Sound to Electricity: How do Microphones and Speakers Work?
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- Опубліковано 1 лип 2024
- Imagine turning turning sound into usable electricity! Wouldn't that be amazing? Well, it already happens everyday, watch this video to find out how!
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Script:
UA-cam, it's Cram. Sound. It is amazing, allowed us to perceive the world through vibrations in their air. And electricity, flowing electrons that power our modern world. These two seem like they couldn't be more different, but in fact they are different forms of the same thing. They are both forms of energy, and can be converted to one another. How? To figure this out, lets use the microphone as a starting point. It takes sound in from the top part, which has several holes in it, processes it somehow, and then sends it off as electricity through a wire.It seems simple enough, except for the processing part.
Microphones are a kind of transducer, something that can convert one form of energy to another. In this case, it is sound to electricity. There are many kinds of microphones, but one thing they all have in common is called the diaphragm, a thin piece made of a material, commonly plastic, aluminum or paper. This acts in a similar fashion to our eardrums, it vibrates because of sound waves.
Ok, but our eardrums don't convert sound into electricity. We're all familiar with a simple electrical generator, right? Basically, there is a coil, typically a conductor like copper, and inside the coil is a magnet. As the magnet rotates/ moves, an electrical current passes through the coil. This is because of electromagnetism, and electricity can be used to make a magnet, the opposite is also true.
So when this material vibrates, it is attached to the magnet, therefore moving the magnet, thus creating an electrical signal. This signal is passed through a wire to a speaker, or anything that plays music. This speaker is also a transducer. It does the opposite though. Remember how electricity can be used to create a magnet? Well, that's what's happening. The electricity flows through the coiled conductor inside the speaker, in turn moving the magnet. This magnet usually moves a cone, instead of a thin material, which produces the sound. This is why larger speakers typically have more bass, since the cone is bigger, larger wavelengths can travel further, thus having more "oomph" and cleaner sound.
Wait, so if sound can make energy, why don't we use it as a renewable source of energy? That's because the amount of energy is extremely low, too low to even bother with. Or it would be the end of the energy crisis we face today. I hope you enjoyed this video as much as I appreciated you watching. Subscribe to stay up to date on all my latest science videos, and until next time, Cram Out.
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No
Our ear also converts sound into electrical energy which then travels through neurons to the brain
i have probably spent dozens of hours wondering how this works, this really gives me some peace at mind amd helps me understand it
Me too Aiden. same curiosity, knowing this one knowing everything.
Dude that was a really good explanation!
bruh i found him
This was super helpful, thanks!
Thank you. was wondering how it worked for a long time :) couldnt find a good video anywhere :)
Great video, man. Keep it up.
Duuuudde i lovvve thiss its clear and short , keep it up man
Hey but here's a thought about energy. Heat, light, and sound, while they are different aren't they generally the same? Since they are all generated by motion and/or vibration. Light=acceleration of electrons producing photons, heat=vibration of molecules, and sound=vibration of air.
One is stronger than the other and produces more energy
Love it..short and simple
Dude you are brilliant!!!
Well explained!
Man thanks simple and short i understood every word
Great video!
Imagine sound turning sound into usable electricity! Wouldn't that be amazing? Well, it already happens everyday, watch this video to find out how!
thank you very much you are a great teacher thankyou!!!!
Can someone buy this converter?
Thanks for the informative and helpful video, can't the cosmic sound reaching the earth help us generate some electricity?.
Great, thanks 👍
Nice explanation 👌👌
CramBoom ur my idol
Great video :)
It's actually possible to stock electrical energy after transducing sound to electricity. People are already working on it.
slow down and keep picture clear !
I never appreciated how much stuff is actually used for me to call my friends the game word over discord
I have a hunch that everything is wave-like including electricity (the flow of electrons)...this means matter too
yup
the particles in solids are not still.
there a less particles (and thus, more space between particles) in liquids and gases allowing the particles to move further, but in solids they do not move nearly as much, which is why (relating back to the topic of the video) sound moves faster through solid objects than it does through air and water. without the tiny amount of space between particles allowing them to move within a solid object, you would be unable to hear a knock at your door, etc, etc.
what about onnecting a amp to it
Yes, sir. you made me log in. :P
Would that Transducer be able to light a light bulb??? Or anything?
What if I will use sound energy to charge my mobile phone?
what u gonna do scream at it ?
Call the land lady from kung-fu hustle
Im already trying to make it
But a reverse thing so the more quite you are when speaking the more battery
Psycho Kiko how are you getting on with it? Let me know please
too little energy potential, indeed. But you do end up absorbing the sound right? how about a noise-insulating device?
The was the microphone processes the sound is by making the sound bounce back and forth and then it processes through the wire just so ya know ;)
What about sound-powered phones? The listener hears the speaker in the same volume, showing that the ability to transfer sound to electricity and back is essentially lossless, thereby suggesting that sound harvesting is viable. Everyone parrots the claim "Energy harvested from sound is too low to bother with," without ever doing any tests to bolster the claim.
Microphones convert sound energy to electrical energy, as information are send in electrical signal across our nerves, doesn't it means that when we hear sound, our ears can actually convert these energy? I'm just saying I don't really know much.
Got your email man, this is awesome thank you :D
Why is the amount of energy produced by sound is too low??
I was watching this video hoping I'd find out about that (Somehow) :D
u gotta love science
If we can except that a microphone has a maker, why can’t except that we have a maker? Things don’t just happen because they need to, they happen because someone made them happen. Have a good day.
Guess who saved my school projekt :D
Im watching a 2013 video in 2021
Technically, the coil moves, not the magnet
I am not sure if it varies between different types of speakers/ microphones, but I know for sure that for speakers, it is the magnet that moves. This is because the coil is part of the wire, and there would be many inconsistencies, since the wire is creating an external resistance for the coil, so the coil movement would be different based on the position of the connecting wire. Please correct me if I am wrong though.
CramBoom Hi there - I guarantee that it is the coil that moves inside a speaker (all speakers). Just to to eBay and search for "speaker recone kit" and you will see the wire coil is permanently glued to the speaker cone (the part part that moves). Speaker coils are specifically designed (material, thickness, number of windings, etc.) to be wound as to minimize inconsistencies - then the cone is designed to match the coil as to further minimize any frequency deviation. Thanks and good luck to you.
Slow down!
مائیکروفون ساوئڈ انرجی کو الیکٹرک سگنل میں تبدیل کرتا ہے ۔۔۔