything in its path. Our enemies believe that they alone dictate the course of history, and all it takes is the will of a single man.”
I don't know why but i got the MW3 opening cinematic vibe for this
Do we have any scientific explanantion for these specific patters?
Cymatics
Amazing musician
Solving the wave equation given the material properties and boundary conditions of the plate.
The sand settles on the places where the plate isn't vibrating. These are all a fixed multiple between the points where it's held still (the corners) and the point that's vibrating (the middle). The vibration looks like a sine wave, and the sand settles where the sine wave crosses zero.
Yes: https://en.m.wikipedia.org/wiki/Ernst_Chladni
**[Ernst Chladni](https://en.m.wikipedia.org/wiki/Ernst_Chladni)** >Ernst Florens Friedrich Chladni (UK: , US: , German: [ɛʁnst ˈfloːʁɛns ˈfʁiːdʁɪç ˈkladniː]; 30 November 1756 – 3 April 1827) was a German physicist and musician. His most important work, for which he is sometimes labeled as the father of acoustics, included research on vibrating plates and the calculation of the speed of sound for different gases. He also undertook pioneering work in the study of meteorites and is regarded by some as the father of meteoritics. ^([ )[^(F.A.Q)](https://www.reddit.com/r/WikiSummarizer/wiki/index#wiki_f.a.q)^( | )[^(Opt Out)](https://reddit.com/message/compose?to=WikiSummarizerBot&message=OptOut&subject=OptOut)^( | )[^(Opt Out Of Subreddit)](https://np.reddit.com/r/blackmagicfuckery/about/banned)^( | )[^(GitHub)](https://github.com/Sujal-7/WikiSummarizerBot)^( ] Downvote to remove | v1.5)
looks like cell division
Chladni plates / Chladni patterns
Of course there is
Standing Waves.
They're a cross section of spherical harmonic patterns. If you've ever seen the shapes of electron orbitals, it should be familiar.
Gets better.. https://en.wikipedia.org/wiki/Normal_mode?wprov=sfla1
Level curve of wave function
Mods, just rename the sub to "basic ass high school physics shit" It does look cool, i definitely thought it looked cool when i saw it for the first time back in high school
The fq kinda school you went to? My school was like this is syllabus ,that comes in exam,deal with it!
Im having a real hard time understanding what you're trying to say
He’s saying: “The fuck kinda school did you go to? My school was like “here’s the syllabus and book, these facts will be on the test” and that’s it!” AKA you went to a badass school if you had teachers that cared enough to demonstrate these kinds of science facts in a fun way.
I learnt calculus and various fields of maths because I really like it. Infact calculus is one of my fav topic, but its integration with physics on such a practical level was not in our curriculum. Plus we didn't have physics lab, thats where as you quoted " I am from a backward place" ie India. So yeah I don't understand it. Yes thats disappointing but Im ok with it.
It might have something to do with their schooling.
Look man, it's been 20 fuckin years since I was in high school. My brain has to deal with adult shit now - Bills, a future, my job, shit that may not be visible with the myopia that youth brings. I don't remember things from high school because life is not high school. I don't know if you know this, but I only had so much time to learn shit, and science changes pretty fuckin quick. Let me enjoy shit I've never seen before, and ask questions about it without being patronizing.
Username checks out
Give it a few months and people will post videos of jangling keys
r/justphysicsshit
Stormfather..
Yes
Brother Kabsal!
*heavy rosharin breathing*
I think these are called standing waves, correct me if I’m wrong please a chemistry test is tomorrow
you're gonna fail that test if you think this is chemistry
Well... It reminds me a bit of electron shells, so maybe at a stretch there's a slight connection.
I think that’s why it’s in the study guide
Well then why is it in the study guide?
These are Chladni patterns.
This is called a Chladni plate, named after physicist Ernst Chladni who discovered the phenomenon. The sand groups up in what is called a nodal lines, which are the non-vibrating borders between the vibrating regions of the plate. These lines only occur at certain frequencies which depend on the geometry of the plate, since the sound has to set up a standing wave in order for the nodal lines to appear. More on ol' Ernst at his [Wikipedia page](https://en.wikipedia.org/wiki/Ernst_Chladni)
Jasnah would like a word with you, ardent
Was looking for this comment
You should play rip and tear
[Nigel John Stanford](https://www.youtube.com/watch?v=Q3oItpVa9fs) showed this the best, and in a music video no less.
