Can You Figure Out the Mysterious Self-Singing Pipe Experiment?
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- Опубликовано: 14 май 2024
- Checkout Brilliant here: brilliant.org/theactionlab/
In this video I show you how a mysterious experiment where a heated pipe begins to make sound! I talk about resonant and natural frequencies and show you some neat experiments that make sound using resonant frequencies.
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DISCLAIMER: Any experiment you try is at your own risk 
Развлечения
A: What instrument do you play?
B: Metal rod.
A: Like... you mean a triangle?
B: I mean, with a blowtorch.
A: Uh-huh *slowly backs away*
B: Heh Tehc
confusion INTENSIFIES
ah yes, ababa
*running eurobeat intensifies*
ABABA
This guy is about 100 times more informative and easier to understand than any teacher I ever had in elementary/high school.
That's the shitty curriculum for ya.
Because it's his passion, not his profession.
@@ironclad452 thats a dumb comment.
What about middle school?
@@cosmicbilly no, it's a smart one. Those who teach science are different from those with hobbies of science.
The title of this video should've been "The sound I make when I stroke my rod"
Baba Wethu 😟
HMMM
n o
I don't get it?
@@unknownrandomcomment8453 Good its a adult joke
Me:Can we call the police
Mom:we have police at home
Police at home: 10:40
Lol
at*
Wat
Hahahaha
😂😂😂😂😂
That feeling when even a pipe sounds better than modern pop
Tf
Just about anything sounds better then modern pop but this is leaps and bounds better!!!
*_Ed Sheeran wants to know your location_*
Your name is yespacito and you have a kirby peter sans pfp. Im sure you have a sub 100 iq
Yes you are the next great Justin.Y
10:38 ....when you hear Ambulance coming towards you😂😂😂😂😂😂😂😂
Nice
😂😂
True I laugh everytime someone is in danger near me and can maybe die... 😂😂😂😂😂😂😂😂😂😂
Lol minions style
😂😂😂
5:25, when he said "louder" 3x its like he used some kind of voice effect
Laouder laouder and laouder
Lol
I didn't even notice at first, he sounds garbled like a robot bounty hunter from starwars
it's actually torough the video if you focus on it. I think he had an audio problem (like sound buffering)
Sees the video
Me: *BUYING A METAL ROD ON APRIL 1 SO THAT I CAN PUT IT IN A LIBRARY AND RUN*
LOOOOOL
lol
wait a minute, heating the pipe will need fire... GOODBYE BOOKS!
Curtis Warren BTW STOP BEGGING he means the other one.
It _r h y m e s . . ._
" When i stroke it it just gets louder and louder with each scoot of my finger across it " 😏 5:24
Marc Bou Abdallah .
That's what she said
Or he said
@@jesseybarra3408 was bout to ppst this instead.. I just though its a bit too much
Marc Bou Abdallah she said that too
This is so much more interesting then science class
Than
This is science class, and its not grammar class
It's
Barrett Barker SHUT UP 😂
Haha
I learned today that I should take warnings seriously
As a musician, I feel the slinky thing at the start is a great analogy for the harmonic series
This probably explains those HUMMMMM sounds no one knows where it's coming from.
Very true
Rich Rich HAARP
I hear a general humming sound due to power lines. If you live near pylons or near over head electrical wires you'll get what I mean.
@@DSNugent91 I get what you mean
69 likes yes we did it
7:41 You are making the genie that lives in that pipe cry.
He didn't rub him the right way
@@fabricioaf89 oh god
Sounds like that crying black guy meme
i thought this was a timestamp for the tube making sound but when i heard "ee-ohh-ee-ohh-ee-ohh" i snorted
1:41 The action lab showing us how its done scientifically.
*FOR SCIENCE* lol
But what's the Title of the vid???? Gee It's kinda hard to _Guess_ when he starts off with a 5min *EXPLANATION* without *ANY* demonstration of the thing that *I'M* supposed to figuring out... It may still be a cool vid, but with that title... it put me off immediately because I wasn't shown something to figure out and instead am treated to a lecture about things I already understand and *STILL* haven't seen the damn thing *I CLICKED ON THIS FOR!!!*
@@dementare shut up weirdi
I'm gonna grab my rod and start rubbing it now.
