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How Microphones Can Record Light―Recording My Voice As Light Waves

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In this video I show you what light sounds like in a microphone by performing my very first recording of my voice being transferred to a microphone through light.
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*Any experiment you try is at YOUR OWN RISK. The Action Lab assumes no responsibility for any injury if you attempt anything you see in this video or on The Action Lab channel.

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26 авг 2024

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Комментарии : 1,1 тыс.

@cle4tle 4 года назад

the light is being- long pause..... the sound is being transmitted through light

@TheActionLab 4 года назад

Lol, I messed up talking but I wanted to still use it because it came out pretty good in the audio output

@chrisrenfro2058 4 года назад

Im glad he keeps his mistakes in the videos. Makes him more relatable.

@protoplasm4985 4 года назад

@@TheActionLab something i never thought i would see a educational channel say lol

@dimisegers3095 3 года назад

@@TheActionLab well at a greater distance u would have to use a device to convert the frequency or it would sound nothing like a voice at all. Because the frequency of the laser touching the microphone will slow down if u increase the distance, I think if u would have a smaller diameter laser and place it closer to the source that vibrates it would sound more like an actual voice. Or I could be wrong 😉😁

@protoplasm4985 3 года назад

@Vertex Gaming lol

@y33t23 4 года назад

*Puts laser in front of neighbor's window* _"Alexa, call the police."_

@______373 4 года назад

hahahahaahaha

@shivanandupadhyay3414 4 года назад

Alexa play never gonna give you up

@darishdias 4 года назад

How cool would it be to record Morse code?

@neillunavat 4 года назад

Haha

@leafninjazyt6173 4 года назад

i hope someone programs a device to do this

@disorderlychinshapes4246 4 года назад

X Æ A-12 when its his turn to read in class:

@hydrofiber 4 года назад

BlueChillz underrated

@the_wingedone 4 года назад

うぁたれようさいんg！?

@futuristicdew11 4 года назад

comment above says "whatareyousaying!?" spelt in hiragana

@danwitavan5146 4 года назад

Futuristic Dew XDDD

@Razorcarl 4 года назад

@@the_wingedone you should use katakana

@samhayes-astrion 4 года назад

"This sounds very creepy." The sound: _amateur French horn noises_

@silvasen1985 4 года назад

hon hon

@archungus 4 года назад

Oooooohhh nooooooooooooooo😂

@silvasen1985 4 года назад

@@ominous4 omg are you the spy from the 2007 valve game tf2 who wears a mask and can cloak

@piloo8485 4 года назад

Sam Hayes au clair de la lune euh mon ami pierrot prête moi ta plume euh pour écrire un mot

@yuricock 3 года назад

Walter he’s off to visit your mother

@alfredxsiv 4 года назад

Aliens: "We picked up a pulsating light from lightyears away" the decoded message: 5:15

@gewoonvictor6163 4 года назад

No wonder they’re staying away

@joe_croupier 4 года назад

@@gewoonvictor6163 lolz ... trump lazor wall here we come

@youneedsomejuicelol5325 4 года назад

I hope this comment gets over 500 likes

@beactivebehappy9894 4 года назад

@@youneedsomejuicelol5325 more like 1K

@HmmYesInteresting... 3 года назад

The alien is telling us we've been using the wrong comunication device

@BoffinGrusky 4 года назад

I hear voices like this in the basement of my eighteenth century farm house all the time. Should I be worried?

@ZikedY 4 года назад

Assuming this is true, yes. Because Someone who shouldn't be there is there, or some machinery is broken

@TheActionLab 4 года назад

It's just the ghost of Alexander Graham Bell...

@BoffinGrusky 4 года назад

@@TheActionLab You may be on to something. The voice keeps saying: "Mr. Watson, come here - I want to see you." My last name is Gildersleeve.

@jafinch78 4 года назад

Acoustic Hailing Devices maybe make me worry along with active denial systems that are actively denied with drama compounded and concealed going back to the 1950's and probably earlier in not only Moscow. I mean Allen Dulles brother died from the radiation poisoning... granted probably was nuclear also and not just the microwaves or ultrasound or who knows what RF?

