Can You Hear Light? The Audio-Modulated Light Beam Experiment
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- เผยแพร่เมื่อ 24 มี.ค. 2019
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In this video I show you how to make an audio modulated light beam so that you can actually transmit audio through light beams. I show you how you can use the amplified signal from a solar panel connected to a speaker and shine amplitude modulated light on it in order to transmit sound signals! You can even transmit music through light. This amazing experiment shows you how you can even use this device to hear the lights in your room and even the light from your television!
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DISCLAIMER: Any experiment you try is at your own risk - บันเทิง
I can’t hear you, it’s too dark in here.
-Patrick Star
Soapy wuw
Well he's not wrong I guess...
😂😂 I haven't seen a SpongeBob quote in a while 👏👏
Patrick was smart all this time
*Next Video: **_Can You Taste Light?!_*
Lol can you do it with a laser?
Light tastes Lonely😢😭
Mmm my favorite tastless
Lol
Light is good for health as it's light
This is one of the greatest , most unexpected yet totally sensible concepts I've ever seen! I studied sound, graduated from the USC school of music, and have worked in the recording industry for 20 years and THIS has blown my mind. Well done. Further exploration and exploitation of this awesome concept is essential in the future.
Well, welcome to the 21st century! Do you know what we do nowadays? We can literally take digital samples of sound waveforms, basically converting them into numbers that are encoded as light pulses that travel down a glass fiber! Then, at the other end, the pulses are decoded and converted to voltage levels that drive a speaker so that they can be heard! For real!! No, I'm not kidding!!! It is actually a very interesting technique!
@@kenlogsdon7095 thanks smartass but clearly you missed the concept here that was displayed brilliantly and has nothing to do with the elementary digital 101 you tried to offer up in jest. But thanks for the laugh. :)
Being from South Bend IN home of the Fighting Irish, I would like to extend my heartfelt sympathy for your loss yesterday.
Go Irish! 🍀
Amazing! Who would think that light was musical! Simply amazing!
I could just imagine someone asking
"Hey what do you play?"
"I play light."
Radio Waves are light....you know?
Birds can see them.
@@Dr.Kraig_Ren No, birds can only see UV or infrared. No animal can see radio waves, their wavelengths are too large.
Light be like: (light noises)
Deaf people: shuuuut, I'm listening
Daniel Sambar its been a while since the last time I’ve seen you
People be like: deaf people exist
P
Flash it on a completely blind person for accuracy of results.
U deserve an osar for that
It still wouldnt be accurate becuse he would actually feel the heat from those 32K lumens and would associate that feeling with “sound”
SHHHT! I'm trying to listen...
That's impressive
btw, what kind of flashlight can connect to a tablet\phone\PC?
and what cable is required?
BLIND isn't DEAF ! The blind person won"t see the light but the device still will !
Something interesting would be a device able to recognize a color and SAY it !
This is exactly how TOSLink (fiber optic audio cable) works. You also just invented the visible light version of the Theremin.
He didn't invent it, these devices where mass produced, not d.i.y
@@ToxicBananaFish he combined multiple brands and items to make it. It's like using samples in music. He took pre made stuff and made somthing of his own. He didn't diy an iPad or aux cable or light lfo, but he diy'ed a theremin.
Hey! I have few questions
1. Did you bought the solar speaker or made it by yourself
2. Which app are you using to change lights frequency.
3. How did you connected the flashlight to the audio jack?
Thanx
BTW superb video 👍
I have the same question, wondering if he will respond 🙏🏼
1969 = *we will have time machines and flying cars in future*
2019 = *hearing light*
I think they had fm then too
This is better than a bunch of cars in the air
@@macyjean290 it's bad enough that people text and drive.
Stop the meme. It's not even funny anymore.
If you want it to be a little funny (but cringy as well) you should replace hearing light with flat earthers and moon landing deniers.
@@shayanmoosavi9139 It's really so depressing to think about, people have convinced themselves (or have been manipulated to believe) that the earth is flat, or that the moon landings and space travel are a lie, or that vaccines are poison that actively harm their children, when 60 years ago we had the world at our feet, quite literally. Social media is both a blessing and a curse, but we must figure out how we can educate people and get them to trust in realities and facts before they harm their children and society by their deliberate ignorance.
