Coffee Cup Vibrations - Numberphile
Вставка
- Опубліковано 27 вер 2024
- Tadashi explores coffee and tea cups to new depths...
More links & stuff in full description below ↓↓↓
Playlist of Tadashi Tokieda videos: bit.ly/tadashi_...
Support us on Patreon: / numberphile
NUMBERPHILE
Website: www.numberphile...
Numberphile on Facebook: / numberphile
Numberphile tweets: / numberphile
Subscribe: bit.ly/Numberph...
Numberphile is supported by the Mathematical Sciences Research Institute (MSRI): bit.ly/MSRINumb...
Videos by Brady Haran
Brady's videos subreddit: / bradyharan
Brady's latest videos across all channels: www.bradyharanb...
Sign up for (occasional) emails: eepurl.com/YdjL9
Numberphile T-Shirts: teespring.com/...
Other merchandise: store.dftba.co...
A NOTE ON THIS VIDEO:
A few of our Tadashi videos blur the already blurry line between mathematics and physics... Some people suggest they may be a better fit on Brady's dedicated physics channel (called Sixty Symbols).
In response, the reasons they are on Numberphile are:
1) Tadashi, while certainly a modern polymath, is based in a mathematics department.
2) This sub series (with its animation and extra production work) has been supported by the Mathematical Sciences Research Institute, a Numberphile collaborator.
3) Some of the previous and future Tadashi videos are more math-oriented than physics - and it just makes sense to put them on one channel rather than dividing the series between two channels on an ad hoc basis.
In a multi-disciplinary world, it is challenging to run UA-cam channels which people come to associate with just one discipline.
That said, feel free to go over and watch hundreds of physics videos on Sixty Symbols --- / sixtysymbols
I love how just as the Professor explains something you immediately see where he's going and a whole load of stuff you never thought about before suddenly makes perfect sense.
same. excellent teacher he is
He was very elegant about the "what is sound?" sidetrack. A concise explanation and then swiftly back on track again.
Yeah he basically explained the whole concept of sound in around 20 seconds, it was impressive x)
+
I don't find him as interesting as the other people on this channel, but you're right... His explanation of sound had me going, "wow, sound is just how we perceive tiny, fast movements in the air, how weird is that? What if we could do that with all air movements? We could 'see' everything going on around us, without our eyes".
Because of Tadashi, I am now aware of the very low musical quality of my mug. It is almost as if the manufacturer wasn't thinking about tone at all.
What manufacturer would forget about tone?
How dare they! You should never buy a cup from them again xD
How would apple design a coffee mug?
??.
it was inevitably, I immediately went to my kitchen for a cup and try it...
and after hearing it! I was smiling like a kid!
+Leckam nice work
I really wanted to go to the kitchen halfway through the video hahahah
I did the same!
hi
Hundredth like
(You're welcome)
Whoooom Whooom vs heehooheehoo - that just made me roll on my office floor laughing loudly
Japan...
*insert nuke joke*
+Baran Hekimoglu Oh no, not the nuke jokes! Must... resist...
This is why you don't nuke a country twice.
Goddamnit!
mikosoft this one goes W H O O M M M M M M M W H U M M M M M M M W H O O M M and the other one goes *heehawheehaw*
Full 6:00 . Whoom 6:03 . Heehaw 6:09
6:00 "Heehaw" Take notes, guys, this some scientific stuff.
Wom, wom, wom.
+
This is why we love him.
Hasnain Hossain double comment warning
Nathan Adam got an error the first time. Down with the system 👎
Tadashi's sound effect for an unweighted spring kills me
Kellen Dooley Sounded like doodle-bob from SpongeBob. "Mihoy-NINOY"
sad to hear that.. RIP in peace yo..
this dude is always awesome.
+
6:04 Made me meditating.
Causes a lot of problems. His classes are AA (always awesome) meetings.
