Unbelievable Noise Cancellation Experiment
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- Опубликовано: 6 окт 2024
- In this video I show you how noise cancellation works and give you a real life example that you can experiment with on your own!
Credit to myurgil for inspiring the ideas in this video many years earlier:
• Noise Cancelling Heaph...
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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.
Hi everyone! The experiment clip starts at 4:34
Thanks
This is amazing...
Hi
It reminds me of 13 reasons why lol
You could also turn mono on Windows 10
This must bee why I have trouble making decisions sometimes, my left hemisphere cancels out my right hemisphere and I end up taking a nap.
💀💀💀🤣🤣
Left frontal lobes cancels out your right frontal lobes*
🤣
@Adrian Kelter You got it! It wasp.
Awesome comment
I discovered this noise cancelling effect about 35 years ago when I accidentally connected half of my speakers with reversed polarity to my car stereo. The sound didn't disappear completely but was very "thin". Should have claimed a patent for this. ;)
Demn
Lonzo Apparently a man named Dr. Lawrence Jerome Fogel submitted patents about active noise cancellation in the 1950’s. Sorry man ;-;
This is the equivalent of i discovered something new but it's already been discovered
You mean pondered upon?
@@ayahuascagaming9399 except it probably wasn't 36years ago i guess
Fun Fact :
If you delete your audio file, you can't hear anything.
OMG so right
Hey! My dog is barking.
How-عمرو
Why didn't you still get a nobel
Every time he says “audio file” I hear “audiophile.”
You must love FLAC files! ✅💟👍🎶
padkirsch wav is still better haha
@@kenshiromilesvt.7037 interesting perspective. Care to expand on that? I'd like to know your perspective on that. Why do you think it's better? In what way? Audio quality, file size, accessibility. I would really like to know?
padkirsch dont get me wrong FLAC is good. Its just not as wide spread as wav and wav work on more platforms. The quality is actually better because it doesn’t compress anything whereas FLAC does compress somethings, but it takes a really good ear to tell the difference (I can tell the difference, I’m lucky to be blessed with those ears haha, as I am sure you are too. Its file size is bigger, but if you need small files, convert to highest bitrate AAC with Audacity, the difference is almost unnoticeable actually, and the file size is pretty small too.
@@kenshiromilesvt.7037 i aways convert into AAC i don't know why
so can I copyright claim other people's silences in their videos for using my digital audio cancelation sample?
… 200 IQ! 🤣
Real question tho
Sadly, thats not how the copyrighted music recognition works
Hyzt aww c’mon no need to be a buzzkill lmao it’s only a joke 🤣
@@Hyzt- Might just be. It would explain a lot!
Wish I could do this to my neighbors music!
Same here!!!
actually you can lol, active noise cancelling headphones, they have a microphone, it just inverts waves of everything reaching it and sending it to yout ears immediately, so you hear nothing
You CAN! You just need a fast enough circuit to record/flip phase and play it back at them!!!
Shotgun will do the job.
If you cant stop, you can join
'If you cant Hear me right now, dont adjust your volume'
Every single person: spams volume up button
My ears hate me now
I did that then i read it
I was close to hitting that up button
I just turend up my volume to see if there wasn't some kind of static left over.
I have nothing to reply so check out this doggo vibin ruclips.net/video/dQw4w9WgXcQ/видео.html
0:00 Lol I swear I thought I heard you saying that in a very tiny voice in my head, but i realized i just read it in ur voice after I put the speaker close to my ears.
Same I could swear that I heard his voice little bit
Same
its your brain making up for it becuase it can read the subtitles and basically say them in your head
@@Zanthron The weird part is I didn't have subtitles on at all lol. I guess it's just because I'm used to hearing him so much when he opens his mouth 😂
5:00 - That external hard-drive, perched perilously at the edge of table, is stressing me out!
I'm pretty sure that's a modem, not a hard drive. (You're referring to the thing with blue lights on the left side of the table, right?)
