5:31 spray with varnish and sell to the Tate gallery for $ 6 million
@ventiladordesuco
6 жыл бұрын
a little spray would send all the sand away
@GuitarSamurai17
6 жыл бұрын
Free Saxon that would probably sell
@cvgurau
6 жыл бұрын
... boy you never really know what you're gonna get with this channel do you
@shottysteve
6 жыл бұрын
keeps it fresh u know
@alektad
6 жыл бұрын
FFT and a signal generator are scientific equipment, it just happens that phones have advanced far enough to accommodate it. 20 years ago a fast rate response FFT that fits in a pocket would have been worth considerable money. Affordability does not necessarily make things less scientific, as seen in this neat demonstration
@sycc66
6 жыл бұрын
Except that the spectrum analyzer and signal gen from a tablet are pretty much garbage as scientific pieces of equipment, so none in their right mind would consider them so.
@purplealice
6 жыл бұрын
A very long time ago, I saw a science program on TV where they took a steel plate, sprinkled it with fine sand, then used a violin bow to stroke the edge of the plate. Stroking the edge in different places produced different patterns.
@suzannep
6 жыл бұрын
That sounds really cool! I'm off to search KZitem to see if anyone has a video where they did that..
@vincentjaegers7717
6 жыл бұрын
thats the way Chladni the semi inventer of this effect tested this phenomenon
@JustinDrentlaw
6 жыл бұрын
Suzanne P check out Steve Mould's KZitem channel, he does this exact thing in one of his vids.
@Tofu524
6 жыл бұрын
Yes I experienced that in ‘real’, it’s pretty cool. ;)
@cdnsoundguy
6 жыл бұрын
Its easier to identify resonances and their associated harmonics if you view it in Spectrograph or a waterfall graph or even an FFT with averaging on. This allows you to better see the rate at which each frequency decays. You could also attach a piezo (very cheap) pickup to the surface to eliminate the losses due to the air gap between your tablet microphone and the plate. If you were to excite the plate by multiple resonances at the same time the destructive interference patterns created are amazing.
@ArchaicMuse
6 жыл бұрын
Very nice. The asymetry you're witnessing is due to the different boundary conditions on your plate (longer fixed edge on the left than on the right).
@SteveRoofer
6 жыл бұрын
I'm an amateur luthier, what you are doing is called "tap tuning" I use the same setup as you but with tea, not sand or sugar. When I got fascinated by this, I researched it and found an example of "tap tuning" using the violin bow to excite the particles, so this practice goes back hundreds of years. There is an old video on youtube ( black and white and silent) showing a bow being used to "tap tuning" a violin plate look up "American violin maker - James Reynold Carlisle" 2.40 minutes in it shows the "tap tuning." OK here is the challenge. Carve all the parts of a violin tune them and make one that like a stradstradivarius. I've been trying for years!
@SerimanTheWolf
6 жыл бұрын
Matthias, I gotta say I love the variety of subjects you cover in your videos. It's so awesome to learn about useful woodworking knowledge as well as random bits of applied science like this! Seeing stuff like this helps to re-spark the same sort of tinkering I used to do before life got so busy; if you have time to do it with household responsibilities AND kids, I surely can too. Keep doing what you do!
@jamesraney7232
6 жыл бұрын
I was just waiting for the pattern to make a picture or words. Lol kinda thought he might end it that way for a laugh. Very glad to have been watching his channel for almost two years. He has has interesting videos.
@DoresoomReviews
6 жыл бұрын
So cool, thanks for taking the time to share this! You might get even better performance if you measure the frequency with the same boundary conditions to which you're applying the forcing function (don't hold and tap, set it on the boards and tap)... aaaand then I watched the rest of the video, and that's exactly what you did after the first one.
@matthiasburger2315
6 жыл бұрын
A profound scientific approach. Physics teachers usually do this experiment with plates that are supported in the middle and get highly symmetrical patterns. It was interesting to see that the slightly assymmetrical tension in a plate with these bend edges results in assymmetrical patterns.
@audiotechlabs4650
6 жыл бұрын
Your mind works in mysterious ways! If only there were a productive way to use this info. Experiments like this is how breakthroughs in technologies are born! Leave it to you to come up with different ways to use wood strips! Ha Ha! I learn a great deal from you. Using salt was brilliant to show wave patterns. Another cool experiment would be to do the same method on ply or solid wood the determine the resonance of a given piece of wood for speaker design. Thank you for doing projects you don't normally see on KZitem. Thankz and Happy New Year!