Lol
Headphone users beware
Me:😒
Tube:EEEEeeeEeeEEEEEEeE
Me:😲
Marios Bairaktarhs ノಠ_ಠノ
LOL
Instant regret
@Marios Bairaktarhs imagine using text emojis from 2000
@Marios Bairaktarhs yes
4:15 Thanks, love u just for that.. ♥
My cat didnt like the Aluminium and heated pipe
Yupp
U didn't say no homo
Mr. ANGAD mmmmmmmmmmmmmmm hope nvtfc
I put on headphones when he said that
0:08 *everybody gangsta till the device moves on its own*
Nuke: did you see it
Everybody gangster untill the pipe starts singing Pumped up kicks
Tijl kokke - *piped up kicks
@@rextheroyalist6389 download reddit, you belong there.
head on over to the nearest school
דמויות מוזרות ?I didn't hurt you that bad, did I
The way you explained the wave i became your fan
K
RUclips Don’t demonetize because the pipe was singing
Did I just hear A sharp?
*D E M O N E T I Z E D*
Funny because... I wont explain the joke. Not this time! I LEARN FROM MY MISTAKES!!
>demonetized, copyright claimed by pipe
No ads - I guess they did demonetize it.
Lyri Metacurl i got two ads so **dab sounds**
Great explanation of harmonic frequencies. I'd always thought they were somehow magically produced along with an objects main resonant frequency every time, which has puzzled me for YEARS. Turns out they're just valleys in the frequency/energy graph (i.e. the frequencies both higher AND lower than them take more energy to produce).
Notice the pipe length is about the length of half of the aluminum rod, but about an octave lower. This is similar to a clarinet, flute comparison. A clarinet and flute are about the same length, but the clarinet is about an octave lower. The clarinet is a closed pipe and the flute an open pipe. The trumpet is a different animal though, and this experiment is much more related to a clarinet. A spectrum analysis of the pipe sound also shows stronger odd overtones similar to a clarinet sound. Great visual explanation of an audio phenomena, and a must see for my clarinet students! Thanks.
Spider man should have used this technique in Spiderman 3 😂🔥👌
👍😁👌
Yeah lol
10:40 dont worry t patrol is on their way
*the
@@kimrose1559 shut up
@@jammingfr1481 Why? Because I'm trying to fix the grammar?
@@kimrose1559 lol it was a joke
Kim Rose15 *grammar
"How can you tell I'm asking a question right now" with zero inflection xD
4:32 - me activating my bankai
4:54 - explaining its ability to my opponent
"I'm going to stroke my rod" The Action Lab 2019
"so when i stroke it, it just gets louder and louder and louder."
*oh yeah baby*
HMMMM
@Nigel Lush Sorry I'm too hot (lenny)
1:39 me on the first of December
F.N.D
no
Dude I worked it out! He's captured the soul of crash bandicoot and magnified the sound of crash in the tube!
Your own reaction to the experiments you do make them so much better than they would normally be. You're like a small child in a candy store, so filled with happiness. Good stuff.
10:41
Reminds me of that minion fire extinguisher scene from despicable me 2🤣
Ohhhhh the one with one eye i think
Ok Twitter Mom group.
lol
The background music is so calming and weirdly nostalgic
I love how your videos are made in such a way that you introduce the question, and 10 seconds later it would seem your not talking about anything related at all, but of course it is related and then you connect them. Just thought this observation was interesting
THAT'S awesome!!!! When you use science, almost everything is possible. Thank you for explaining everything you make in your videos.
@The Action Lab Hey man, I measured the frequencies after, 4:35, using an app on my phone, and I got *2500 Hz, 7500 Hz,* and *12500 Hz.* But what's cool is that, whenever you rub the rod, these extra (and annoying) frequencies of *5000 Hz,* and *10000 Hz* are added in with the frequencies mentioned above.
It seems like the odd numbered harmonic factors of 3, 5, etc. are there naturally, and then all harmonics are there when you rub it. Care to guess why? (I don't know myself, by the way)
Watch (or just visualize) the spring demo again. The even harmonics have a zero-point where the fundamental frequency had a peak. The odd harmonics have a peak at the same point as the fundamental. So while you can generate the even harmonics, they aren't resonant with the fundamental frequency, so the are dampened quickly.
Cmon! I mention this without the use of a phone and I don't get a heart? But I only mentioned the fundemental frquencies of the rods or the loudest frequency though.