@@coolguy284_2 Yeah, perhaps it's a modem. Either way! :)
@@nikhedoniac It's just less of an emotionally scarring event if the modem drops than if a hard disk drive drops.
Cool lol i was about to turn the volume 😂
me too
@@tthung8668 LMAO i did the opposite of what you did i turned my volume down😂
See you in 5 years when this will be recommended yet again
Unoriginal
This joke hasn’t been made on every single popular video ever. Nope. Definitely not
God forbid you might be interested in actually learning some things about reality as opposed to just watching piano kitty for the millionth time or whatever else sort of nonsensical things you do on here.
It's recommend in 5 hours
See you then!
This works pretty well in a open area with two ultrasonic speakers as well. You might love experimenting with US speakers. They are hyper directional and give the listener the feeling like someone is talking in their head. You can also turn air into haptic shapes, levitate things, etc
Deaf : Drake disapproves
Noise Cancelling™ : Drake approves
The Stasi not hearing us just draws attention!
normies don’t get this
Nyan cat TM
You again
I had also done this experiment while learning about waves in class 11. It was really interesting.
But your idea of doing this with an audio file was just amazing.
even i did it in 11th while learning waves
I just recently had to deal with something similar, I needed two left and right tracks to be different for something so i just copy and pasted the mono track and inverted it. Sounded fine to me, but when i tried showing it to someone over a speaker it wasn't there anymore.
It's a criminal offence to not let government hear you. Penalty is exceptional.
What was the solution
@@coolmonkey619 i uninverted it and aded a delay of about 0.0003 seconds.
@@mrkitty777 is this a reference to something that I don't get?
What was the point of inverting it...?
I discovered, accidentally when I was having a problem with a headphone jack, if I positioned it the right way I could hear the music in both channels with some parts of the mix phased out. Depending on how a song was mixed, and where instrumentation and vocals were placed in the stereo image, i ended up with stripped-down versions, or karaoke quality songs. I could hear edit points, and riffs that normally would be buried in the mix. I started trying it in Audacity, and ended up with a really interesting play list!
Same
DCTGoddess
Goodie!
yeah sometimes with crappy earbuds i hear the inst and vocals only
I am a music producer and knowing about noise cancellation beforehand made me feel smart
Anizan lol. Beforehead. So smart
j p hahahahaha
@@jamesbizs woopsie. I'm not native so accidentally made a mistake
Calling it noise-cancelation is wrong in this regards - there was no "noise" to begin with, only the original sound, and then he set that to 0.
Watching a video like this weeks ago made me feel smart
I compose music on a DAW. It's kind of fun to go back and invert previous versions of tracks to hear the difference in what I've added/removed put together. I do this from time to time :)
Dude that's really smart. Never thought of using it that way 😃
I've done this to demonstrate to people what mp3s do to a song.,
People with mono audio: is this a prank?
There’s something I always wondered if it would work: when the stepper motors of a 3D printer move, they create a characteristic sound depending on the speed I think. Thats why there are videos on RUclips where whole songs just with stepper motors are created. I always wondered if it is possible to cancel most of the sound of the stepper with inverted sounds playing. Theoretically you can create the inverted sound file before even starting the print, because you know every movement of the printer from its print file (gcode). Also the loudest noise of the stepper Motors aren’t like random sounds but real notes with more or less constant waves I think
You must have heard of headphones with noise cancelation technology. They use this principle.
But
I think it can't work very well in a room, where sound is diffused around. There would be points where the noise is canceled, but the waves go through each other, and as they bounce the walls and other irregular surfaces of the room (the people in it, included) the scattering would create zones with CONSTRUCTIVE interference, rather then Destructive interference, cause the opposite result of the one desired.
@@fernandogajo8800 Makes sense. Thank you!