@nathanielshawtheoverclocke7045
6 жыл бұрын
Who knew that simple baking sheets sounded so lively!!!!!
@slayerfreaked
6 жыл бұрын
Love how the nodes move depends on where you have the speaker.
@r.awilliams9815
6 жыл бұрын
Robert Hooke performed this experiment during the late 1600's using flour, a glass plate and a bow from a violin, if my memory serves me right. It's still cool to see.
@spokehedz
6 жыл бұрын
It is kind of hard to believe that the vast majority of people carry around several super-computers of 20 years ago in our pockets.
@vipero00
6 жыл бұрын
The momentum of your exciter (drum stick) can excite different modes. Your finger has little momentum so it excites higher modes. Use a heavier drum stick to excite lower modes. That's why a bass drum stick is much bigger than those for a snare. I use the soft part of my fist to ring the bollards while pumping gas.
@leandrosly
6 жыл бұрын
And this is why you are the most interesting woodworker to watch on KZitem
@dozer1642
6 жыл бұрын
I would love to be there for Mr. Wizards science hour. So many variables to play with. Can’t wait to see your kids in these types of videos. Thanks for posting!
@PiercingSight
6 жыл бұрын
This is actually far more interesting than the "perfect" patterns that we see in most videos.
@bbrazen
6 жыл бұрын
Instead of a speaker have you considered connecting a DC motor with a short arm off the shaft to the back of the pan to make the entire pan a speaker? I got the idea from Bruce Yeany who did it with paper plates and I thought it would be cool to try for standing waves.
@hey_there
6 жыл бұрын
This is really cool! I could see someone taking photos of those patterns and selling them as art. Really interesting video.
@kristhetrader5029
6 жыл бұрын
Matthias, just starting to watch the video, u need log scale for that audio spectrum analyzer to make things easier ;-)
@Traderjoe
6 жыл бұрын
What is the advantage of knowing where the nodes of vibration are for certain frequencies? What I mean is, how does it help you? The patterns are very interesting!
@MrHasenfeffer
6 жыл бұрын
I use that same spectrum analyzer app to time my drums! The device it is run on makes a big difference add far as frequency response is concerned. Different microphones I'm guessing.
@bobd.
6 жыл бұрын
What would happen if you supported the plate from the corners instead of the middle of each side? Would the pattern change? What if you suspended it from some strings so it was floating in air? Just curious what would happen. Would make a good kids science project. Thanks for sharing this Matthias.
@itaykal
6 жыл бұрын
It is important to identify the natural frequencies with the same boundary conditions as when you excite it... in other words you should give it a bang when it's in the same position as when you excite it with the speaker. otherwise the natural frequencies will not match and just maybe clamping it down on both sides would even give cleaner patterns. still that was great!
@ElektrikDunyam
6 жыл бұрын
Thanks. Very nice. I always enjoy your videos.
@Martin-bx1et
6 жыл бұрын
Maybe try switching abruptly between two or more of those frequencies to animate the patterns? The second frequency that you showed 'ringing out' had a strong harmonic so you might be able to flip between those without needing to move the speakers.
@GuitarSamurai17
6 жыл бұрын
I feel like matthias is going to make a scientific discovery at some point hahah
@piccilos
6 жыл бұрын
Alright, now write a series of tunes that draws the sand into a pictures while also sounding pleasant.
@helliviknow
6 жыл бұрын
This would be interesting to try with a stick on exciter like the Dayton Audio DAEX25. I'v experimented with sticking those to guitars and its a bunch of fun.
@benjaminjosephonelove9786
6 жыл бұрын
thats really a nice experiment there
@sebbes333
6 жыл бұрын
Another thing that can be interesting is if you run a continuously changing spectrum of all frequencies from low to hight (or opposite).
@davebashford3753
6 жыл бұрын
What do you suppose would happen if you cut the edges off of your sheet so that it was flat, and then suspended it at nodes? My guess is that you'd get a different but similar pattern, and that it would ring longer, but also make a bigger mess. Kind of a large 2-D wind chime!