"Your eye only have a refresh rate of around 23 hertz."
Oh boy, you just started a war.
Anderson Luiz what u mean
I have an IDEA! Ok, so what would happen if you use different lens filters with this setup? You know like a uv filter and such?
@@astral2048 why is it different?
@@power-max I believe you tagged the wrong person. But good info, none the less!
@@V4p3rcl0ud lol stupid mobile app
But the real question is: WHEN will he accidentally transform into the biggest super villain in history?? 😁
What?!?
lex Luthor maybe
He already is in parallel universe.
Not before Kyle hill becomes a super villain first!
I'm only half way through the video so you may cover this, but, we've been doing stuff like this with lasers for quite a while. In fact, we have laser "microphones" that can be shined on a window of a building to record a conversation that is occurring in that room.
Can't you put colour filters on the solar panel to tune it?
Yes good idea,
🤣
That's immediately what I thought
Isn't there a dark portion in the middle of the light spectrum which could be utilized to transmit the signal further without solar interference?
By adding a capacitor parallel with the speaker's input signal, you can eliminate the white noise. (low pass filter)
"the human eye has a refresh rate of around 23 hertz."
r/PCMasterRace wants to know your location
Sonac yeah I thought about that to
@@sonacphotos I don't believe that is accurate, either. I have done experiments using a variable frequency squarewave generator driving an LED, with a frequency counter connected as well. I could run the freq up to 40 Hz before it looked like it was on constantly. This, I believe, is due to the fact that the thalamocortical cognition cycle of the brain is fundamentally a 40 Hz rate. It just can't keep up with anything faster, so it is perceived as continuous
@@kenlogsdon7095 Except I remember being clearly able to tell the difference between my PC CRT refreshing (=flickering) at 60 hz and 120 hz. I would estimate (based on experience) that the limit of what can be perceived as fliickery is probably somewhere inbetween the two. From what I remember, anything >= 120 hz definitely looked stable but going higher still felt slightly less straining on the eyes. Been years since I had a CRT though.
@@sonacphotos This fact is indeed wrong because it's badly understood/repeated. I think the 23/24Hz thing is the maximum refresh rate at which you clearly see and identify a different image poping and disappearing (like a subliminal image) or something like that. I don't remember exactly, but if you research on Google you can find better details as to why people still believe this.
But our eyes can indeed differentiate refresh rates (for animated scenes) much higher than 24Hz. There is a limit, I guess different from people to people, but it's higher.
The 23hz is about the rate we can distinguish individual flashes. We can see that the rate is increasing or decreasing much higher than this rate but we can’t necessarily distinguish the pulses. Basically this means that the old flash of light signal has not dissipated from your rods/cones before the new signal comes in. Below 23hz is where you can start to not have overlap between new and old signals.
Thank you so much action lab man. You are amazing. I always get excited when I'm about to watch one of your videos.
I love the way how you always ask 'stupid' questions and turn them into something unbelievably awesome
I had done something like this in the 1990s as a teen: driving an LED with a tape recorder's speaker output as a TX, and using another LED hooked to the microphone input of another tape recorder as the RX. They had to be facing one another very closely, but it worked 🙂
Would have been nice if you included plans on how to build this device and how to wire the flashlight to produce this light music. I'm sure this technology must exist somewhere though already and you're just demonstrating how to reproduce the end results. I could have lots of fun with this.
I have been telling people for years that sound is light, they certainly don't know much about EME, but I appreciate this video, to use as help when I get arguements, thank you!
1889: There will be flying cars!
2019: Light noises
Lol 😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂😂
This is actually more fascinating than flying cars.... tf
This is pretty cool and scientific though
@@shannonhelgers6469 plz no emoji spam
Cars weren’t even invented in 1889
Them: "That do you listen to?" Me: "Flashing RGB lights."
This might be your best episode to date.
Oh wow me and my cousin did this in high school to prove light could carry other “information” on its waves. Cool to be seeing this on here.
Awesome! 👏🏻 👏🏻 👏🏻 👏🏻
Every time your videos show exactly what's in your caption.