@@fernandogajo8800 Would work pretty well by just attaching the speakers directly to the motors they are canceling, as he was saying, having both sound sources as close to on top of one another as possible makes for pretty effective cancelation
@@Nevir202 interesting idea
I love that you come up with simple and yet so interesting concepts and experiments for a video. This makes you learn about the topic at hand much easier, because you can visually, or in this case audibly hear the difference and do some experimenting on your own. Fantastic job as always :)
Is it just me or does the inverted sound clip sound “feel” different to anyone else In your ears?
It’s just you i think
It feels normal to me
Yes
a p sound sends out a compressive wave
But if you invert that sound you get a decompressive wave
sound of pushing out vs pulling away
It feels different for me too.
What I find shocking is how you can work on a table that small 6:56
Tip: if you want to mute audio in a track in a video editor, just delete parts of the audio track that you want to be muted instead of adding a negative sound track
hahahhaha anyway its just physics
I really appreciate your enthusiasm and clarity in explaining often complex science in an engaging and thought provoking manner. Thank you.
.. .. ... . .... . ... .. ..... . ...!
Oh sorry, I had noise cancelling on. I was saying "Awesome video Action Lab!"
Him : *Don't adjust your volume*
Me : *Why do I listen to him?*
That was cool. I listened to it with small stereo speakers, and it was exactly as you said. And putting them right against each other almost muted the sound. As I once said, you are the one and only "science troller extraordinaire".
For some reason I actually heard you in my head during the start of the video. This was probably because whenever your video starts you always say the phrase "Hey everyone". Also reading the captions probably reassured my brain that you were actually saying that. But after the phrase I noticed that something wasn't right.
I used to play around with my headphones doing these noise-cancelling experiments in my school after learning about the double-slit experiment one day. Good times...
And this is why it is so important to have every microphone IN PHASE when you record drums or a band.
Legit, I first learned this in talking Tom and friends on Netflix, I thought it was fake, but now, I know it’s not. And that’s cool
These are the science questions I always want answers to. Thanks for so much information!!!!
This reminds me I once had a defective MP3 player that had inverted polarity on the right audio channel. The bass and other centered sounds on stereo music were weak; it was horrible to listen to. The seller denied the issue existed and refused refund or repair. 😠
Oh, and the seller and some even tried to tout the "unique, wide soundstage" presentation when it was just the out-of-phase speakers effect you're hearing. 🙄
you make everything seem so easy. I wish I had seen your videos when I was younger and had access to my school lab.
Great Man Following you since 5k subs 😍
If your next video has a thumbnail with two speakers and a mellon sitting between them - IM NOT WATCHING THAT VIDEO!
It seems that RUclips auto generated subtitles is affected by this as well. There is no subtitles in the beginning.
I was searching for a video with an actual demonstration of this effect, thank you!
4:34 On my 5.1 surround sound system this part actually comes out of the rear speakers only, it's very rare for sound to come only from the rear. I just put my receiver in stereo mode and it just sounds really weird, it's hard to explain, almost like an echo but not an echo.
Yes same. Like its coming out from inside of your skull
I've been trying to figure out how to do this forever! Thank you!
Also, on headphones, since one channel is inverted it sound like the sound is coming straight from my skull
"watch what happens when we overlay these audio files"
Me: *gasps* oh that actually makes a lot of sense
Love it! This phenomenon also happens if your swap + and - on just one loudspeaker, it's called out of phase.
Another cool audio phenomenon is to attach both + speaker outputs to one loudspeaker. It removes the center image, i.e. the vocals.
If you do this on the speaker output remember to keep the volume low. A better solution is to do this mod on a external cable attached to your line/CD in.
omg... listening to this on a 2.1 speaker system is the weirdest most uncomfortable thing >_>
Should have done it on the April fools day!! 😂
99% people would have been fooled by that!!! 🙃😉
MPC Astro dudes no they wouldn’t . They would think he didn’t put any sound
Would have been a stupid prank, nor would it be being fooled.
I'm loving these last few videos!
