Noise Cancellation Explained

Sounds made in collaboration with Jouke Feenstra! :) @zwart_glas
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- Aldo

[@GamingMateo]

This makes so much more sense now with the visuals

[@OrdinaryDoommarine]

for real

[@KnowArt]

that's great to hear :)

[@rankamoeba4979]

​@@KnowArt I see what you did there ;)

[@ichbinrandom5925]

@@KnowArtSorry, can’t hear you! Got my Noice canceling on. Your air molecules don’t reach my Eardrums!

[@Manny73211]

​@@KnowArtdoes this video have something to do with my comment on the microphone video a while back?

[@zebfross]

This is why they're best at cancelling consistent sound like airplane noise vs sharp sudden sound like a sneeze

[@StavDev]

Unfortunately. Oftentimes the most annoying sound can be the noises people make, and that's usually something ANC has a hard time with.

[@dinasyzhirckow8040]

Actually its not explains why

[@Blackw1ng]

This is where passive noise isolation comes in clutch. Passive nc tied with active nc can be super trippy with how effective they are together

[@wile123456]

Well if you're in a crowd, like a cafe, it cancels it quite well, cause all the voices muddle together and becomes more of a drone similar to an airplane, but with peaks in the midrange. Noise cancellation has a harder time with treble noise, but that's mostly due to the earbuds not having the dynamic range neccesary at the high range to properly cover it, or the mic no being able to catch all the detail

[@wile123456]

That's why earbuds that aren't in-ear are objectively worse

[@sickomode6440]

"The opposite sound of 🎵🎶🎷 still sounds like 🎵🎶🎷" got me lmao 💀

[@kouzerumatsu8152]

The opposite sound of "lick reference" still sounds like "lick reference"

[@nugget6635]

It's opposite in Amplitude. It's not playing backwards. Opposite Amplitude means... That crests become troughs and troughs become crests... The sound will still sound the same because what matters to our ears is the difference in pressure... Our ears kinda do not care about if the eardrum is moving outside or inside, as long as it's moving.

[@rkidy]

⁠@@nugget6635opposite amplitude generally just means the wave has been phase shifted 180 degrees, so it’s the exact same sound just half a wavelength behind. Considering the wavelength of music is generally gonna be measured in mm, the delay is pretty much negligible. So to human ears, the “opposite” of a sound is pretty much the exact same sound.

[@zappyapp]

​​@@nugget6635 Inverse polarity, amplitude can't be reversed

[@youregonnahaveaskeletontim1925]

​@@kouzerumatsu8152 why did i try to read ''lick reference'' backwards 😭😭

[@timschulz9563]

The Lick

[@KnowArt]

you got it

[@WeThepeople-gr7on]

Yes

[@DavM310]

Instantly came searching for this

[@lwazithesyne4675]

The rickroll of musicians

[@thebariguy75]

​@@KnowArt can I just say that your channel is by far the best at explaining literally every concept of physics/ engineering. It helped me understand so much cool scientific stuff can you make a video about how torque works if you haven't already

[@Endertub3]

the lick goes hard

[@ryderalley4853]

D-E-F-G-E-C-D 🗣🗣🗣🗣🗣🔥🔥🔥🔥🔥

[@wolfwarrior8392]

​@@AMADAexeuse Shazam. It's an app

[@KINGoftheHunters]

💀

[@AdrianMaenzanise]

🔥

[@Kian-hm2ku]

Whats that one chart that plays it over and over again? It's some big band chart.

[@spirto1279]

Bro just activated a sleeper agent in every jazz musician's head with the lick

[@vrthief]

What’s the song tho?!?!

[@literalantifaterrorist4673]

@@vrthiefthat’s the joke, it’s a part of many jazz songs

[@patemathic]

​@@vrthiefit's just a phrase played a lot in jazz

[@famlrnamemssng]

The loops are always impeccable

[@GREENSABER2010]

ikr

[@KnowArt]

thanks :) great to hear

[@russianbear0027]

Its wild how fast the processing has to be for it to cancel out before it reaches your eae

[@user-bl4oq7fd8d]

Because the speed of light is almost a million times faster than the speed of sound.

[@humble2246]

It really isnt that crazy.

[@russianbear0027]

@@user-bl4oq7fd8d current may flow close to the speed of light but that doesn't mean there isn't lag in whatever electronics do the signal processing. Especially since the sound takes less than a thousandth of a second to get to the ear assuming the mic is an inch or so out. Plus the driver in the speaker also takes time to move to generate the interference signal. It's amazing stuff.