@nickyj288
6 жыл бұрын
I wish you were my science/math teacher when I was in school.
@backyardbasher
6 жыл бұрын
You made a Sonic Etch a Sketch, Doctor Who would be proud of you
@kioarthurdane
6 жыл бұрын
I think I've only ever seen this demonstration in two modes: a linear oscillator is placed upward and the plate bolted to it in the center, and a static bar pointing upward bolted to the plate in a similar manner and bowed with a bowstring. It makes sense that your method also works, and for everyday metal plates in product design. However, sound is very inefficient at delivering power. Added, with the demonstration that location of the sound source not changing the shape of the pattern, only it's intensity to reveal itself, I'd like to suggest two changes: A. Attach an arm or larger foam dome to a speaker and apply physical contact to the object being observed. Apply the device at different locations and different directions. Does the pattern remain the same or merely affect the intensity? B. Remove the body of the speaker and reduce it to the coil, or simply drive a coil of wire with your amp and frequency generator. Hold the coil with the signal running near the plate. This might be more effective than the speaker housed in it's magnetic shielding and air gaps.
@kioarthurdane
6 жыл бұрын
Also, using a frequency generator that you can adjust continuously, or at least smooth-ish would be nice to discover frequency modes or superpositions of two.
@stevejohnson1685
6 жыл бұрын
Ah, Bessel functions! I knew they'd be useful at some point in my life...
@smiley235
6 жыл бұрын
This is how you communicate with aliens.
@Yusufmasron
6 жыл бұрын
Very interesting Matthias. But where is this leading to?
@E.lectricityNorth
6 жыл бұрын
What would be really neat is if you could vibrate concrete back into powder from its solid, cured state. I love this stuff.
@azgarogly
6 жыл бұрын
If you'd sacrifice one of the speakers and make a coil affect the steel plate directly, You could go with less power and higher frequencies.
@glennfelpel9785
6 жыл бұрын
It would have been really fun to see a sine sweep. That is if you can come up with something to generate the signal. They are really cool to watch, as you can see the system as it passes through the fundamental frequencies.
@mcgyverswoodshopadventures5429
6 жыл бұрын
Best announcement video I️ have seen, I️ think
@alansimons141
6 жыл бұрын
It's interesting how chaotic the modes look. If the metal was perfectly manufactured, you would think the modes would look more consistent and predictable. But inconsistencies in the metal allow these weird modes to show up.
@matthiaswandel
6 жыл бұрын
The manufacturing process involves stretching the metal, which probably accounts for some of these inconsistencies.
@jonathanhornell-kennedy4521
6 жыл бұрын
How good are your kid's science fair projects going to be, when the time comes.....10/10
@HeikoRehm
6 жыл бұрын
You could calculate the frequency by measureing the wavelength between the Sand/Salt "Dunes"
@wi11y1960
6 жыл бұрын
This is interesting and all, yet I would like to see you doing stuff in the wood fabrication area.
@intelligenceservices
6 жыл бұрын
i'd just use a sweepable frequency sine generator and lose the spectrum analyzer. the audio program Reaper has a plugin called 'tone generator' that would work. also for the high frequencies, i'd invest in a horn tweeter, being careful the amp is matched, and i suppose a simple high pass filter to negate the high energy low frequency signals before it. then i would do the cymatic experiment on black acrylic glass so the nodes wouldn't be based on irregularities in the material, and acrylic glass is safer than silica glass.
@big321danger
6 жыл бұрын
Matthias, you present some great content. Would you revisit this experiment and keep the frequency at 432 Hz? Very interested.
@sparkyprojects
6 жыл бұрын
The problem i can see with those sheets is the raised edge, that edge will resonate at a different frequency, which may counteract the main sheet freq in the harmonics, best to use a flat sheet.. Most use a direct contact transducer, probably uses less power to resonate the sheet.
@manla8397
6 жыл бұрын
Sparky Projects it does really matter because it will just have other characteristic patterns for having rims.
@alansimons141
6 жыл бұрын
Yeah, the edges are just a boundary for the resonances in the middle.
@drhfhs
6 жыл бұрын
no, the whole body has a natural frequency lol irregular shapes make interesting patterns
@RobertKreegier
6 жыл бұрын
Would using a square wave instead of sine give better results because of all the overtones?