In techniques like hemispheric sync or binaural beats, the two different waves ( waves with slightly different frequencies ) used in left and right channels/ears get resolved by the brain hemispheres itself and do not necessarily need to physically crash with each other to produce the superimposed beat effect. But in this case, its kind of strange to know that the two hemispheres of the brain do not resolve the opposite phase waves by itself. You always have to make the waves of opposite phase physically meet to cancel them out.
That's probably because the brain can interpret the frequency but not the phase.
I used to use this method to make acapellas from full tracks, if I could source the original backing only (instrumental) you could invert that, and overlay on the full track, and be left with vocals only! :D
It's an age-old method xD
There are 2 kind of people: who raised up the volume at the beginning, and who lies
I lie
who lies
@@sugaryskies14 i lie
And the ones that waited just to be sure👑
S A i lie
This is literally "sound of the silence". Lol
This channel is wonderfully interesting!!
So... If two people say the exact same thing at the same time, you might hear nothing?
If that one person speak in invert and their sound wave hit each other. Yes you might hear nothing
Speaking generates complex waveforms with immense variations in wavelengths/frequency. Complete cancellation is possible and quite easy with perfect sine waves, but the most you could get with two different people speaking is a slight reduction of volume among a handfull of frequencies, and it would be negligible at that.
Me at 2 am right now:
*I don't need sleep, I need answers*
I wonder if this can be used to silence the sound of vehicles near an hospital or school or even near a residential area...
Pa -1 No
This happened to me by accident. I was using AUDACITY last year and thought there was a glitch when I was trying to separate "noise" for a tutorial video.
After 4:34 wearing earphones at 1x speed I can hear you clearly, though at 2x it sounds strange. *Why is it so?*
I am guessing because of RUclips's speeding algorithms.
It sounda weird in a lot of songs too
Nice concept! It would also be good to do the same type of video for binaural beats. I've enchanted my daughter by setting a slow sweep (~ 2Hz variation) on one channel while using a steady tone on the other channel (center frequency 300Hz). She was most intrigued by the Lissajou figure on the scope. The cat left the room.
With the demonstration using the video instead of sound, what would happen if I took both videos, inverted one and the untouched one, put them side by side and crossed my eyes to focus on the two together? Like the 3d illusion you can find online? Would I just see nothing??
Lewis Bourne nope, because light behaves different than sound
nah you'd still see what your dominant eye sees, mostly.
that's actually the only way you're able to see some colors. like yellow-tinted blue, or green-tinted red (no, it's not green and orange. they look different and a bit weird)
The rationale is so simple yet fascinating
I tried this on my wife, didn't work, amplified the sound. But the dog pen isn't too bad.
Superb !! This works in both stereo & in mono. Wow
This guy finds bugs in universe's code
Very cool! So smart to use the right and left channels!
I know some photographers like to paint their editing rooms grey. Maybe there's something to that?
Wat
I like that you do experiments on many of the little things that I think about and find cool.
You can do this by switch cables of one speaker in a stereo setup with mono audio
Now we just need to find a way to apply this noise cancellation in a way that allows us to play hentai on speakers in max volume without the sound escaping out of the room.
😂😂😂 stop it... LOL
Myurgil did a same video 12yrs ago! It blew my mind the first time
That's how active noise cancelling works, right?
Kinda - active noise cancellation works by picking up the noise (with microphones) and repeating it with the inverted signal - and doing so with as close to a matching phase as possible, taking into consideration the distance from the microphones to the speakers as well as the time it takes processing, as well as the acoustic characteristics of the headphones.
But this here... he just set the sound to 0 before exporting (that is what he actually did with adding the track onto it self - the exported video has no sound-information what so ever at those parts so there is no cancelation)
This is great! Thumbs up for the home-experiment.
It literally removed the sound on my phone.
Ur sound is like text to speech narration🔥🔥
Hello Organisms,
We have looked into this issue and are working on to fix the bug. The issue will be fixed in the next EARTH 2.0.152 update. By that time keep LIVING on.
