Acoustic Cooling & How To Manipulate Heat With Sound (Thermoacoustics Part 2) 

Yes, please cover/explore traveling wave engines.

Man, incredible work. You saved me a massive headache in trying to explain this for my James Webb telescope video. Going to reference you in my video as thanks

This video is 2 years old and one of the best educational videos of thermoacoustics. Please keep going and create a traveling sound wave demonstration as well, I still do not fully understand how they work.

You are very good at relaying info. You simply say what is true. And you disambiguate phrases/words/concepts that people easily confuse. I would definitely love to see more acoustics stuff!

oh dang. this is advanced. youre even breaking out the mood ring technology

Uhh yeah? Dude turn this into a whole series, please! This is amazing!

I hope you read new comments on older videos still: If you combine this video with your more recent video about self-cooling paint, and then build a system made with wind pipes, you could make a fully passive air-conditioner. The wind pipes generate the standing wave, the heat dissipating paint will radiate the heat away (either by feeding heatpipes to a cooling panel, or by painting directly onto the tube in the hot areas. The heat should radiate outward because of how your paint is made (the painted surface sticks to the paint layer slickly, allowing conductive transfer into the paint, while it also prevents the paint from radiating it back into the tube, while the outside will have a greater contact surface with air, allowing for convective cooling on top of radiation as soon as the temperature goes above ambient. Now if the wind is created by passive ventilation techniques, it would let the hot air create the resonance tone on the way out, while the cooled air pushes down and into the room, creating a fully passive clean cooled airflow even when there is no wind outside.

Very much hope there will be a part 3! Also acoustic heat pumps seem to be a very interesting technology, would love to see you discuss the basics of those as well!

Other science channels cover a lot of interesting stuff too but this channel's the one and only channel that I can rely on to find out something new every once in a while, then the other channels start covering the same stuff because of it.

You should try to get a company to send/sponsor you with a thermal camera, you could use one so much!

F'mindblowing.. Searched for part 3 many times now.. I really wish to know more about this topic, I am going to recycle a subwoofer..

I must say, this is absolutely the highest education-grade quality of RU-vid there is. You are a gold standard. Keep it up!

The way those layers were kept separate: genius move. Really good idea.

Dear Ben, I'm glad to see the Part 2 of your thermoacoustic video series! You have done a very good job and you are presenting the experiments nicely and clearly. I hope lot of people will start to interest about thermoacoustics because it is a really interesting topic of the heat-engines. It was a good collaboration I'm waiting for your next video! BLADE

I've been in HVAC/r for over 20 and all I'm going to say is you have my attention! This is some pretty interesting material!

You got a gift for teaching, one of the reasons I love your videos. Simple is better when learning foundational concepts. DIY is almost intuitively included with your demos. Thanks!

This is a really fascinating subject. Great video!

Awesome Ben! I always feel like I walk away from your videos creatively inspired. This was incredibly well demonstrated.

More of this please sir! Both absolutely fascinating and extremely informative. This is the type of stuff that could inspire aspirations for further exploration into the sciences amongst young minds both now and in the future.

Thank you for making these videos! I've always wondered what sound waves are capable of since I first learned how the basic shapes of them can influence each other so much! Just watching these has given me a few ideas for some projects I'd like to try around the house! Please keep it up and thanks again for being an entertaining and informative youtuber!

These videos are absolutely excellent! The combination of high production quality and a clear build-up of information works so well. You manage to simultaneously be more informative than most other educational channels, without requiring excessive existing knowledge from the viewer. Bravo!

I'd love to see this developed further, especially chaining the stacks together to get more extreme temperatures and building it into a device that can actually do something even if it might not be the most efficient thing.

Rediscovering you after realizing that YT isn't pushing your stuff to the front of my feed. Made sure to click the bell this time. You are a Gem of the Internet!

As a professional brass musician and avid science enthusiast, this video makes me incredibly happy. Your explanation of fundamental resonance and the harmonic series is very well researched and explained.

I'm a musician and I will gladly watch your videos on acoustics until the cows come home. You are the first person to ever introduce me to thermoacoustic engines & refrigeration. I wish this stuff was taught in physics class, but I REALLY wish it was taught in music class. Thank you!

Dude, the amount of hours that I've enjoyed watching you is amazing, especially since i didn't really enjoy science class. if you were as science teacher, id come to your classes no matter how old i am.

Loving your work man and your take on science communication! Your explanations are exceptionally clear, accurate and fluent.

I really enjoy how simple you explain complex science.

I’d love to see more on thermo acoustics, it’s a really interesting subject I knew absolutely nothing about! I’d love to see the travelling wave designs too!

