Tesla Valve as a Speaker Port?!

I design and build a speaker enclosure using a Tesla valve as a port. Can it pump air and work as a speaker at the same time?
Timestamps:
0:00 - Theory and Design
6:01 - Construction
9:31 - Test and conclusion

[@maxlee6676]

dude this is so cool. can you do some more of this? would love to see a tesla t-line, tesla voigt pipe, and maybe even a tesla horn if that's even possible.. this video kind of blew my mind lol

[@Dakoustics]

yes to all, in time, need more space, new shed about to be built

[@brucermarino]

It would be interesting to place these ports opposed to each other, that is on opposite sides the box. Thanks for this intriguing bit of work!

[@Dakoustics]

Yep, basically sums up the next design. Might even produce some thrust lmao If it does, might even see a pulse jet video out

[@brucermarino]

@@Dakoustics Looking forward, my friend!

[@colbydolby6559]

Wow...that is a super interesting project Dak!..glad to see you're still taking a scientific approach to audio. You're definitely a madman. Great video. Glad to see you are well.

[@2869may]

This will significantly reduce resistance within the box, resulting in loss of control of the sub (almost a free air situation) Where a single port with air moving in only one direction at a time still provides some control of the sub... The volume of the box is now completely inconsistent... I'm not saying there's no way this could work, but I think a lot and I mean a LOT of calculations would be required..! Because you can't figure a proper port size and length of a box with a varying air volume... even a small inlet is going to greatly increase the volume of the box. Even though the valves are directional, air can still flow both ways... It would be great for cooling the sub and is a very interesting idea, I just don't think it provides any acoustical suspension that is required for a non free air sub to function properly...

[@onurmutlu6187]

Wow I'm looking forward to the next video

[@brandonandashleyofield9220]

This is borderline brilliant. It could, in theory, mean that you could keep your voice coil cool under heavy load applications. Meaning longer driver life!

[@arbinQES]

i am thinking about this before,,,. remember it today search on youtube if somebody done experimenting it ...boom .wow .this is nice.. love how you explained it.. wondering how i gonna apply tesla valve idea on speaker ...keep it up .. looking forward

[@cronicjohnson]

Love this have been trying to get my buddy to 3d print me something very similar for awhile now

[@96bansheepilot]

Science!

[@paulinebell4873]

if you make a follow-up, demo a frequency sweep. cheers!

[@scivirus3563]

theoretically you can build a cardioid Subwoofer for PRO audio application with out needing a secondary 180 phased Sub to cancel out rear bass

[@budgetaudiophile6048]

That's so damn cool! Now to figure out how we can do large low tune enclosures and apply this to subsonic frequencies for maximum impact, minimum chuff!

[@Dakoustics]

Yeah, tons of possibilities for where this type of stuff can be used, got some more experiments I wanna perform, though will require a new box, and probably the 812D for more power Might be able to convert test results into ideal port flare radius

[@budgetaudiophile6048]

@@Dakoustics Well if there's anything I can do from over here in 'Murica-Land to help speed up your Research and Development, just let me know. I love experimenting with audio and if we can build something truly deep digging yet high quality, that'd be so much fun!

[@419gcs]

He's glad I'm not the only person for the 1st I'm seeing this the 1st thing I thought is what would happen if it was port

[@muntee33]

You're missing one important aspect the convergence points needs to be configured so the cross section at that point is proportionally larger than the passage ways. The cross section of the divergent flow must be narrower than the cross section ot the 'main' line it is to diverge from, and when this accelerated flow is directed back into the main line in a way that the cross section of the 'main' line has already increased and the still thinner divergent line intersects the increased cross section of rhe the main line in a manner that its accelerated flow is maintained right up to the point that they intersect. It looks like a basic laminar/turbulent flow principle with basic factors such a boundary layers ect ect at play but there's more at work and the geometric configuration is primary to the function. It even goes beyond Bernoulli's formula/principle. I highly recommend anyone interested in the valve to become familiar with the principle and it's phenomena.

[@CJEnclosures]

I would love to learn how this could apply in SPL competition and how to measure for enclosure port area and tune.

[@Dakoustics]

Yeah, im interested to experiment with that aspect, could use it to time align stuff for biggest peak and no cancellation

[@CJEnclosures]

The struggle with proper loading at mic placement might be partially solved with this. Mic placement on the right side of the windshield for instance.