@jafinch78 4 года назад

Strangest is when they're talking through the house cracks and creaks. I've even heard where radio operators are aware of methods they won't typically disclosed and can use multiple stations to triangulate on a victims house nails and simultaneously, I guess phase synchronized somehow, beam form to rattle the house and make a target look like they're emitting unlawfully intentionally to make complaints. Weird also is the talking appliances with compressors like the fridge and freezer. Man, I'm an exception of the few in some circles and many in others though who have certain background networks connected to Tech.

@theyo9619 4 года назад

“We aren’t sure why this happens” *Proceeds to explain a perfectly reasonable explanation.*

@motifity3416 3 года назад

This could actually be a valid way to talk in space without the need of radio connection

@JusticePreyHDM Год назад

Making sound travel at Light-speed

@amaiaa8815 Год назад

Laser and Radio waves are both EM radiation. They move at the same speed. Radio however is more suitable for this purpose.

@Robisquick 9 месяцев назад

Hahahahah good point. Exactly dude.@@amaiaa8815

@XxGarfieldxX_CatxX 7 месяцев назад

Radio operator: Do you hear me? Satellite: mmMrmRRmmmrRMMMMRRR Radio operator: wtf

@anormaltoaster3691 4 года назад

the sound of his voice through the laser makes him sound like an animal crossing character

@aeonsmcml 4 года назад

This might give matpat an idea for a theory

@koibubbles3302 4 года назад

Animal crossing characters speak light confirmed

@bl6973 4 года назад

But that’s just a theory *_A GAME THEOR-_*

@aeonsmcml 4 года назад

@@bl6973 AAAAAAAAANNDDDDD cuutt

@jherazob 4 года назад

Charlie Brown's teachers

@Kommii_ 4 года назад

Ahh yes, the sound of light.

@aakashyadav-cn3hf 4 года назад

wait,thats illegal

@kristinejoybueno8102 4 года назад

Light of sound.

@EXOPLANETnews 4 года назад

Hey guys i have an interesting channel about space if you like it do subscribe pls visit once 🙏🙏

@spicemasterii6775 4 года назад

Then there's the color of sound.

@slolilols 4 года назад

*_Komi san_*

@aifangs2661 4 года назад

4:48 wait this is that’s mosquitos sound like maybe they are trying to tell us something

@alisonaussie4995 4 года назад

They’re saying, “hold still tasty morsel”

@Lreenzky 4 года назад

*Always has been*

@diabloflare8304 4 года назад

It sounds like a giant mosquito can talk!!!

@andreweustace2780 3 года назад

Brilliant

@notchristianhodges8123 4 года назад

I think the clipping may be partly due to the mass of the mirror. It's not vibrating perfectly with the speaker because it takes time to accelerate. What if you connected the microphone directly to the laser rather than bouncing the laser off a mirror. Would an analog signal work as well as a pulse?

@maudiojunky 4 года назад

Yeah a PWM laser driver should work a lot better. The microphone itself will act as a low-pass filter to remove the carrier frequency.

@charlieangkor8649 4 года назад

Or maybe, in our 21st century technological age, he could unlock his smartphone, open a browser, go to www.google.com, type "how to audio modulate a laser pointer", and click the first link and he would get this: "The trick to modulating a laser is to put a 10 ohm resistor in series with the batteries and couple a sound signal across the resistor through a 100 uf capacitor from an 8 ohm audio source." I actually did this with headphone output of my laptop (32 ohm or so) and it was powerful and perfectly undistorted. No need for any PWM.

@maudiojunky 4 года назад

@@charlieangkor8649 You must be fun at parties.

@HumanBeingSpawn Год назад

Yeah. I Think some sort of highly reflective membrane would work better since the elasticity would provide the best sinusoidal effect

@1kpingkid271 3 года назад

So- light is also a way to transmit sound.

