How do speakers work?

[@underneonloneliness2]

Still mind blowing how that works!

[@kriss3d]

Yes. And here's the great part. It works in reverse ad well. If you vibrate the membrane by air ( sound) it will produce a changing voltage across the wires. That voltage will change magnitude depending on the volumen of the sound and the frequency of it will reflect in the frequency of the voltage of the wires. And that's what a microphone is. It's a speaker in reverse quite literally.

[@ahmeda5394]

@@kriss3d wow comment from 7 years and the replay is from 7 days ago amazing

[@anon5582]

@@ahmeda5394 shut up

[@popcat2309]

@@ahmeda5394 yup time flies doesn't it

[@paulxavier2846]

@@kriss3dwtf🤯😂

[@hellyea489]

Always love explanations like this, with actual working models. Great video, thanks for your effort!

[@wesleyelder4622]

Years of questions answered

[@ThePS4Gamer2014]

Wow I never knew speakers were THAT simple, blew my mind! Thanks for the video!

[@speakersr-lyefaudio6830]

Fundamentally they are, but they can get really complicated if you want them to sound good.

[@jjhack3r]

A light bulb is even more simple. Now go make one that you will trust to be the only thing keeping you from wrecking your car at night. Simple doesn’t mean it’s practically easy. A soda can is also simple, but you will never even be able to make one on your own lol

[@joedufour8188]

@@speakersr-lyefaudio6830 As complicated as they may get, they all still work on the same basic principle.

[@kriss3d]

And a microphone is exactly the same except you vibrate the membrane and the output is voltage in the wires.

[@Manace_lifestyle]

@@speakersr-lyefaudio6830 its crazy to think you typed this 5 years ago

[@michaelmartinez7243]

perfect example of how fractals and geometry are very useful in technology

[@rando3749]

Not once have I seen anything like this as a kid. That would have changed my life.

[@gabequittem]

10 years later, and this is the best demonstration i have seen

[@iangomez694]

Awesome! As a young pre-scientist I love when I-m able to find videos where phenomena are explain. Thanks a lot, I'm using this in the next science fair, only with some personal upgrades ;) #ThanksForTheInspiration

[@thetpaingzaw615]

Now I know exactly what I want to know. The best demostraction.

[@aminnima6145]

Awesome...i love such simple and elegant experiments

[@hemanth6951]

❤️❤️❤️ beautiful practical experiment

[@NeoRipshaft]

Very cool demonstration - would love to have gotten even more in-depth coverage of the pre-amp and post-amp signal and if there's anything neat going on there beyond simple amplification... I suppose there would be modulation effects of various sorts available for EQ/balance and whatnot =O

[@Mezase]

Excellent explanation and working demo 10/10

[@TimpBizkit]

In more detail, a wire passing current that is sandwiched between the poles of two different attracting magnets will move at right angles to the magnetic field according to a "left hand rule" where you point your first finger from North to South direction, have your middle finger at right angles to your palm to denote conventional "current" from positive to negative, and your thumb in the "thumbs up" position. E.g. if north pole is on the right and south pole on the left, positive to negative in the wire is pointed away from you, then the wire will move "up" in the gap. A current in a wire will have a circular magnetic field around it (field lines in an infinite hula hoop around the wire with no "North" or "South" termination points). The direction is clockwise for conventional current moving away from you. The field is reinforced on the bottom by straight permanent magnet field lines from right to left, pushing the wire "up." The metal disc on top of the ring magnet is to conduct one pole's field lines to the outside of the coil gap. The metal "top hat" on the back of the magnet is to conduct the field lines from the other pole to the centre of the coil gap. Now you can turn a ring magnet into the optimum magnet for a speaker which is a horseshoe magnet with the ends bent in to face one another with a small gap, and lots of these magnets filed into wedge shape and glued together until a ring is formed. The coil is so you can have lots of parallel wires moving in the same direction and magnify the force. You can build a more primitive version with a simple neodymium cylinder inside the coil. Although the field lines won't be as concentrated in the direction you want (at right angles to the coil), the strength of the magnet will still be able to give a decent output. I did actually build a speaker but it had a vertical ring for a coil as I only had one pair of magnets to face each other. The other half of the coil wasn't in the gap so it did lose efficiency, but I would have needed another pair of magnets the opposite way round to not have it cancel out. I used a resistance meter so I could work out how much wire to use without overloading the amplifier.

[@tastenheber]

That's the beauty of analog electronics.

[@makavelee4768]

Neat demo, only issue is in a speaker the permanent magnet is fixed and the coil (electromagnet) moves. Very similar.

[@mattstrom5875]

Is that not whats happening here? I was assuming the sound was being created by the coil moving and vibrating the cardboard, while the magnet he's holding is "fixed" by his hand.

[@kyleclarke4845]

​@@mattstrom5875yeah that os what's happening, the sound comes from the cardboard moving, the permanent magnet (although being moved around) is in a fixed space relative to the movement of the electromagnet (the cardboard) which is vibrating very quickly

[@KillaDeejay]

All this science and the only thing I accidently achieved back in my day with a magnet was messing up one of my tv's by leaving some on top.