Prof. Tokieda always manages to find a topic that is both easy to get into and interesting to delve into.
Fantastic teacher. And thank you Numberphile!
Tadashi is the only man who can get me interested about cup clinking
also, heehaw heehaw
Lol
MOAR TADASHI
Useless stuff boss level
@@LangKuoch Hahahaha
Tadashi Tokieda is so charming and charismatic. Very relaxing speaking voice. I could listen to him all day.
0:41 Jaws theme!
...Or New world Symphony
I like the accompanying animations. Really helps me to understand the concepts
"Since we're talking about the pitch .., let's imagine ourselves in a pitch dark room"
10/10 Tadashi
this guy is excellent at explaining things
Tadashi never fails to teach me something new in these videos. Awesome stuff guys!
I just about spewed out my coffee when he made the 'hee haw hee haw' sound effect for the little spring. Caught me off guard lol.
I didn't even know that different points would have different pitches! I was blown from the beginning! lol
when he made the sounds of the springs it killed me
"Tadashi, stop playing around and finish your coffee" - Tadashi's mom
I've wanted to understand this for so long!! I can die now! Thank you
Hi
that can be arranged....
+David -flamingsword1 The authorities are on the way to your address.
That escalated quickly.
Just give me a call.
I know people...
Tadashinis flippin’ crazy. He has the weirdest yet most brilliant demonstrations. I am so enamored by this man.
I'm a Potter, and if you send me your PO box I'll send you a 3 handled cup, 5 handled, whatever you'd like!
i guess you will create those cups with your wizardry...
Only while foregoing visits to the barber.
You could sent it to his attention at Stanford's math department :)
Aedric Donovan Just know that his full name is Tadashi Tokieda.
From a recent video, a three handed mug was demonstrated to be homeomorphic to a torus with three holes which is homeophoric to a hole in a hole in a hole
The recreation of the logo on the cup was spot on.
His choice of words is always so delightful!
I love the way the Professor talks, it is just so engaging
Love this dude always get excited when he pops up on the channel! Excellent video!
this guy's accent just makes me happy, it's so soothing
Please never stop making videos with Tadashi
Tadashi is amazing. Every explanation is crystal clear, and he makes any subject absolutely fascinating
Adding to everyone else's comments, the reason I love Tadashi's video is that he rarely actually uses maths equations (as far as I can remember) to explain what is happening. It's all visual with animations and practical testing, which is great!
Seeing a new Prof. Tadashi video makes me instantly happier.
My favourite Numberphile video so far. Please post extras (I know it's 11 minutes long and there might not be any).
Tadashi's explanations are usually really fully formed and to the point. The only major thing I cut was a short explanation of why the cup want's to maintain it's volume, short answer: it takes a lot of energy to distort the cup like that.
This is brilliant! A great, easy to understand demo and explanation of the inverse problem. The inverse problem is indeed everywhere in science, e.g. in brain data analysis. The electric or magnetic field pattern the EEG or MEG (respectively) measures from outside the skull can be a result of infinitely many different combinations of sources in the brain, yet we usually want to know where in the brain the acitivity comes from, which requires a solution to the inverse problem. Basically, given the measurement of pitches, we want to figure out where the handles are in the mug. Thanks, this demo will be useful!
Okay...I'm geeking out here.... It's kind of funny how the mathematical side of my brain can interlope upon the creative (i.e. engineering/physical building) side and start to understand the subtle nuances of just what it takes to make things do what it is that you might wish them to do.
Take, say...the making of a brass bell. I now understand that if any one point of that bell rim where just slightly thicker than the rest (thereby giving it more mass)...you could produce a bell that would actually produce more than one tone when struck (depending on just where it was struck).
This is exactly why I love watching videos like this. These give me insight into the world around me that I otherwise would have overlooked.