That's one of the reasons, I'm love your channel so much!
Keep up the good work! 👍🏻
Hey! I have few questions
1. Did you bought the solar speaker or made it by yourself
2. Which app are you using to change lights frequency.
3. How did you connected the flashlight to the audio jack?
Plz tell asap!!!
Thanx
BTW superb video 👍
This is amazing! Please let us know how you connected the flashlight to the aux jack and what components were needed for the solar panel speaker.
This was honestly Incredible , I will be making many projects based on this tech now ! Thank you so much! I love your channel !
This is so amazing. I love this kind of thinking. Incredible.
Hey my friends and I did this experiment( transmitting sound through light ) for a school project 😃 It was awesome
How did you do it?
@@Just_Sara just search "Li-Fi" on TH-cam 😃
The toy sounded like a Formula 1 car passing by lmao 6:27
More like a siren
V12 engine
Sounded more like
elevator action for NES
This is the coolest thing on your channel. Loved it.
I really appreciate your videos . You really do a great public service.
Well, radio waves are also light so it's not impossible :)
We were doing it all along.
Keep up the great work man. It was an awesome experiment.
Next video: can you smell dark matter?
6-digit weeb
Wow!!!!This experiment is awesome....I can't believe it works
That was amazing!!! I thought MAYBE some enhanced "noise" but although not HiFi, it WORKED!!!!!! Great video.
I was wondering if you could post the links to the items you used in the video? I would love to try this out myself.
Seth the Bard www.teachersource.com/product/light-modulator/light-properties
@@TheActionLab will you post a link on their description so we can order one thing like that so we can hear like because it's pretty interesting and I'm so amazed tell you could make sound out of light
*NOW - CAN YOU HEAR LIGHT?*
*NEXT - CAN YOU SEE SOUND?*
Smartereveryday did a video on seeing sound with a camera
Definately
Probably if your drop can hook you up
Yes you can.
Cymatics
Love your videos and how you explain things!! This was really interesting to watch, thank you :)
What I like most on this channel is the unintuitive practical examples you use to explain things people that like science already know, but never thought it was possible
Basically a optic Fiber or IR tv controller , transmit information with light ;)
I was expecting a test with an infrared remote controler !Try it it's fun ! You actually can hear the coding.
@nonothebot That’s a good idea!
most IR remotes use a carrier wave of 38khz which is above our hearing but we might be able to hear the signal itself which i think is usually only a few bites per second
@Isaac what is heard is, that which is _modulated_ on the carrier. I.e. the carrier is switched on and off at rates that encode the codes being sent.
That is what is being heard.
Amazing video!! Keep up the great work!!
This is perfect to explain what fiber transmission is. There is a very old in/out audio port based on red light, I used it on my Sony minidisk. This 2 are point to point system.
I would love to see a wearable version of this. A battery pack, a small clip on solar panel, and a headphone jack. I'd love to know what you'd hear through the day, it'd be like extending your electromagnetic range of sense.
I am going to use an arduino to make a monitor fps mesurement device by counting the light pulses from the screen
Thank you for this video, and btw can't wait for next action box (if there will be)
AKA a "frequency counter"?
@@kenlogsdon7095 *insert mind blown gif*
But yes exactly like that I suppose, but then DIY.
This is an awesome experiment. So cool.
This is amazing, wow!!
That was awesome!! I loved that!! SO COOL! 💟💟💟
can you tell how you made the amplifier for the receiver of light to sound thingy
You could probably just connect a small solar panel to the input of an amplifier. In this case looked like a MOSHI Bass Burger speaker. You could say use computer speakers.
One of the best video I have ever seen in TH-cam ever!
this was educational
and useful at the same time
Pretty awesome ! What about using a laser to transmit ? Could you go longer distances and have less interference because it’s more direct ?
Why not a photo diode over a fiber optic line? This is very old and primitive technology.
Next video: Can you Access WiFi underwater? i.e.if you and the WiFi are separated via water, or you are underwater. Alternatively, what if the modem is underwater, will you be able to connect?
Keep it up man I enjoy learning new things from you.👍👍
I am genuinely impressed.