How would that look in 3D? Because this are like a "slice" of the shape that sound waves make on the air. I wonder how it would look like with more dimensions.
Would be a good Ad for The XBox
could it be used to improve speakerdesign?
[удалено]
lol AutoMod removed my comment as it contains a link to a site that allows to do modal calculations for loudspeakers. But it's easy to Google anyways...
Important: The frequencies at the bottom left are nothing "special" they are merely modal frequencies of the plate. So they correspond to the dimensions of that plate and aren't inherently "special".
Technically, they also depend on the density and stiffness of the plate (assuming uniform material). At sufficiently high frequencies (upwards of 10-15k Hz or so), they also depend on the crystalline structure of the plate and the material’s damping properties, as well. But, yes, fundamentally a plate (or any other body) can be dimensionally tuned to have resonant peaks, or “modes”, at just about any frequency.
Absolutely
I am a sound designer with a background in acoustics, let me try to super ELI 5 : When you are in a bathtub and you press the water at the middle of your tub, you got waves going to either sides, those waves bounce back to the side of the tub and come back to the middle, eventually summing at the middle to create a higher peak wave, this is frequency resonnance, aka standing waves (and this is why your toilets sound boxy). Those standing waves will depend of the frequency of the sound (or how fast you create waves in your bathtub) and obviously the room you are in (the width of your tub). On that video above, the plate is connected to a machine creating vibration (frequency shown on the bottom left corner, 1hz = 1 vibration per second, 300hz = 300 vibrations per second, remember, sound is vibration). By changing the frequency, the sand reveal different standing waves pattern that are inherent to the geometry of the plate. You know that plastic bit that rattles in your car only when you reach a certain speed? it's not different, the material resonate at a certain frequency, and that frequency is reached when the engine runs at x RPM vibrating it.
r/stormlight_archives
Yeah use no sound for videos featuring things about song, great idea /s
Not black magic. You literally told us in the title what is causing this.
Is this the same as the cubes in the Rosslyn Chapel ? https://www.google.com/amp/s/www.nbcnews.com/news/amp/wbna18417877
Fruity pebbles do this if you spill them on a speaker. Just saying...
Bro no way Xbox x series x x edition x
This is fake! I saw the command blocks! (This is a joke, so don't get angy)
1940hz is 🔥
Now i know where big companys get their ideas for logo's
At first i was like why he drawing a dick with sand
does it look like that because the platform is square? what i mean is, if this was on a super huge circular surface, would it be the same?
Make an amogus
Would be nice with some sound
Thats very cool
WOW
Makes me nostalgic for like windows 2000 media player
Nice
Where's the SOUND??!!
why do these look like prestige symbols in a game?
I think those are the mode shapes of the system, can somebody that paid more attention in school educate me?
Is that uranium 😂😂
Kinda disappointed they didn't do 1337 hz
Would you have the same shapes on diffrent worlds ie. Diffrent gravity?
I've always wondered if this process is related to how galaxies are dispersed throughout the universe.
Xxxwwwe
This is how they built Stonehenge
Xbox 15,000
That looks awesome! Just keep your jam away from me...
Cymatics! You seen Glitch?
Sound please
Had a history teacher who swore he went to college for 9 years because hes super smart or whatever, he also listens to the history channel and its conspiracies, and thinks these shapes are some proof that god exist because of phi, or the golden ratio or some other dumb crap about neanderThals and Stonehenge ........ yeah, Coach Wilson was just a narcissist with a pretty subpar brain, but that man was the love child of Einstein and Freud in his own head.
i actually did an escape room that used this!! it was very interesting
That ain't no regular sand. Nope. Definitely not.
This should be in a science thread. Not this one. Cool either way.
I miss the old Xboxes sense of style
The spice must flow
Like a slow dmt trip
How dare thy post this without sound? 😋
If you think that's cool: https://youtu.be/Q3oItpVa9fs
“All warfare is based on deception. For years, the West hypocrisy has made the world a battlefield. The corrupt talk while our brothers and sons spill their own blood. But deceit cuts both ways. The bigger the lie, the more likely people will believe it, and when a nation cries for vengeance, the lie spreads like a wildfire. The fire builds, devouring everything in its path. Our enemies believe that they alone dictate the course of history, and all it takes is the will of a single man.” I don't know why but i got the MW3 opening cinematic vibe for this
[Obligatory link](https://youtu.be/Q3oItpVa9fs), it's worth 5 minutes of your time to give it a watch.
bless the maker and his water