Impressive explanation skills on Brady's side as well. Amazing animations and great editing
I did my masters on structural health monitoring (civil eng) and i've been using the Chinese porcelain example to elaborate on what was it all about. But, i see this and say this was the way i should have been explaining it. Very neat exemplification and it covers the mode shapes and the backwards problem solving issue so well ! I absolutely love this guy's style.... Just to add a note, Dr. Tadashi may find the case of 3 handles that are not 120 degrees apart more intriguing, since it is the basis of very stable honeycomb structure after all.
Wow this is one of the nicest explanations I've ever heard for inverse problems
When it finally clicked in my head what he was trying to tell me, I just couldn't help but smile. I love learning new shit.
I love how the professor always explains things so nicely
The vocalisation of the heavy and light springs was just... so perfect
The difference in those pitches sounds approximately a half-step apart for both the coffee mug and tiny cup. Sounds approximately E and F for the coffee mug and then A and B-flat for the tiny cup.
wouldn't the pitch difference depend on the mass of the handle(s) that need to be dragged along?
or maybe the mass of the handle in relation to the mass of the moving walls of the cup?
if that's true it would be a coincidence that both are a half-step apart. unless it's because the handle-to-wall mass ratio is what looks nice for cups.
The tiny cup pitch difference is definitely microtonal. Probably 30-40 cents.
The tiny cup actually sounds like it's difference is only in upper harmonics. Seems like base frequency is the same
mikosoft Well, the sound of the tiny cup ringing is chock full of overtones anyway.
I love Tadashi's explanations! His voice is so calming too!
I like these videos where this professor explains things in a tactile way paired with animation
Man Tadashi has always been my favorite guest on Numberphile and he never disappoints. More Tadashi!
Could watch and listen to this guy all day. Please make more of these videos. Very interesting topics.
The best way to visualize this is using a head massager the wire kind where there is usually a set of longer prongs and shorter prongs all arranged in a circle. If you vibrate the longer prongs all the other prongs will move and the smaller prongs will stay motionless and vice versa for the shorter prongs.
Gotta find your cup with three handles? Big Rigs has you covered.
*****
You're winner!
+Noble VI late for work? drive backwards through the buildings!
So has Cliff Stoll.
Ive never been so interested in the cup that holds the coffee, just usually the liquid inside! Thank you!
I went into this expecting to still not understand by the end, because that is how it usually is with these kinds of videos, but I got it really quick. well done video
I'm really enjoying this Tadashi fellow
I really like how Tadashi's stuff all seems to come from a child-like interest in the most mundane things along with enough intelligence to go through with figuring things out.
When I grow up, I hope I'm able to do that.
i love how he sais "higher pitch" with a higher voice and "lower pitch" with a lower voice
His English is so excellent and learned but his Japanese accent so authentic. I love listening to this man.
The animations are also awesome. The last chime is indeed beautiful 😊
This guy is amazing!
By the way, I don't agree with that if the cup were moving as a whole it wont produce sound. It would, is just that things don't remain vibrating as a whole if you don't maintaing a force for that, but they do keep compressing and expanding, without any force :)
Thank you for all the videos.
That's my favorite kind of science right there!
Great animations! They really helps to understand how the things work. :)
I love professor Tadashi's sound immitations :)
Don't think I could've understood this without the fantastic animations ... and Tadashi's wonderful sound effects ;)
A funny thing I noticed is. If you have a full cup of a warm liquid. Tap the bottom. It has a singular note. Now stir the liquid and start tapping the bottom once more and it's not a singular note anymore. It rises or drops in pitch.
*****
I noticed it with tea and that has no powder nor residue in it at all.
+Niels Schellekens The reason tea is darker than water is because it had tiny tea particles in it.
SadEugene
That's my guess too but it doesn't do both. It's *either* up or down. Not up and down like a wave.
hey, I noticed it too during a coffee break and wanted to share that as well. You can tap continuously after stirring and the pitch will go up. Because I noticed it with coffee that has a significant amount of foam, my hypothesis was that it was related to bubbles in the stirred coffee slowly coming to the surface.