Damn 0 dislikes, this man must be one of the people with 0 haters
You literally say impossible things, then I think to myself, holy shit its the action lab. It must be true 😂😂😂
This is awesome!! 😮
This is actually really profound! Amazing
It's already been done with optical audio cables ;-)
So that is how the möth finds the lämp
how did I find you again?
old meme
This is prolly the coolest most satisfying video that I’ve ever seen. I’m freaking out right now.
This was a very popular project in many electronics magazines in the 70's and 80's. The transmitter was extremely simple. A small mirror was glued to the cone of a speaker. The receiver was a solar voltaic cell connected to the input of an amplifier/speaker. The project was conducted out of doors and the sun would be reflected onto the solar cell from a long distance using the speaker's mirror while audio was feeding the speaker. It worked quite well.
I want to buy the flash with aux cable you bought to make this video.
Please mention the link in reply.
Thanking you
Hes not going to reply
I'm intrigued by that too, waiting for an answer whether it is a flashlight on its own with this feature or a modded one.
Well I think one could modulate the LED's current with a rather simple circuit, using maybe just as much as an opamp, a mosfet and some resistors, don't know about the bandwidth though. It'd be a handy little project to build.
Sarang Aerials www.teachersource.com/product/light-modulator/light-properties
Can you please tell the names of apps you used,
I will try this for my science exibition
BTW
You are creative!
Wow this is amazing! 🙂
That would actually make a great short ranged transmitter, and a good improvised one! I might try that myself
Wait a second where do you get a flashlight with an audio input at????????
Bugs Bunny when you get the answer tell me too.
Curious 🤔🤔🤔
You can make one easily, just hook up a transistor in switch configuration to an LED and get the amplifier signal with the battery connected to the led.
It hard to explain but easy in practice, btw if you're not so good at electronics you can simply connect a small led to an amplified audio output like a big speaker system, take care of the polarity tho!
You make one
@@indogamingyt4792 damn thanks
Andrew Huang be like:
Let's re-sample this!!!
yo man u nailed it once again....
That was an incredible video. Thanks bro
How can I make one of em flashlights, I already have the solar panel and speaker
2:56 dj snake want's to know your location...
Lmao
The best ActionLabs video ever
This video is F.. awesome,
Added to favs..
That was the most literal white noise I have ever heard.
Dork ;)
Can we have the link so we can buy the speaker ourselves?
Yeah, want it!
Okay that was actually awesome
This is the coolest video ever - you inspire me soooo much
(Plus its waaaaaay better than my normal science class)
plz try to use reflected light
Prove that different color light has different wave length with this divice and frequency meter
that is...an interesting idea
Great video. This reminds me of one time when cleaning my work bench about 15 years ago. I saw a 2N3055 transistor and I wanted to know if it was working before I put it away. I looked around for what to test it with and right next to it was an MP3 player and a laser pointer. Next thing you know I had the laser pointer pulsing with music. Then I hooked up a photo resistor to the microphone input on my PC and I could hear the music clearly over the laser. Now I have the sound to laser setup mounted in an altoids can with audio jack and a 1/4" tripod mount. All because I wanted to test a transistor one day.
Awesome experiment
Then how can we differ b/w 24, 30, 60, 120or144 Hz display
I think our eyes can differentiate color changes much faster than flashes.
Eyes (and brain) doesn't have a real refresh rate like for example screens and cameras. Your brain doesn't process your full field of view 23 times a second. In reality your eyes constantly picking up small details of what is in front you and your brain builds up a mental model and an image of your environment based on these small chunks of information, its memory, expectation, etc..
They say it has ~23 Hz because if something changes faster than this then the brain consider it as continuous movement. It can't distinguish between individual frames from this rate and above. That's why we can watch movies and videos.
But the faster such a digital change is the more fluid it is preceived. This is why we can tell the difference between a 25fps and a 144 fps video.
@@dabidoHUN thanks for the explanation , so technically the eye has a higher refresh rate but the brain perceives the thing as in motion and not as flashing
Yes, kind of. The eyes themselves constantly receive light and transform it to electrical signal. So they don't have a refresh rate literally. Or we can call it infinite :) But they have kind of an inertia. It's called retinal persistence or persistence of vision. If you look into the flash of a camera in a dark room you can't see for a half second and even if you regain you vision you may see the afterimage of the flash overexposed on top of the image of the room for seconds.