[@AYRTON-CONNOR]

I still have questions lol how does a magnet and copper coil transfer all those sounds we hear through our speakers? I understand the concept but you would think it would just produce basic sounds, how does back and forth vibrations create music lol

[@AYRTON-CONNOR]

So basically sound is vibration and vibration is sound, and the copper and magnet interact thousands of times a second to create different sounds! In my first comment I just didn’t think about how quick these vibrations where happening!

[@98bballstar]

im high af and you just unraveled the universe in front of me @@AYRTON-CONNOR

[@kamalgurnani924]

How did that song start to play? Could someone please explain?

[@haydenhoodless2055]

Whenever a current is applied to an electrical conductor, it generates a magnetic field. Copper is really good at this. Changing the amount of current you put in to it changes the strength of the magnetic field. When the magnetic field is generated in the copper, it's attracted to the magnet he's holding, but because it's attached to the cardboard, the cardboard is moving too. Now, remember that sound is vibration. If you hold a ruler off the edge of a table and hit it, it vibrates and makes a twanging sound. The faster the vibrations, the higher the pitch of the twang. In this, the cardboard is kind of like the ruler. The current applied to copper attached to the cardboard is basically turned up and down really really quickly, like hundreds or thousands of times per second quickly, which causes the cardboard/copper to fluctuate it's distance from the magnet at the same speed, essentially happening so fast it that it makes sound.

[@thadyoung2553]

This is so fun!

[@turbo3089]

What happeneds if it's a solid sheet of copper except for like the handle so in a safety precaution kind of standpoint you don't get shocked

[@arjumandvillagelife]

Great❤😊

[@world-traveler880]

This is wicked cool!

[@Manace_lifestyle]

i love speakers but i love to learn about them even tho i already know every thing about them

[@mcnimi]

where did the sound came from in the end? from the piece of cardboard?

[@Gabo_Gatchava]

mcnimi from vibration of that tape, interacting to magnet by electric power from amplifier (I think I am right :)

[@jubjub567]

wow, i really wanted to know what dave from sports was going to say smh

[@patrikkolaric2485]

does it work with aluminium foil too

[@ImaginationStationOH]

Patrik Kolaric Yes it does. The copper tape was just easier to work with since you can apply it to a solid surface. Our first prototype for this was just a layer of aluminum foil on a sheet of paper. Give it a try! --Carl

[@patrikkolaric2485]

tanks

[@lightskinantics4200]

Thanks I learned how to make my own speaker 🔈

[@phdgkos47952]

so like, magnets = voltage?? and surface area of current = amps???

[@windyzhou7957]

Anybody know the background music?

[@esoteric3743]

***** Darude - Sandstorm

[@initialb5009]

+eso teric liar lol..

[@world-traveler880]

Happy by William Pharrell

[@lizlugo8962]

Super cool

[@samgaekwad]

The guy in white laughs like Jimmy Kimmel

[@SuperBillwoo]

I’m still failing to understand how a piece of cardboard can sound like Pharrell

[@StoneStraiff]

That is amazing

[@iamTovan]

o o o, its magic. you knooowww

[@nishanttomar7826]

It's awesome

[@manpreetsingh5949]

What song

[@Igrouve]

Happy by William Pharrell

[@nebulai9587]

Happier-Marshmello

[@DecoyAUT]

That's black magic

[@saltypdk348]

Just simple science

[@handsonfire6113]

this video helped me make an informative speech thanks

[@Chungustav]

He must have forgot or ran out of time to use the plastic cone on the table to concentrate the sound I would have been cool to see too

[@dalton6173]

This confuses me as to how it replicates the sound. I mean the cap was not moving enough for the human eye to see it yet it was creating sound.... I understand scientificly it is a super simple speaker however average human brain makes it seem more complicated.

[@tricky83]

Woah so that's how speakers copy songs and boice Edit:I mean voice not boice

[@jagben]

isn't this a short circuit?

[@ImaginationStationOH]

Yes, to a degree. There is some resistance in the hook up wire, and at the alligator clip contact to the foil. The copper tape does get warm after a few minutes. So, not the best design for a long term use speaker. However, it is a nice way to demonstrate how a speaker works. -- Carl

[@rricd]

Nice

[@initialb5009]

cool.

[@AdelSus-j2d]

Hello, fashion lovers ❤

[@deepakubhoo7406]

wow!

[@Peterpeter-hr8gg]

Wow

[@nintendy]

Okay - so now we all know that companies have been ripping us off for years....! I always wondered why Speakers are SO expensive!

[@BrandonshanesProductions]

Most likely the magnet causes it to be so expensive.

[@leoibarra1593]

Fixing ION speaker

[@Badbufon]

but how do magnets work?

[@sharpscorpion5430]

whoah

[@ishwaitforitmail]

hi

[@evann5451]

Does NO ONE show how an iPhone speaker works?

[@xxzenonionnex7658]

I works exactly the same as all of them do

[@beenachand5763]

Listening from phones speaker

[@izzyizzm8761]

This is a clue on opening your 3rd eye!

[@julianluna8688]

No

[@neolyth]

wtf xD now you have to explain

[@izzyizzm8761]

@@neolyth ancient Egyptian head gear is made of what?

[@izzyizzm8761]

@@neolyth copper! Gold is too heavy! Deuteronomy 8:9

[@b_56_tarangtambe76]

Over simplified

[@ytubeanon]

Over critical

[@syntaxerorr]

Junk tools. Has a 15 or 18 inch subwoofer.