I could listen to Tadashi for hours
I don't know if I love the explanation more or the animations!
The Stanford mug was ringing about a minor second between the two, which means it could be used to play the most familiar part of the Jaws theme
I'm loving all of the Tadashi videos. Brings out the math in everyday things. In some ways more physics oriented than many other physics based videos.
Ok who can fire china, make Tadashi his 3 handled sonorous cup!
What a charming presenter. I would watch any video he's in!
Riveting! I so much appreciate all of your videos. Thank you so much for ALL of these.
voice - noises
bird - light chirping
cup - SMASH CUP WITH SPOON
I love it
Oh man, I was able to see where this was going as soon as he confirmed the handle was related. I've been teaching myself guitar and noticed things like this when I found out about harmonics.
My life would be complete if you started an Audiophile channel, or even a Physics channel with a sound and audio sub-channel.
On a related theme, I have often been fascinated by how the pitch of the note rises as you add liquid to the cup. Give it a try!
We can also look at the effect of making the "lip" of the mug a different shape, other than the traditional circle.
I can't belive i haven't noticed this before! Thanks!!
Loved the part about the "inverse problem".
I can definitely hear a different sound on the side with a handle.
6:36 anyone who watches the show _Silicon Valley_ will recognize that green and orange ball on the shelf behind the professor! those things are so much fun. i have the same green and orange one. my kids and i love it!
I'm a simple man, I see Tadashi's video, I like it.
This was far more interesting than I thought it would be.
Awww man, Tadashi is the best
Tadashi Tokieda is tied with James Grime as my favorite Numberphile Contributor.
I would love to see a video of a conversation between Professors Tadashi and Copeland!
Stanford cup? Stop with the product placement, Tadashi.
I thought the same.
Guys, I think he works there... Maybe put away your tin foil hats for a moment and enjoy the video.
product placement is illegal in the UK...
Really?
MagniloquentlyPuncturedKeyboard or MPK Yeah @10:35
I used to wonder about this effect when i was little. Thanks a lot.
Nice video! Something that I noticed with cups also is that you get a different sound if you have cold or warm liquid inside.
this guy is awesome
I literally had this set as a problem in one of my university exams! I remember scratching my head for hours over it, but this explains it so well! :)
Tadashi Tokieda has been my favorite person on numberphile since his first video and he never disappoints. Although there's a lot of other really awesome presenters too who I
Hmm, a larger cup with 3 handles might be "De pot van Olen", this is a cup commonly used to serve a beer named "Keizer Karel" in Belgium.
It is not retaining a constant volume, but a constant circumference
if only any of my teachers were as amazing as this guy
Every time you hear someone like this explain something, you understand the difference between someone who teaches at one of the best universities on Earth and someone that teaches at your everyday, high acceptance rate university. I feel like I would have been much, much more interested in mathematics with someone like this teaching, I might have even majored in it.
For a moment, when I read the title of this video, I thought it was going to be about another strange phenomenon you get with espresso cups. First you make the coffee swirl fast inside the cup using the spoon; then you start tapping repeatedly with the spoon on the center of the cup's bottom, and listen how the sound changes as the coffee slows down to a halt. There is an interesting article about that in the Wikipedia: it's called the Hot Chocolate Effect, if I'm not mistaken.
Gotta love, how Tadashi kept slipping in puns to his explanation, very casually 😅.
Tadashi-San videos are always amazing!
0:14 he definitely nailed that note.
I want a Tadashi sensei waifu pillow
its called husbando
It's called a Dakimakura actually, that's what the pillows are called in Japanese, but yes, husbando would be more appropriate than waifu.
This will make me a star at my next tea party!
Love seeing cool phenomena like this emerge from every day objects and experiences. Great stuff!
This guy is a master of everything
This is so cool! The best introduction ever to inverse spectral problems! Thanks!