Most of the lightbulbs used nowadays are pulsating. Tipically at the frequency of the mains which is 60 or 50 Hz. Still, we see it a continuous light since our eyes averages out its peaks and troughs due to this retinal persistence.
So it's not really a refresh rate but a constant stream of information with some "smoothing" .
This is why we consider something as moving when we watch TV. Because our eyes (and brain) smooth out the sudden transition between frames.
It's like when someone is talking in a large hall. Although you hear every word you also hear the echo of the previous word.
The trick is: although our brain consider it as constant movement it still recognize its "jerkyness" just doesn't care.
(If you think about it motion picture is pretty young compared to the evolution of human vision. So our brain is simply not adapted to frames. It simply does make sense to it and the closest thing to 25 different images in a second is actual movement. So it consider it as movement 😁 In reality we always trick and exploit our brain when we play games or watch movies.
I hope it makes sense.
Literally everyone: uses light to transmit internet across the whole globe
The Action Lab: WOoooooOoooW lIGhT cAn TrAnsMiT mUsIcAl DaTa
Wow! You are nuts! I love it!
Watched the whole 2min ad ... lets appreciate this lovely man
Melts off ear*
I still don’t hear it!
Please can anyone tell me where will I get this gadget???
And how can I make it???
It will be a good science project
I took the solar panel out of a garden lamp and connected it to a pair of headphones. No circuitry or batteries are needed. I managed to hear hum from some LED bulbs that have a bit of flicker. I also listened to the TV screen. You can get pretty interesting results. Have fun!
www.teachersource.com/product/light-modulator/light-properties
This is the most interesting an exciting video ever watched and uploaded
Nicely done! I have seen this done with lasers before over very long distances, but never a regular flashlight.
Sir i am fan of you, I'm from India
Oxygen is paramagnetic, how we prove it?
Take some liquid oxygen and put a magenta near it
The video showing this
th-cam.com/video/YJqvN4_2rxE/w-d-xo.html
Take some liquid oxygen and put a magnet near it
The video showing this
th-cam.com/video/YJqvN4_2rxE/w-d-xo.html
Isn't current alternating at 60hz or 50hz not 120??? I think you meant 120v
I think u r from India
There are two peaks per cycle at, one positive, and one negative for a complete cycle of AC.
The Light doesn't care what the polarity is and will light at both the positive and negative peak of a single cycle, hence 120Hz, since there are two peaks per cycle.
Cameron Whitaker that is wrong because 1Hz = 1 cycle (high and low). Therefore 60Hz but it will blink 120x in one second.
Martin Mali ahhhh thanks bro
Transporting information using light.....?
That’s soo cool!
I feel like I learn more and more secrets of our universe from Your channel...
Thank you Action Lab!
Think about it: The same thing happens with car radios. The radio picks up frequencies and translates that into sound.
Can you hear light?
You are asking question like
can you see sound?
I can hear light. Some people can see sound.
Maybe no...Cuz frequencies. Sound has a higher variety of frequencies, and we cannot see that frequencies cuz our eyes cannot perceive the changes.
If we reverse the device that he made, it would consist of a microphone and a flashlight. Mic to pick up sounds, circuit to convert sound to electricity and flashlight to flash the light at those specific frequencies. But like he said, our eyes can only refresh at around 23Hz, which means any frequency higher and it would look like a constant stream of light. But if we take our reverse-device and place it in front of his device, we will notice that the devices can pick it up. And maybe pick up a bit of delay, causing some noise and maybe that repeat effect in music with a much shorter delay, eeeeeeeeeeeeeeeeee! Oooh, the possibilities!!!!!!!
But if it was just a joke, then...uhh...sorry for the long explanation?
Try LSD and you'll be able to see sound
@@djviperx try dmt and sound will see you.
I saw sound and heard light...
In my dream
How to build this will be an awesome experiment! That was so cool
You could literally turn your whole house into a secret message center, or play music everywhere in the house and just carry that along with you. This is the coolest thing I have seen!
Thank you for the video!