Thank you, man.
@@roberthunter5059 Interesting explanation. I need to think about that some more, but I see what you're saying. And yes, the even harmonics were the ones to dampen fastest, according to my phone app. First *10000 Hz,* then *5000 Hz,* and lastly the higher odd harmonics. The fundamental frequency, *2500 Hz,* lasted longest, which is one of the reasons the sound becomes more pleasant as it quiets down.
You guys are awesome! I love this insight! So interesting, I need to redo this video and actually talk about this. Dang Jos what app are you using to measure the frequencies?
@@TheActionLab Haha thanks man! The app I'm using is called Physics Toolbox Sensor Suite. It's amazing! It gives you a g-force meter, accelerometer, gyroscope, barometer (if your phone has a pressure sensor), sound meter, and a lot more. The function in the app that I was using is called *Spectrogram (Audio).* If gives you a sort of highlighted area of all the frequencies of sound your phone can pick up from a few tens of hertz to 16k hertz. I've even used it to identify dropped US coins (they have specific fundamental frequencies as well).
10:35 he's not singing the same frequencies there, he goes down by a hole step. That explains the ambulance siren like noise he makes. Works anyway doing right btw
I sort of want to build a rig that has like 10 heated metal rods attached to heat sinks, except all the metal rods are 1.5 semitones apart for the ultimate discordant tritone. Great eerie Halloween setup.
Can you try to break the glass by sound produced by resonating rod
The glass would only break if the sound from the rod is the same resonant frequency of the glass.
@@AdamWebbadamwbb yes and that's what I wanted to know that can a rod resonates at that frequency or not .
@@gulvindersingh2275 Yes it can, you just have to find a glass and a metalic rod with the same resonance and voilà!
@@martiddy but the problem is every metal have different resonating frequency.
@@martiddy and resonating frequency also depends on the shape size and thickness of metal
10:37, what you're saying is true, but your E and O, are not the same frequency here. You're singing two different notes, like a siren kinda.
You have such beautiful ways to convey complicated concepts.
I can’t believe he didn’t pull out a wine glass and hit us with the best frequency resignation to ever see a regular Joe
"See a regular Joe" ??? see a what?
It's "obvious" why the pipe causes convective air flow, but not at all clear what is causing an oscillation. Just moving air through the tube wouldn't make it "sing" (put the tube in front of a fan or over a pot of boiling water, I'm sure it would be silent.
I suspect the sound is from variation in air speed through the tube, and not the tube itself vibrating (which is why you can hold the tube anywhere.) There should be a speed of incoming air over the hot screen that results in a steady-state (no singing). But something about that system prevents it from finding an equilibrium point, and instead keeps oscillating around it at a frequency dependent on the length of the tube.
Does blowing into the tube (from the screen side) while it's singing shut it up? How about moving it laterally? (Tube is vertical with a hot screen, but being moved horizontally like how you remove it from the flame.) How about if the tube was held in a ring stand while the screen was heated, and instead of rapidly moving the tube away from the torch, you gradually remove the flame?
You are right that it isn't obvious how the sound is generated. I am actually not 100% sure so that is why I didn't go into detail. However, if I had to guess I would say that when the air gets heated the volume increases greatly. The incoming air flow is low compared to the outgoing air flow. So we can consider it as a tube closed at the one end (near the mesh) and open on the other end. This is the same a trumpet which creates standing wave solutions at the ends of the tube.
Why does one actually whistle with lips? You blow air at a steady pace but still create an oscillation (sound). The reason is the creation of a "Karman street": a trail of vortexes, originating from the lips in a periodic fashion, created due to turbulence in the air. Vortexes impart momentum to your lips which in turn self-sustain the formation of the "street". These self oscillations (technically, a "limit cycle") are what ultimately produce sound. The frequency of the oscillation is related to the rate of production of vortexes (roughly speaking and very unprecisely, the slower the air flow, the lower the frequency). The same occurs in your "singing tube": turbulent motion through the graticule creates an array of vortexes which impart momentum to the grid and put it into a self-oscillatory state. Notice how as the temperature gradient decreases (and thus the number of vortexes and their rate decreases) the pitch of the tube actually bends lower. There's a lot of interesting physics going on in here which has little to do with resonance actually: the non-linear convertion of a steady linear motion into oscillation (same occurs also with that rod, or with a bow on a string, or when your door just creaks), the creation of ordered patterns in turbulent and chaotic systems, limit cycles just to name a few.