@SlavTiger 4 года назад

I have a hypothesis going into this video: Light acts as a wave and a particle. Photons can actually exert a tiny amount of force when they hit something. Pehaps this can be amplified with more photons (ie a laser) and by modulating the beam with a frequency (ie sound) the light can be used as a carrier wave, similar to radio.

@inewyork5592 4 года назад

It once was: Light vs Sound Now it is: Light has Sound

@gameguider321GO 3 года назад

"And used a little bit more complex setup" **attaches phone to a tripod** NASA: this man's a genius!

@gurintto 4 года назад

It seems like with this method there is no encoding of amplitude, only frequency: amplitude just makes the laser go further away from the mic so is lost information. I think you would need to brighten & dim the laser to vary the amplitude, as well as have it sweeping for frequency. Edit: or pulse width modulation of the amplitude

@SameLif3 4 года назад

So it wouldn’t work with a invisible laser ?

@TheActionLab 4 года назад

That's what I thought at first too. But you can actually change the amplitude as well. I tested this on the frequency sweep by turning the amplitude up and down during it and it definitely changes the volume strength on the final laser audio. I think the reason is because the faster the you pass the laser over the mic, the louder the "pop" sound on the mic when the laser hits it. So, for a given frequency, the laser passes over the mic at a certain speed, so if you increase the amplitude at a given frequency then the laser passes over the mic faster resulting in louder "pops" at that frequency.

@YogirajGutte 4 года назад

@Tim O'ney frequency of the laser doesn't matter much. Only frequency of movement of the beam due to the mirror is generating the sound.

@remesh1226 4 года назад

@The Action Lab @Holt Westling What if an array of microphones are used along the vibrating path of the laser and the output from all of them are combined together and maybe do a noise filtering?? Also, what if instead of reflecting the laser towards the microphone, if we attach something like a hurdling bar on top of the vibrating speaker and put that system in such a way that the "hurdling bar" thingy vibrates perpendicular to the path of the laser (Like how the leaf of the fan passed through). Would that work in any way!?

@gurintto 4 года назад

@@remesh1226 adding more mics might work but that wouldn't be so useful if your goal was to order 1000 rubber ducks on your neighbour's Alexa

@jayr7226 4 года назад

Wife Comes Home... Wife: Hun What Are Doing With My IPhone? Husband: Uhhh.... I Can Explain... Through Laser

@ed.7945 3 года назад

This comment deserves more likes...

@BirinderSingh 4 года назад

Instead of moving the laser up and down, try to map the voice as peaks of current and then send a stable pulsating signal to the laser, which would pulse in the waveform of your voice. (Does that make sense? I really hope that makes sense)

@joeledwards6587 4 года назад

Yup, that's kinda what I was here to say. Don't quite know the technicalities of it, but I bet the problem with this setup is in fact the vibrations, because that moves the laser off the mic. Maybe a lense could focus the distortions into the mic? Maybe it would set the mic on fire. Lol

@boriswilsoncreations 4 года назад

I had that same idea, like, converting his voice to the light signals. Like on those microphones that you speak on and then there is a light in the speaker or in the sound interface that starts blinking based on the audio input. I think this comment deserves more likes since it is a very good idea to try, so he can possibly see what we are proposing.

@joeledwards6587 4 года назад

@@boriswilsoncreations yeah I'm pretty sure electroboom has a circuit or two for this

@markc2643 4 года назад

In other words, amplitude modulate the laser light. Maybe it could be done with an LCD panel.

@vess25 4 года назад

next episode : sound of darkness

@shivamchandok7826 4 года назад

What happens when the same experiment is done with *red light* or *white light* , will it make a difference in terms of frequency captured?🤔 You should try doing this with alexa and see how it reacts.😅

@amitnayak5869 4 года назад

B.I.N.O.D really excited..

@TrendingPotato 4 года назад

The action lab in 3020 *the sound of sound*

@devendravyas7986 4 года назад

S O U N D

@SauvikRoy 4 года назад

The best thing I love about this channel is along with the various concepts you explain, and then bring various creative setups to illustrate the same.