[@anna-flora999]

I'm not sure how much processing it even has to do. I wouldn't be surprised if it's mostly electrical component ​@@russianbear0027

[@demp11]

​@@russianbear0027 yes they predict the sound because of that. That's why you can still hear sharp short noises like sneezing or similar.

[@Weezykillah]

Loved that you just put "the lick" as an example

[@plastican]

i love how KnowArt knows arts in his video

[@KnowArt]

hehe

[@readyrex]

That was a crisp transition.

[@OctagonalSquare]

Using the lick? Nice!

[@kibro427]

i know you didn’t just hit us with the lick

[@winkystinky]

You got those dt 770s to prove your point lol

[@byfrax2371]

The phenomenon is called destructive interference.

[@canelpolat2318]

In music it’s called phase cancellation

[@tobehonestidontknow9368]

In my room it's called "god dammit can you knock louder? I have headphones on"

[@iclonethefirst]

Everyone is just speaking about "two wave lengths cancel each other out", but your video is the best actual demontrastion on how it exactly works yet

[@KnowArt]

thanks! I try to create understanding and not just acceptance of a fact. You noticed exactly that difference. That's great to hear :)

[@Banjies124]

IT'S THE LICK

[@twist.mp3]

The licc 👀

[@nate_storm]

the lick

[@Ferny8erny]

As a saxophone player, that is an interesting saxophone design

[@KnowArt]

hahaha, of course it's very imprecise, but the valves are on the wrong side on purpose, just for good visuals. Oh, the heinous crimes I have to commit for these videos... you wouldn't believe!

[@sunburntsilverado7665]

Haha very big belled

[@swedishbloke]

”the opposite sound of” GOD DMANIT I THOUGHT I HAD ESCAPED THE LICK

[@ISuperI]

Da _lick_

[@--TOM--]

Licc

[@BadlyDrawnJack]

So noise cancellation is basically constantly blasting you with sound which makes existing sound quieter. *Sound + Sound = Silence*

[@user-qt9ek3us6i]

You blast the opposite/inverted version so that when you hear it in your ears both versions cancel out

[@jdcandres]

​@user-qt9ek3us6i yup, so the right equation will be SOUND - SOUND = SILENCE.

[@imoutodaisuki]

Sound of Silence

[@nguyenvu8262]

@@jdcandres actually it is SOUND + -1 * SOUND = SILENCE. There was no subtraction. It was conversion and addition.

[@jdcandres]

@@nguyenvu8262 dude, that's literally the same.

[@BlueFlamingo_01]

Finnaly Headphones lore

[@Karan-ew7ol]

Bro your animation team is such a gem your channel delivers high quality content i really really love it keep uploading more often but not that much to create a sort of demand

[@KnowArt]

big thanks from the animation team (just me)

[@Karan-ew7ol]

@@KnowArt that is so awesome that you are able to do so much just by yourself only great work man

[@randomgamer3483]

Putting the lick for the sax music is crazy

[@KnowArt]

hehe

[@pineapplegamer6986]

I loved that voice fade out into the jazz riff representing the noise cancellation

[@mymo_in_Bb]

fun fact, in jazz we usually call them licks

[@kidznowadayz]

As a modern human who doesn't listen or respond to others this noice cancellation is worthless to me

[@jackdaniels5071]

No matter how much you spend on noise cancelation, the lick will be burned into your mind forever

[@professordey]

Yeah, but what everyone forgets is that cancelling the waveform _doesn't_ reduce the pressure on your ears it just makes it constantly as high as the noise being drowned out, which gives me massive headaches and makes you feel like you're underwater or something. It's deeply unpleasant.

[@kurukuru4120]

My first time using anc was the same experience.

[@marianormiranda8537]

This is why I hate noise cancelling as well

[@KSeigY]

So... The silence is deafening? (I'll see myself out)

[@JM-st1le]

I honestly wanna cry man. Imagine every learning experience for every child is like this. How much more can humanity achieve with better education. I think there's huge gains to be made. Great work

[@KnowArt]

thanks! I hope we can make it happen

[@Wrutschgeluck]

It's a very cool technology. But it seems that all companys have choose to not tell how good their technology is compare to others. Very strange.

[@statelyelms]

Something about seeing a wave being shown as what it *really is* for once is CATHARTIC.

[@pranavbhushan5391]

KZbin comment glitch. Showing only recent comments 😅

[@GibThom]

Fr it’s wack

[@andym.s.5231]

I’m a chemist, and have a minor in physics, but I don’t think I’ve ever had that explained so well. I absolutely love everything in this video. From the ratio of nitrogen molecules to oxygen molecules, their correct colour, the audio, the beautiful explanation, the looping, I love this.