@@TheActionLab warmer air has more energy and tends to be more erratic, it's not the air persay, but rather the erratic bouncing off the wall of the pipe and other air molecules by the air itself causing the sound, which is notable for how it gets lower and less as the air temperature bottoms out again
@@Omnishredder and Fabio Cavaliere --Awesome insights! You are right that for the tube there is much more interesting physics going on than resonance. The fluid dynamics is the most interesting part!
If the pipe is different lengths or has a bigger or smaller diameter, how does that change the pitch? What about different metals?
4:48 that face
Waves and vibrations, man. One of the coolest things about being in the universe.
That was great! If I were a science teacher I would assign your videos to my students for extra credit! I cannot believe how much I learned in those 12 minutes!
wow! AMAZING! Yes, l want to SEE it again. l heard Yanny or was it Laurel, when you were doing eeeeoooooo
I saw white and gold.
Momma O i’m sorry but i don’t understand
Momma O yanny all the way
Ayden Lowery look up yanny laurel challenge
@@Just_Sara lol
This guy is just... so damn great. What a truly wonderful person. Dude, you freakin' rock. Rock on brotha ❤
That is so awesome! You come up with stuff I have never seen before. Thanks for sharing.
You have a fantastic way of explaining basic science concepts with simplistic yet perfect demonstrations.
Much appreciate all your great videos.
(May be just me, but just a quick input: I found that light background music little distracting :) The way you narrate and intonation etc are just perfect to make the scientific explanations catchy)
Damn, if this guy was my teacher throughout Middle School and High School, I wouldn't of failed so badly lol. Heck, if he were to be a college teacher, I surely enroll lol
Nah. This is baby shit compared to things you do in college. Hell I learned about resonant frequencies in 6th grade.
if you liked how he explained the "e" vs "o" concept, I highly recommend you research polyphonic singers, specifically Anna-Maria Hefele where they can master this technique so precisely that they can amplify the overtones from a fundamental pitch they are singing - thus singing 2 notes at once
7:50 It works because that flame heats up the mesh at the bottom. That mesh heats up air molecules causing them to rise, so when you hold the pipe directly up and down, with the mesh at the bottom of the pipe, the air molecules travel through the pipe making it resonate, and you get that trumpet like noise
I just have a physics course in high school about waves and sound. This video is a perfect boost for my exam, because he actually explains from the basics of waves and frequencies to a part when you can actually use those same information and formulas (for example V=f*lamda) to a sound.
💛 *quality content* 💛
I wish you were my science teacher 😁
Interesting, my rod makes a "different" type of sound when I stroke it
@Adam Czerniewski YA LOL
XD
Maybe you need more rosin. Don't ask me how I know.
This channel and "Smarter every day" are absolutely awesome! Thank you for showing these interesting things to us!
Ya definitely glad I’m subscribed bro I swear this is like the only channel I watch on RUclips anymore your so smart like you just know everything
They should defenetly use in that in horror movies.
SFS Eagle they use a strange instrument that’s a series of rods around a wheel to do just that, forgot what it’s called but I found it here on RUclips. I bet if you search horror movie instruments you would find it
“But I still love you” 8:01
NYAAAAAAAA!!!
NYAAAAAAAAAA!!
“I love you and I miss you” 8:16
I don't get it
?? Am I supposed to hear it?
Thanks for making these learning videos. Awesome:) please keep doing it.
If this guy decided to talk about aliens, the mystery would be forever gone. Your thinking and perceiption is always mind blowing.
Lots of love from wakanda.
4:15 "i shall play you the song of my people"
"by shaping your mouth you can make different sounds"
keeps mouth in a weird smirk all the time 11:00
???
Thank you for always teaching us various different concepts with practical examples ❤️❤️❤️❤️❤️
Best channel ever! Learnt so much from him since last year💕
“Now I’m gonna stroke this metal rod and all I’m doing is stroking it” 😂😂
1:40 also XD
“When I stroke it it gets louder and louder and louder”
man i love this channel.always fun to learn
Awesome video! I never understood resonance until today!
Everyone in this comment : metal rod
Me : "that's an Eb!"