@gamejunk2707 4 года назад

Next video: recording sound with a lamp

@getsetflycuriosity38 4 года назад

You are my one of the most favourite youtube edit... Love you sir! I don't know why People don't like this type of content....

@halfbit6796 4 года назад

At least you can make a morse code with this

@mmomsboy 3 года назад

So that is the Big Bang sound coming from space when traced back to your garage

@daffaega4258 4 года назад

I have a question : Is it possible to collect micro-organism in one place until it's form a sand grain and visible to naked eye?

@markbrix9385 4 года назад

That's basically the concept of a "Petri dish"

@nopparuj 4 года назад

Lab culture dish?

@abhayprasad9580 4 года назад

@@markbrix9385 how we can grow bacteria on dish how it works

@sanjaybanerjee8101 4 года назад

look at curd. its the same just a clump of organisma

@girlsdrinkfeck 4 года назад

better question, can we collect enough sperm in a clump until its visible ? ( without the prostate liquid )

@aurilio5633 4 года назад

Quarantine Log: "I think I finally went insane, The lasers are now talking to me. I can hear them and its creepy."

@RudraRamanKalyan 4 года назад

So by this we can send sound with speed of light, Interesting .

@rohan6579 4 года назад

Wow i like to hear such kind of low creepy sounds.... 😂really enjoyed watching it!! who else agree with me?

@steegosaurus 3 года назад

Hey as a kid i was interested in the earliest recording ever then got extremely scared of that after researching about it. As soon as you mentioned that, I feel like my instincts just worked for me and paused the video and lowered the volume all the way down, right as it was about to play. Lol

@komalkuku 4 года назад

4:04 Its like a housefly flying arround my ears when m trying to sleep

@mr.4o513 4 года назад

Imagine having him as a science teacher that would be so cool

@Bruh-wc4mj 4 года назад

I never thought that Light has a Voice

@ToddChevrier 4 года назад

Good one! I tried this but in a different way a few years back...I used electronics and converted my voice into a laser beam and bounced it off a few mirrors. Works good in low light, but in a brightly lit room, then you will need some fiber optic medium to transfer the light.

@quahntasy 4 года назад

*Light sound good* We need 10 hour ASMR video of this sound

@themoviereview7532 4 года назад

He looks like Ant-man with his glasses

@carteroakley8812 4 года назад

I subbed to u

@Zenefor 4 года назад

The kids on Xbox: *"I can light an entire galaxy"*

@baker1714 4 года назад

3:10 thank you for the glasses, it was very bright

@remchi9506 4 года назад

this dude is legit showing me fascinating things i didnt even think of until rn

@brahmandsaraswat867 4 года назад

Sir, really really nice video, I had never expected that ever could be possible. Your engaging video, just got me out with a suggestion and some doubts. Suggestion: The reason for your sound to not transmit fully, would be due to the phenomenon of scattering of light by the air molecules in the path. Doubt: 1. Does this also happens when your receiver is in vacuum and no other (air) medium is around it than just vacuum. 2. As you suggested that sound creates when you disturb the moment or travel of light rays, then why their is sound when no one is disturbing the light, and it is traveling straight to the receiver. The doubt came from curiosity, and if you feel free, please reply.

@hye2288 3 года назад

*_"Sound of Light"_* Time : *3.25 a.m* Me : ok time to sleep My brain said- im tired but must do something for the answer! and google now me and brain not focus for answer when google. OH SHIT SO DAMN☻︎ Whyyy!??

@TheOwlman 4 года назад

I can certainly recall a bit of coverage of this recently as a potential attack on anything with a MEMS microphone (Hackaday springs to mind). The final test was to point a laser through a window and say "Alexa, unlock the front door" and it worked, as far as I remember. The price some pay for convenience.