The way you've been able to break things down into a MUCH easier to comprehend way is honestly stunning. This is such a complicated topic with so much to try to grasp, yet you've managed to not only flawlessly explain it all, you manage to do it without ever sounding pompous. That said, HOLY HELL thermoacoustics is SO freaking cool! I never would have thought about using the flow of sound to generate/dissipate heat or even generate power. It would be incredibly interesting to see what the efficiency of such systems would be and explore whether or not they could be feasibly be used in lieu of more traditional methods. Like, is there a way that you could utilize the (natural or artificial) wind to generate a tone that could power one. What kind of energy could a thermoacoustic system provide under those conditions, and would it even be possible. It'd also be really interesting to see if different gas compositions (in a closed system) would produce results that are different than the natural atmosphere and what difference they would/could make. Higher/lower temps? Faster/slower diaphragm movement? Etc. There are a million questions that could be investigated; could it be possible to generate visible light using a certain gas mixture in a specific situation?

This guy has a wonderful way of explaining his self. It's easy to let the viewer get lost and just recite information to sound cool. I actually intook and consumed the information quite well and fully understood everything. A great teacher perhaps?

Dude I am amazed at what you're doing. Partially because of what it is and partially because I actually understand it. You are so cool and I definitely want to learn more about thermal acoustics. Thank you for doing what you're doing

Dude, your delivery on every topic you cover is amazing!

Hey there Ben, Ive been a subscriber for awhile and I have no idea if you are going to read this but I just want to let you know that it’s ok to take a break from time to time. I know how stressful it is having people push you to make a new video and having to keep your private life out from work life. If you EVER need to take a week long or even month long hiatus, it is OK and I promise you that we will (almost) all support you in your decision. Your eye opening content has been played in many many many science classrooms all over the world and you are inspiration to millions. Again, if you EVER feel stressed or depressed don’t hesitate to take a little while off. I hope your doing alright and no matter what we’ve got your back 💙

First of all, thank you so much, my friend! Me and a close friend use to share to each other your contents. We pretty often discuss about it and plan to share some of them with his students, what I'm planing to do as well when I have my own.

More thermal acoustic cooling please. I like your delivery and your choice of topics keep up the good work

His models are so clean and more/less ready for a science museum. I hope you get funding from education, sir! Your contribution is massive and very interesting. I hope you’re getting adequate support!

I love you man. I really do. so much quality, entertainment, education. But most importantly, its how you seemingly never give up on projects. Lesser channels make a project but with little to zero follow up after the fact. And I love how genuinely interested you are. It feels as if you're taking us with a journey of your own discovery instead of just being a show host.

Acoustic ring resonant concept is intriguing and has other amplification applications I find absolutely essential to design, more work with this would be very useful and immensely appreciated.

I've been studying this for some time. Your certainly on the path to great success.

If you were my professor when I was young, I would have become a Scientist

And...omg yes! Please continue this series!

Reminds me a an experiment done around 1967 with microwaves. A standing wave was set up with about 5 nodes and a row of plants along the standing waves. The height of the plants depended on their position along the standing wave. The height was attributed to temperature: where the waves superimposed, the temperature was higher and the warmer temp made the plants grow better. Where the waves interfered with each other, there was no temp increase.

Your videos fill me with hope. You make science so easy

I feel like I say this almost every time, but the production quality and quality of content of this channel is nuts. I keep saying it because it impresses me every single time, so keep it up Ben! you are doing a fantastic job that always leaves me inspired!

Loved seeing the overview of previous "failed" builds! Always cool to see your engineering process. Please keep building new models, this is so cool!

Very cool, and great explanation. I can definitely appreciate the amount of work that must’ve went into making these models.

This is super interesting stuff. I'll watch anything in this series! Go as deep as you can and keep the awesome gadgets. The visualization really helps!

Imagine an air conditioner that uses the heat from the sun to produce cool air without using a mechanical compressor! How cool would that be?! An even more energy-efficient and eco-friendly air-conditioner.

Imagine a society without electricity being able to set up a refrigerator for their food that used no moving parts and only required they kept a fire lit in one specific spot.

Pretty well done, talking through all the concepts and then the demo

Love your works, and yes those foam balls are just arranging where they are supposed to! You should check to see how much magnetism is around that tube while the foam balls are dancing inside, I think you will be surprised with that experiment. Your an excellent teacher as I am learning more each video you make. Awsome thanks!

you and thought emporium are the two science channels that feel the most like they're bordering on either sci-fi or magic, I can't tell. Like, I'm always so stunned by the stuff you're explaining. Very much looking forward to the rest of this exploration, absolutely fascinating

I have actually NEVER commented on a you tube video but I have to say, Ben, you're an amazing teacher. Thank you for your inspirational videos.

Love the experiments and you always smiling. Love your work

I love this series I hope you will present the third category

You have an incredible gift, plus the drive and intelligence, to be able to consistently tranform the wonder of science into beautiful art.

I've been patiently awaiting part 2. I love the methods in which you explain things, I'd be interested in seeing a collaboration between you and Steve Mould.

The sound-tube reminds me of a basic form of spectrum analyzer. Awesome explanation.

I learn something everytime I come to this channel! Thank you for that my friend! I vote on MORE on this subject, not so much for it's current use, but what we haven't learned what it's capable of! Ya Rock Mate, thanks Fer sharin again!

woah that thermochromic tape is super cool. i didnt know that existed! awesome series. please continue down this rabbit hole, its very interesting and im sure theres something to be learned from it.

new watcher here, would watch more on acoustic heating/cooling.