[@thairinkhudr4259]

I never would have noticed if you hadn't mentioned it!

[@KnowArt]

this is really really great to hear. I'm glad it doesn't go unnoticed. (although do still be careful, I do make mistakes on the regular)

[@andym.s.5231]

@@KnowArt Don't worry, some of my syntheses go flawlessly and others crash and burn for reasons I still cannot figure out, you're not alone

[@kexcz8276]

Well, I knew it has to be the opposite wave, but what I really didnt realise ia that the inverted wave still sounds the same lol 😅

[@KnowArt]

Feels strange and completely obvious at the same time, right!?

[@kexcz8276]

@@KnowArt yes, exactly! 😂

[@JustAnotherKuro]

I understood nothing, but I understood everything 🤯

[@Prakiru25]

Beautiful

[@Krewer69]

I heard "The Lick"

[@truth8526]

Ngl, I was vibing to the music. Full ver when?

[@k1ngjulien_]

google "the jazz lick"

[@truth8526]

@@k1ngjulien_ thanks. Didn't know it actually existed.

[@TBBLOXANIMATES]

unlike me not understanding other videos explaining voice canceling and etc this video rlly made sense for me to understand

[@Certainly-somebody]

As a saxophonist, I love that you used the sax as an example 😅

[@superiorforces8047]

I love how this makes so much sense compared to reading out of a book lol

[@smorrow]

Or watching Adam Neely

[@camdenritter7652]

This seems like an incomplete explanation

[@orangeporridge1553]

How

[@bigdoggo5827]

Sound goes through air, you copy that sound, reverse it and push it out using the air

[@aqua-bery]

It literally isn't

[@geebeedee9509]

It's definitely not a sound engineer explanation, but it's a nice and simple KZbin shorts explanation for non-sound engineer folk like me. I'll try and see if I understood it correctly: Sound is a wave, from energy moving molecules around. It moves the molecules back and forth a certain way. In this case, sound travels through air, and is received by our ears. In headphones, the sound is made by moving the speaker in a certain way. By copying surrounding sound, inverting the sound, and playing it in the speaker, then it cancels out that surrounding sound since you can't move the air both back and forth at the same time. Trying to move forward while also moving backward at the same speed will result in you not moving. If two people who match each other's strength play tug of war, the rope won't budge. Thus, that once-moving air turns into non-moving (or just slower/different moving, since noise cancellation technology isn't perfect) air that doesn't reach the ear. I hope that was correct.

[@AJ__525]

all it’s doing is absorbing and dispersing energy (sound waves) out of the headphones

[@RomeoDemianWalker]

So, noise cancellation, is actually the creation of superposition, in sound waves. Nice.

[@parkervarin]

You could've done any lick, but every detail in your videos is perfect, so you did it, the lick.

[@Esalayoshitha]

Bruh y these comments have less likes and less pins 😮 edit:Now all are fine..,tysm for likes i never got so many

[@nowincry6056]

Tips: you can scream and nobody can hear you 🙉 If you have noise canceling headphones 🎧

[@SolidRockpic]

Yes I just put them on and start insulting everyone and they can't hear me because I have noise cancelling 😂 I do get weird faces tho, probably because they only see my mouth moving.

[@Exilon0193]

That explains how how noise canceling is quieter when it's on than when it's turned off. Finally got the answer.

[@decract]

I feel like i gained braincells even thought i lost some

[@Execu]

using the lick as an example❤

[@jairobernabe3046]

ya like jazz?

[@KnowArt]

no, that's not good... HERE SHE COMES!

[@ironspider9280]

Am i the only one that gets the vibes of "Rug Rats" and "Hey Arnold" from some of his videos? I can't explain it but something about the music/ sounds and animation just gives 90s vibes and I'm loving it.

[@carsrulezk]

I actually never knew what people were referring to when they were saying it used inverted noise to cancel sounds, now it makes so much sense!

[@thomasbell7033]

Uh, I'll just have to take your word for it. I'm a little slow.

[@AliAbdulRahmanZafarDVM]

Xm4 user here.

Same

[@renderthegreatskycity]

The visuals make it perfect!