Your very own,
GOD (Head Developer)
Derp City has a special speaker wall unit that releases a special type of soundwave that drags out (meaning it sounds like it is getting slower and echoes) until you can't hear it anymore, and it has to do with DISTANCE.
This must be how jawbone designed their jambox to produce live audio (binaural audio) on their Bluetooth speakers years ago. On their first model it was an upgrade and whenever you turned the feature on it caused the volume to diminish. On their next model (mini jambox) they built it into the software and it stays loud whenever you use it (which is really the only way to use it).
Also, the mini jambox can pair to another jambox. When you turn on the live audio in this mode you and center yourself in front of the speakers you can't tell where the speakers are located because there's a true left center and right. So if I start playing music with your eyes closed and the speakers right next to each other if I separate them to the sides you will never notice it because the speakers create a live audio experience that completely surrounds your head when centered properly. Works great when watching movies. You hear the left and right sounds as you're supposed to. I love performing this on people because then you turn it off and you can clearly hear where each speaker is located with your eyes closed.
Never stop doing stuff like this! Always amazed by the things you teach us!
Also if you're using headphones, if you put the experiment video, you can feel a little pressure pushing in your head
That would be cool to use in a song. Imagine a metal song where the guitars that are each panned to one side are actually the same sample but one is inverted. That would actually be creepy.
This works, but please make a long version of that portion.
So I think if I turn the volume up loud, my head will implode! :-)
This is what you do when you need to seperate vocals from music. If you find an instrumental version of the song with exact wavelengh as the original song, match it, invert instrumental and you have acapella.
Look at you, getting me to work and do things in quarantine.
Great experiment! 👌🏻
I’m here because my mom’s medically certified half deaf (right ear) and practices selective listening without her hearing aid and I’m convinced now her brains have rewired itself to be able to do what she does without any need of hearing devices!
You also have to turn off Dolby Atmos or other equalizer for it to work
This is fun. Some years ago we organized an open air cinema with a huge stereo audio system. Sometimes we had to flip the phase from one side because otherwise the guests sitting just in the middle couldn’t hear the sound properly...
As another experiment you could take stereo computer speaker and record the audio (with one inverted side) again with a shotgun mic moving slowly around between these speakers...
Lol
I was adjusting my volume thinking it went to 0 again
my dad explained this to me today, he actually found out about it playing with music software when he used to make music back in the day, very interesting experiment:)
I love playing with audio. I've done experiments like this with Audacity. You can get some really neat effects.
80 dislikes do not have ears 😂
I was turning up the volume just one second into the video. You got me lol
This is actually really nice
This looks like the type of video that will get recommended by RUclips years later
You should do a video on speech jamming it’s super cool
At the start I set the volume to full and then you know what blasted through my headphones......
wow that is amazing! l loved it! Way to go son!
It can be done physically for stereo headphones by partial pull of minijack from socket. In some position it will make circuit through both dynamics simultaneously and it will be real mono sound. So yes, it works
Reminds me of when I decided to take a large collection of home stereo sets and try to hook them all together to create a wall of sound. I had 12 speakers, and 3 reciever/amplifiers, with 4 speakers attatched to each reciever. When I turned up the first reciever it sounded good, and as I turned up the second reciever, it seemed like it just made the first one quieter, instead of being louder. I eventually reversed the speaker polarity on the second one and everything played louder, but sound quality wasn't so good on second one with reversed polarity.. Eventually I plan to try reversing input polarity instead of speaker polarity.
That's how the old Hafler style of quadraphonic sound used to work. In a stereo recording some sounds arrive at the left and right microphones out of phase. If you subtract the left and right channels from each other and play them through speakers behind you, the out of phase sounds will appear to be behind you. It worked splendidly for live audience recordings because audience noise tended to be out of phase. Happy days with a few op amps and a soldering iron!