Like vegans, everytime! 🤣
No one :
Literally no one :
The Police : 10:40
😂😂🤣😂🤣🤣😂😂🤣😂
This channel has taught me more than I ever thought it would🤯
Mind blown several times in a single video.
1:40. Uhummm his hands lol
i searchedso far down the comments to find someone who also saw this (not all heros wear capes)
i dont understand
bill wurtz needs this instrument
Lol
yes
Thank you for making videos that the general public can understand. I really hope the school systems find your channel. It would get SOOO many kids interested in science. 👍🏼👍🏼👍🏼
One of your BEST videos ever!
When will Elon Musk sell giant solar powered tesla coils for your garden as an home protection? Or maybe an tesla coil adapter for your tesla car in case of an zombie apocalypse.
No
Big science words... I understand.
Well if he can sell flamethrowers it would surely work with tesla coils too and it would fit his company name better. And who doesn't want to have a giant tesla coil in his garden that kills everything that comes a bit too close? ^^
@@lynxg3598 What do you mean with big science words? (English is just my second language, I don't understand all colloquial sentences).
It's an anecdote to C&C Red Alert btw, I loved those tesla coils ^^ I guess the practicallity would be limited to roast all birds, cats, children and drunken people who don't read the warning sign and get near enough to it, not to mention the amounts of energy you would need for something like that,.if it would work at all.
edit: wasn't there a military company (Lonatron if I remember correctly) that claimed to have build a weapon similar to a tesla coil that would work over a greater distance?
@@Killuminati23 I was just joking..
Who else can listen to the relaxing music in background..
love your videos always educative even if at first they look to be some silly experiment at the end i learn something new keep it up
Thank you for your amazingly interesting videos. Keep up the good work.
You woke* up my cat :^0
Nazghoul Master nobody cares about your comment either
@@nazghoulmaster8939 get some respect kiddo
Nazghoul Master
My cat does
yea it is because the loud frequency and cat sensitive ears
@@kurayami8338 noone cares kiddo.
Love From India for such great scientist 👌👌
Sam Jackson hope u are an Indian pewdiepie subscriber
@@olivertaikko1890 if you ask me, I subscribed neither of them coz both of their content doesn't catch my preferences..will that create hate against me?
@@sriharisridhar356 No
@@sriharisridhar356 probably if you said that somewhere else. People cant accept the fact that people have opinions in different regions of youtube lol
yuck
I wonder if there is a thermoacoustic effect here. The wire mesh acts like a thermacoustic stack which (via heat transfer) pumps sound energy into the tube at the resonant frequency of the air column. The sound stops when the pipe is horizontal because the lower air flow reduces the temperature difference across the stack (mesh). You could demonstrate this by removing the mesh and heating just the outside of the tube. I'd bet the pipe will not sing without the mesh (thermoacoustic stack).
I hear that sound all the time when we light propane heaters ice fishing in the freezing winter. The sound stays until the metal mesh reaches equilibrium and is bright orange all around. Vibrations are so fun to learn about!
“So when I stroke it, it just gets louder and louder”.
Well....I suppose I can relate depending on my mood.
what collage did u go to
"Like"s are too anonymous, I'll just keyboard my appreciation of your approach in demonstrating things
I'll be arrogant and say I already learned these things a long time ago, Thus I watch out of interest to see how you go about explaining things. I am always impressed by how well you choose demonstrations and the enthusiasm you display in your presentations.
I hope you get the credit you deserve for such well-done work.
Couldn't get your assistant for the jump rope like in your time machine video? Lol that was sooo coo
That pipe would really suck as an instrument
Not really
How can this be used
What is that ringing sound when u put ur ear on a cardboard roll ..?
Thats the sound of your blood but being echoed back to you!
@@fgvcosmic6752 ooooooo😱😱😱😱😱
@@fgvcosmic6752 ....really...?
@@woofwoof9796 yeah! Its also the same thing when you put your ear on a seashell!
That’s your phone.
Cool! Just found this channel. Fantastic.
I wish i found your channel for my science fair.
i could get 10 cause my hand got lots of practice moving like that and it gets pretty fast
😏
Nice
Man mine sits still, I move so fast
1:41 Me Probably EveryDay I See My Crush ;)
I really like your videos. They're always interesting, and it's something with which I can entertain myself without afterwards feeling dumber.
Congrats on 2 million!!!