@havenisse2009
6 жыл бұрын
Interesting how the patterns resemble sand at shallow waters, where you get a ribble pattern.
@dejavu6938
6 жыл бұрын
I think that when you devide the frequency with the number of formed zones on plate , then you will get the resonance frequency
@deserteagles948
6 жыл бұрын
Are you planning on playing with Rubens tubes in the future?
@mickelodiansurname9578
2 жыл бұрын
But, you could equally make those sounds with another piece of metal right? It doesn't need to be a speaker, it just need to produce the correct resonant frequency .... so you could make the sound mechanically right? With the right shaped piece of metal beneath the top one... maybe a metal guitar string? Can you direct the salt... say to the edge of the tray?
@ian-duh
6 жыл бұрын
Is that a piece of same dryer from which you harvested a top for the big bandsaw table?
@gabormandli7097
6 жыл бұрын
I've been watching your videos a while ago, and I'm just a little surprised that you have so many new ideas about where to experiment. Now do you work with the sounds and waves? Congratulations to! Did not Nigel John Stanford's video give you the idea? If so, what's next? After many carpentry machines, you just do not do a jukebox like Wintergatan? I look forward to newer videos and wish you a great deal more work! Keep it up! :)
@sebbes333
6 жыл бұрын
What if you use both speakers & play 2 different (resonation) notes at the same time?
@construction-productscemen4935
6 жыл бұрын
Great video!!
@abrahamdunn
6 жыл бұрын
Why did you replace the salt/sand between experiments
@jamesgrimwood1285
6 жыл бұрын
Is there a relation between the frequency and the number of "nodes"? And what about the frequency and where you hit it.
@Saareem
6 жыл бұрын
James Grimwood yes there is. More nodes on a standing wave means higher frequency.
@DavidBishopinc
6 жыл бұрын
Looks cool as most of your experiments do, but not always sure what I’m suppose to be learning. Lol.
@chrisbrucesr.9256
6 жыл бұрын
So kool! Smartest all around person on youtube!
@Papperlapappmaul
6 жыл бұрын
He's got an unfair advantage in technical stuff due to his German heritage, though. ;)
@chrisbrucesr.9256
6 жыл бұрын
swiss lol right! He's so dam smart! In all aspects lol
@iliketoUSEmybrain017
6 жыл бұрын
That and the fact he was one of the original engineers involved in the development of the Blackberry around the turn of the century........
@KarloMarxx
6 жыл бұрын
I
@mrsemifixit
6 жыл бұрын
iliketoUSEmybrain017 Was he?
@vasyapupken
6 жыл бұрын
you should try a direct contact between speaker cone and metal plate to increase amplitude. (air is bad force conductor)
@trenthamilton7532
6 жыл бұрын
Hi Matthias, the link you have at the end of the video doesn't work. The file appears to be resonance.html not plate_vibrations.html
@jamest.5001
6 жыл бұрын
you can rebuild the speaker. wind a new coil. or do something else with it.
@petercollin5670
6 жыл бұрын
I found it interesting that you had to go to a more powerful speaker to do the higher frequencies. Because among electric guitars, a bass guitar amplifier has to be twice the wattage of a regular 6 string guitar amplifier to achieve the same house-rocking volume.
@freezEware
6 жыл бұрын
lol that is only because, the element is needed to be bigger to play lower frequencies accurately.
@AnarchistMetalhead
6 жыл бұрын
volume is roughly equivalent to sound energy times a human specific adjustment curve, while a sound of higher frequency has less amplitude than a low frequency sound of the same energy, and amplitude is needed for moving grains
@manla8397
6 жыл бұрын
You should try using a special speaker called “vibration speaker “.
@notofinterest
6 жыл бұрын
Instead of the acoustic way by using speakers you can try to erect it by a electromagnetic coil as well. Didnt try it, but from a physics point of view it should work.
@onjofilms
6 жыл бұрын
Interesting, but I wonder what would happen at a frequency that was the lowest on the spec analyser.
@godfreypoon5148
6 жыл бұрын
That's friggin' remarkable.
@garryhoddinott7956
6 жыл бұрын
Fascinated, amazing art hiding in natures noises
@dtyle1890
6 жыл бұрын
Do the resonant nodes map a wave of any kind or is it random depending on the shape of the pan?