@worldaviation4k 2 года назад

Just wandering how come the audio was clearer in a video 2 years ago when you did the alexa laser one? ^_^

@powerbounce3445 4 года назад

legends has it that he will reply to early birds

@arturpinheiro5518 4 года назад

i thought your profile picture was a hair in my computer screen

@eternalchimera3545 4 года назад

Its not the sound of light its the sound of the heat frequency

@btsbiot1340 4 года назад

My bad

@rishabhsinghrawat9731 4 года назад

Hello sir ,your videos are really filled with inspiring experiments which blows my mind every time and brings my interest back in physics

@tereruggiu 3 года назад

Well I should have expected how well those yellow tac glasses work. Nick Bolton, I will never doubt your words again

@dreweisman686 3 года назад

Doesn’t this only prove that light has mass though?

@darylonggg 4 года назад

Faster than notification bell

@christiansmakingmusic777 5 месяцев назад

Fun! I sort off flashed back to Wonka Vision when you had those sun glasses on.

@sebru 3 года назад

Your science isn't impressing many many people, but its honest work.

@gernith 4 года назад

Wasn’t there a “spy kit” marketed that would listen in on a room by bouncing a laser off of a window?

@mrchordstriker 4 года назад

Still is, but that's a little different.

@twister8233 4 года назад

When you see this video you will watch it

@gabrieldelatortilla1 4 года назад

WAIT WHAt you just described what I did are you a time traveler or smt? I'm telling the government right now, you are not normal.

@ZenInnovations 4 года назад

6:58 the reverse is also much more creepy. Imagine bouncing off laser from someone's window or mirror and then be able to hear the talks inside a house...

@brandonf1811 3 года назад

This exists. Someone could be listening to you at any time.

@Josh-lm7qq 4 года назад

The action lab- A guy who does experiments you never even thought about and love them at first sight

@YeetTheAn3On 4 года назад

Him: the sound is very creepy Also him: proceeds to show us the sound

@shivanandupadhyay3414 4 года назад

Sounded like some ones just drops there mic again and again

@thanlianachhakchhuak1499 4 года назад

*This guy needs some serious Intro for his channel*

@komalkuku 4 года назад

I agree

@Krish-su4oh 10 месяцев назад

this channel is highly recommended by me to others, very knowledgeable and educational.

@bilalsaloojee532 4 года назад

I can't wait for someone to invent tech to clarify this sound and create a new way to record sound, this will revolutionize sound recording research

@Tazy50 3 года назад

This is a huge technological breakthrough!

@levs5319 3 года назад

Nobody: The mosquito in my room at 3 am: 5:15

@sirsuccsalot1354 4 года назад

Woah, what this means is we could basically send sound at the speed of light then!

@yogeshkumarpandey2343 4 года назад

Its is due to Radiation Pressure. Radiation pressure is the mechanical pressure exerted upon any surface due to the exchange of momentum between the object and the electromagnetic field. This includes the momentum of light or electromagnetic radiation of any wavelength which is absorbed, reflected, or otherwise emitted by matter on any scale.

@verysmalldog8996 4 года назад

This must be the way aliens are trying to communicate to us.

@Chasval 3 года назад

My theory, is that It works because of the photo electric effect. Condenser mics have a DC biased metal membrane. When the light strikes the plate, it ejects electrons fluttering the voltage, i.e. its producing an AC signal in the mic.

@theshellmaker 4 года назад

I think its really cool how we can see the frequency of the laser when reflected off the mirror of the vibration speaker

@ragingelefants 4 года назад

Almost every TV and game console and sound bars already use this technology, they have a small optical port on it that does the same thing. But kudos for showing what/how it works.

@alifetomake 4 года назад

Really amazing! I love the KISS setup. My goodness, the sponge!

@harrpag 4 года назад

Have you considered the clarity of the mirror and the plexiglass and perhaps a more sensitive mic? I love this concept 💡!

@blazedgamingkr1438 4 года назад

you just showed how those recordings of ghost voices are created. Nice job.