[@user-bu2sc1bm7k]

The Tesla Valve Tesla’s valvular conduit is mostly misunderstood as presented in much of literature and most media such as KZbin in recent years. This device cannot be called a valve if used as an inline flow resistor. It is usually but erroneously demonstrated as a ‘one way valve’ with fluid, be it gas or liquid where the pressure drop is considerably larger in one direction flow than in the opposite. To use electrical analogy, this is not a diode but a resistor, therefore, the word valve is inappropriate. The expected ‘valve’ action (check or non-return valve) is unimpressive if anything. Tesla originally construed his ‘valvular conduit for gas flow, and in fact specifically for gas under pulsating pressure. In this application, it may be called a ‘valve’ or a ‘fluid diode’. Gas under hight frequency pulsating pressure takes advantage of this clever topology and is free to flow in one direction with relatively negligible losses and practically no backflow. With careful design, Tesla’s valvular conduit is a true pulsating gas diode with no moving parts. An illustrative application would be an IC engine exhaust manifold. It should also be noted that this valve will have optimal performance at a single design point, i.e., temperature, fluid type, volumetric flow and frequency, so that any change of a parameter will have it operating off optimum. As for making a modern design, I imagine a cut and try method with FEA would be used. Otherwise, well done, interesting and informative video, thank you very much.

[@Stanleycfyeh1115]

how's the sound? does this can improve the low frequency or bass for music?

[@LexusYachtClub]

My first sub box did this for some reason, on certain frequencies the sub seemed to get sucked down into it

[@Dakoustics]

Not at all unlikely something like this was occurring

[@cybernaab]

Basicly, when the woofer is firing down it has a open port, and when it fires up it acts as its in a semi closed enclosure, to me that can never result in a good frequency response with any frequency, basicly you get random results depending on what frequency you play, probly the low range wil suffer the most since the low hz range wil produce more air pressure

[@jesus090982]

Wow dude! Super nice! i wonder if you know the diference between 2 boxes which are different in volume but same speaker and same tunning frequency . One bigger than the other, Can we hear a diference? Tanks 👋👍

[@Dakoustics]

Smaller will generally sound better than bigger, though losing efficiency is a major disadvantage. Too big, and it can have a peak, too small and it can lose low frequency output. Might be worth a video

[@popirat12]

I have an idea but i ask myself if it would work... Would it be possible to use smaller tesla valves in front loaded horn subs for air exchange and cooling of the speaker and chamber?

[@vincentrusso4332]

And God said..let there be light... sound is the key folks, or so says the cuneiform tablets from Mesopotamia that the Annunaki used.. sound should be a separate physics-based curriculum in schools. - Surry Virginia edit: a smoke machine be incorporated would of been nice to visualize the air flow properties

[@Stelios.Posantzis]

I think you may really be on to something. 🙂 Personally, I detest all ported speakers - I think they're all crap, regardless of price - but here I think you've touched on a number of possible applications.

[@jesusdiedforyouproofjohn3.16]

Praise JESUS for creating cool physics!

[@Nanogrip]

Hmmm, I think you've created a blower that uses a motorized diaphragm (speaker). I think you should study into this and make a patent out of it.

[@davidlin8214]

that poor paper towel

[@NoneyaBeeswax-kr3ww]

Exhaust pipe

[@muharremcan2662]

Mutlaka yanında bir balyoz bulundur. Binanın yıkılmaması için hazırlıklı ol. Siçimlerin aynı frekansta salınmasına neden olursanız tüm mahalle yıkılabilir. Tesla bu deneyde ofisini yıkmıştı.

[@dookiedave5375]

Wouldn't it act like a passive radiator

[@FSXgta]

A passive radiator is essentially an air mass simulator (simulates a port)

[@warmongerous]

Speaker is 2/10, my chipboard box with a 30 inch speaker produces a whopping 192 decibels of sound at a frequency of 24hz, top that one.

[@Dakoustics]

I yield

[@joshhayl7459]

🟦.... If a balance could be reached where, utilizing ONE valve and so causing the speaker to pump Just enough air out of a larger cabinet to maintain a certain level of damping on the driver, just a little more than a sealed box of the smallest practical size would exert, but to be able to have THAT level of damping occurring in a MUCH larger enclosure (which, could Never by itself provide the 'airspring' required for proper damping of an acoustic suspension driver!), should tighten the bass-envelope Considerably!... Okay, the speaker might require just a little more power, But this should result in a more definitive, "Tympanic" sound. I advise you from my own experience, for quite a number of years now I've been working on a similar design for a subwoofer, actually experimented with using modified fish tank pumps to maintain just a VERY small negative pressure in the enclosure! Unfortunately My shop of 30-years was destroyed in a hurricane and it may be some-time before I'm able to start experimenting again, You've definitely got the torch tho!..... RUN With It!!