@oscarzt1652
6 жыл бұрын
what determines the shape of the nodes?
@dtrain8335
6 жыл бұрын
Which spectrum analyzer app is that? I've been looking for a good one that holds the peaks like that does.
@JoseSilveira-newhandleforYT
6 жыл бұрын
The last pattern has a somewhat feminine look... or is it just me? Back to the shrink and Rorschach patterns :-)
@ajsiemers
6 жыл бұрын
it's at least one more than just you :)
@shadowdog500
6 жыл бұрын
I saw it as well. In the middle there was one that looked like a face of Java the hut. Chris
@musthavechannel5262
6 жыл бұрын
That makes it four of us
@TheeModerateGamer
6 жыл бұрын
Nice, maybe you could conjure up some experement to do with Young's Double Split experiment?
@ZifStone
6 жыл бұрын
Can you tell what software do you use, please?
@moelodin
6 жыл бұрын
What shape would a sheet of metal have if the goal was to get as few standing nodes as possible during a frequency sweep from 10 hz to 20 khz?
@jetison333
6 жыл бұрын
moelodin probably make it really small actualy
@robin888official
6 жыл бұрын
A nightmare for video compression algorithms. :-) Interesting to see how the areas of moving sand just blurs and blocks.
@NicoSmets
6 жыл бұрын
You can attach the plate directly to the vibrating coil, for better power transfer.
@RenzVC
6 жыл бұрын
Matthias, do you know that your mousetrap-design is being sold on numerous chinese websites?
@albertlagerman
6 жыл бұрын
I never thought you'd make a speaker blowing video! Next time invite Garret Claridge XD. Also at 2:40 it looks kind of like a graph of tan of X
@daftnord4957
6 жыл бұрын
do this with wood to find the resonant frequency of guitar tops and backs
@linearone
6 жыл бұрын
Anybody else remember when this was a woodworking channel?
@NOLAMarathon2010
6 жыл бұрын
To me, this one was as much fun as a woodworking video...
@Neotoribaru
6 жыл бұрын
You could have seen the frequencies must better with an app which shows the harmonics not the spectre. I don't know if there's an app for phone or tablets but I used them all the time when I was studying electronic music as a musicology student.
@BloodSprite-tan
6 жыл бұрын
studying electronic music sounds fun.
@matthiaswandel
6 жыл бұрын
I much prefer a graphical display so I get a better sense of what's going on. The frequencies I'm looking at are not harmonics of of anything either.
@farmerbob139
6 жыл бұрын
ever thought of building an arduino automated mini solar dry kiln?
@headrobotics
6 жыл бұрын
Great concept; but you can explore more easily by getting an app with a slider / knob control, where you can easily slide up and down. Perhaps you could try that with sawdust or colored sand next.
@TheAmpair
6 жыл бұрын
Using pepper might be hot?
@headrobotics
6 жыл бұрын
TheAmpair that could work; might cause some coughing if it got in the air :)
@septianatripratama1454
6 жыл бұрын
@mathias, nice experiments, i just follow u, thanks for sience 😀
@amirhouseingholinia2023
6 жыл бұрын
Some images resembling nebulas and collided galaxies
@palewriter1856
6 жыл бұрын
Um - how about - let's bring this back home to WOOD? What's that experiment likely to look like on the back of an acoustic guitar? I've always wondered how on earth lutiers back in pre-tech times (or wizards like Stradivari) could have ?known? how to shape soundboards (or, for that matter, how it's done today, if any tech is used now?) I remember some horn-shaped woofers in a wall of stacked speakers at a "day on the green" concert in the Oakland Colliseum - the big end of the "horn" being about 5' by 10' and the "driver" looking like an 18" sub maybe - and I DO mean WALL - pretty sure your amp wouldn't have blown THEM? tisk tisk
@spikeydapikey1483
6 жыл бұрын
Love stuff like this!!
@fborquez99
6 жыл бұрын
Excuse my ignorance in the matter, but how is this info useful?
@ron827
6 жыл бұрын
If you double the frequency, you may also see the nodes double.
@JavierGonzalez-vf6rr
6 жыл бұрын
You are insane. Do more experiments please. 😁
@jimkodysz5404
6 жыл бұрын
Wow, just like watching Mr. Wizard! (Am I showing my age?)
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