@shrill_kill9929 4 года назад

Sound of Action lab is *Science*

@tupahutuokoneiswife3972 4 года назад

That last knowledge made me smarter every day!:)

@TwinShards 4 года назад

Try using a speaker as a Microphone, a cheap thin plastic membrane speaker that has a surface area of roughly an ear would probably do a perfect job for the experiment.

@ohh9979 4 года назад

It's probably due the pressure created by light beam on the diaphragm of mic. (given by Pressure=Incident radiation/speed of light) Also, if u want to transmit sound using visible light, try using photo cells. they'll create voltage according to your voice signals & it's reeeallly clear :)

@nairzD 4 года назад

Finally back to this topic. I've been wondering since the Alexa video.

@MammaOVlogs 4 года назад

way cool, so amazing and creepy hearing the first recording but it has to start somewhere,

@juanelandri930 4 года назад

Man, I'm so glad you made this video. I bought a cheap USB microphone for my PC and discovered that it picks up a low pitch humming noise from my LED desk lamp and from my wifi router. Does this mean that some of these electronics that we use in our day-to-day life are radiating frequencies that can in the long term have a bad effect on us?

@meh11235 4 года назад

Excellent demonstration

@lindltailor2299 4 года назад

Woahhhh... This idea when worked upon can easily become a very very good method to transmit sound using light thru space... This would decrease the data transmission time exponentially.... Thanks now I know what I need to work upon as a physicist in the future

@dhkdlhdyodyoclydtkd96494 3 года назад

3:51 sounds like one of my friends microphones

@ojkolsrud1 4 года назад

You could also connect the laser diode to an amplifier, and transmit sound like that. What's interesting (and very dangerous) is that since the microphone reacts to the energy transmitted by the laser (you discussed why this worked), it doesn't have to be visible light. You could get an IR laser to mess with someone's Alexa. The transmitted signal would probably be a lot better than what you were able to achieve.

@markcornwall1184 4 года назад

Gets unheated!! love u man : )

@duckguide4109 4 года назад

0:52 “Unheated” Nice scientific word. 😂 😂

@Hi-ii1sl 3 года назад

Light has sound *what a great experience!*

@rajanlamichhane3095 4 года назад

You transferred the sound at the speed of light WOW😍❤

@Growddy 4 года назад

That’s a Mous shell case! They are absolutely beautiful and I own one myself

@sowmya79 4 года назад

"Hear my voice......Alexander Graham Bell" That was SURREAL!

@sarabeth641 3 года назад

I saw this neat video once where a group recorded pictures of a piece of aluminum. The aluminum moved with the person talking, and they were able to turn those pictures into sound

@nitinnamdev5627 4 года назад

You can transmit the sound using laser by adjusting the gain of the laser according to the sound pulses - maybe it should work

@W0B0N 4 года назад

This is so big brain! Like seriosly! Voice going inside a fricking laser!! How cool is that!😱

@ahmedouerfelli4709 4 года назад

Here are some ideas: Put in front of the laser, a semi-transparent layer that increases transparency from one side to the other, and make it vibrate in a movement parallel to the axis of transparency change. Or put two polarisers in front of the laser, and make something to convert the linear movement of the vibrator to rotational movement of one of the polarisers.

@jayrludovice 3 года назад

Great contribution to Blackhole theory. Job well done!

@jerichoclaveria8875 4 года назад

5:6 you lookin fly dawg

@LuvyDhot 4 года назад

Stop thinking on this topic, otherwise you will discover the thing that is in my mind right. But,let me complete the bachelors and then masters first😃👏👏👏

@sidtronics 4 года назад

🤣

@twitchycorpse4378 4 года назад

I swear I always stumble across your videos when I'm drunk. Good stuff tho 😂

@whoreadsthenameanymore5027 3 года назад

When you order stuff on your teacher’s Alexa on Amazon through a zoom call using your laser pointer

@bmilano1580 4 года назад

Where do you always get all your crazy ideas from??? You are epically good!

@DamianReloaded 4 года назад

That's awesome. Now put the microphone inside the vacuum chamber. Also maybe you can focus the vibrating light back into a tiny area using a lens? So the mic would catch it all?