I think you and all who contribute to your efforts are amazing !! When I have the wallet, you are one of the very few on an even shorter list short list I intend to contribute. Thank you sir!

Absolutely fascinating. As a musician and speaker designer, this physics lesson really appeals to me! Thanks!

I became fascinated by this subject when I read a report that staff at Los Alamos used a thermally excited acoustic heat engine to cool the tins of beer served at a staff outing, come barbecue. The solid state cooler worked by placing one end of the unit in barbecue fire, and the other in a water cooler bath for the cans of beer. The whole unit resonated at a very low frequency, emitting a low humming sound. From memory, the report showed a dumbbell shaped arrangement with an air gap between the hot and cold sides. A schematic drawing showed the arrangement of parallel metal plates, refering to the dumbbells as Holmholtz resonators. From memory, the report was in an issue of Scintific America or New Scientist. I have since learned that the technology has found an application in nuclear submarines, but I do not have the details of what is being cooled or heated, but I believe it is the submarines electronics.

These videos are great, not just in "content", but overall quality as well. As for recommendations or thoughts on other videos, I wouldn't mind seeing things like thermoacoustics. Just stuff you don't normally consider or pay attention to, yet is fascinating if you take a moment to learn about.

Your channel is pure gold!

This guy makes such cool videos, even his ads are cool. How was I not subscribed before?

I love the little smile he gives when his demonstrations work perfectly :)

Cool! (In every sense of the word.)

Your experiment reminds me of those of cymatics. Love it!

Thank you for all your videos. They are scientific, precise, and neat. Simply said: Excellence in performance...

i do like it. for a moment, i'd thought of a traveling wave in a loop thinking i'd stumbled on to something original. was excited, and still am. it's thrown me into an imagined world using the concepts for metallurgy. developing new cheap metals is something we could all use. thanks, this has been thought provoking.

this is some of the coolest stuff i've ever seen, PLEASE continue with this series as far as you can, i'll watch each and every one of them repeatedly

Fantastic and inspiring work. Great demonstration of sound waves behaviour inside a tube.

You do a great job of explaining this process when researching the james webb years ago i had to rely on very scientific definitions and diagrams... no one had a practical expirement to show how it works. Is a very simple idea but when put on paper without a nice model it seems much more complicated.

Super impressive, I can tell the story was well planned by how well it flowed and how easy it was to understand. I might have to build one of those polystyrene ball sounds tubes for teaching undergrad physics.

The ideas and concepts this channel continues to produce never cease to amaze me, many of which I've never even heard of nor even dreamed possible. Keep up the fantastic work good sir, and I hope to see you include your bird in more videos :P S/He's just so darn adorable!

Absolutely brilliant, please continue with this series!

This was such an outstanding demonstration! Looking forward to developing my curiosity even more

You're my only source for this black magic I need more.

Honestly, I never thought Science lessons could be so much fun and enjoyable.

Now I understand how the refrigerator in my RV works! Very cool, literally I guess, thank you I will be watching more of your videos.

I Love the concept. Thanks for your time and videos

Definitely interested to see more! I work with sound as a composer and generally a noodler, and it's interesting how the properties of sound can be used for something mechanical like heat pumps. Very cool!

I'm fascinated by this stuff. Do as many videos as you want to, I'll never be bored.

I've just subscribed to your channel, awesome content. I'll be watching them and learning more.

This is something new I learnt today. Great content. Subscribed.

Please continue. I'm enjoying the series.

The first harmonic is your original wave with 2 nodes and 1 antinode, the 3 node 2 antinode is the second harmonic. Also a very interesting video I can't wait for your next one!

Please make a part 3 of this. This is hella fascinating

Just found your channel and this couple of videos and I’m loving it!! Thank you for them. Look forward to seeing more of your content!

Amazing work! Reminds me of various chapters of 'Sound', written by John Tyndall. I don't normally comment on videos, but i find this subject to be particularly fascinating and you are doing such an amazing job presenting these concepts, so please continue! 🙏🌌🎧

This was an amazing demonstration of thermo acoustics. First video of yours I've seen, and I'm a big fan now. I appreciated the mystery of wave/particle theory you presented in the understanding of standing waves. Your demonstrations truly reflects the work and research of the famous inventor Nikola Tesla (whom I have researched for many years). I hope this series on acoustics continues, and I wish you luck on your journey.

Never stop making these videos.

This video is giving viewers many ideas. Thanks.

WOW, I'm totally impressed by your video. Perhaps if you had a fluid moving through the hollow copper pipes, to take the thermal energy differential thus generated, in or out of the system, it could possibly have unlimited potential uses. Imagine using the sun's heat to generate the necessary power so that you can use your thermoacoustic engine for internal cooling in buildings. Like I said, the potential of this kind of technology is practically limitless.

See, this is why I love physics. I would absolutely love to see more. There’s nothing that feeds my adhd brain dopamine quite like this.

Valuable lessons of excelence with simplicity. Superb!

Terrific video, thank you for taking the time to do the research and create the prototypes.