[@zunir0a]

Nice reference to the Beyerdynamic DT 770 Pro’s

[@J-UHHMMM]

I don't understand it but the music cool i guess😅

[@canyoupoop]

We hear the device sounds but outside noise(fire) gets mixed with inverted noise(water) which the headphone generate so they cancel and we hear only music from device

[@dooplon5083]

sound is pressure waves more pressure = more bunched up molecules inverted noise still has the same pressure wave pattern just flipped, so it sounds the same but the molecules bunch up in a pattern opposite to the first pattern, having bunches where the first had spread out molecules. play both sounds at once and the pressure from both groups of high pressure molecules pull on each other, evening them out so that the pressure goes away. sound is pressure waves, no pressure = no sound

[@arkaadias2526]

But it also has a downside. It has a delay. So in certain situations these "noise cancelling" devices can actually amplify an outside sound which can be harmful to you and you might not even notice how terrible your hearing is after just a few months of using them.

[@lukapetrovic412]

Please never stop making these, I love you man

[@josephisvr2947]

Man could explain how pennies are made and I'd be excited to listen

[@________________5392]

I think something wrong with youtube shorts comments. I can only see recent commenta and not anything els even when i try to change it

[@yosangle]

Yes

[@viviananthony9972]

Me too bruh glitch in matrix😅

[@Millticker]

Same, is it server side?

[@johnnylch18]

Lol why is that strange though?

[@Sekaitunes]

It's more so interesting than strange, although i get why someone would word it that way. Phase cancellation is a very interesting property of audio where a wave and its inverted phase counterpart cancel each other out. Digitally and on paper, it makes complete sense, but seeing it performed in real life to eliminate unwanted outside noise is super cool and can seem strange hahah It can seem especially strange because in an analogue sense, both the sound and the inverted counterpart sound the exact same, but when played together or against eachother it sounds silent. Theoretically if you have two speakers lined up in the proper conditions, and play one audio source from each, you would not be able to hear anything, and that does sound strange for someone who may not know whats going on

[@miguelotieno3573]

It's really stunning how technology has evolved.

[@Pheonix_GamingYT]

Thank you so much for this! I’ve been curious about how it works for ages now, I love what you did the with the audio design fading it in and out and stuff, the quality of these shorts are absolutely fantastic 👍you deserve way more popularity then this ❤️

[@lih3391]

Licky lick, but also how do the headphones predict note changes for example? I guess it just samples so fast that the blip is unnoticable?

[@dooplon5083]

that or I'd inagine that the fastest nite changes get through anyway

[@KnowArt]

I'm not sure about the exact timing of it all, and therefore how much predicting these systems have to do. Maybe someone that does can chime in here?

[@FilinMXr]

Since the noise cancelling is not perfect and still lets through a lot of sound, you probably won't notice a missed transient (if there is any)

[@zeackplayz6377]

What

[@virtualVard]

The quality of the content is marvelous

[@raidio3733]

Basically Reverse card

[@bellic6288]

u wat m8

[@wintutorials2282]

ayy lmao👽

[@MangoTwT]

You really can't stop making these. Ever.

[@bachlamtung5131]

this one was such a banger with all the animation and sound design, i knew how it worked but couldnt help but be impressed with your way of communicating this info!

[@ObservationofLimits]

I can't stand a 2ms a/v desync, no way you're reacting and publishing this inversion fast enough unless it's a repeating droning noise

[@KnowArt]

Yeah you need to predict the next wave and stuff. This is just to show the concept

[@monoblock.]

I knew how ANC works. Still this video taught me something. Also, it’s an amazing artwork.

[@reversedgaming2361]

I'm sick rn and as I listened too the sound in the beginning my ears suddenly clears themselves

[@HURTLESSHU]

so basically it flips the phase so it cancel each other out, cuz that's pretty freaking awesome!!

[@evyats9127]

I have never learned so much in half a minute

[@ReasonableRadio]

You thought you were wearing the headphones but it was the saxophone wearing them the whole time

[@Pain_is_temperory.]

So its actually playing a silent music for you to not hear the actual music. Phenomenal.

[@KnowArt]

nice way to look at it

[@RangerOfTheOrder]

I love that you used DT770s for the headphones. I love mine, although I wish they had noise canceling

[@steampunx-the-content-creator]

I really like when the musical effects are played by the saxophone instead

[@musicbyshadofox]

Every jazz musician is fuming right now from the use of the lick. I'm just impressed that you successfully phrased phase shifting in a way that my gf can understand

[@casper75559]

It’s such a magic feeling to be on a busy street, bus full to the brim and turning on noise cancellation😩 you could almost forget where you’re at.

[@thaliasaytransrights8118]

I fucking love all the mouth foley you do

[@fnix5843]

Ohh so that's how this works. I tried to read about it but I couldn't understand. Thank you !

[@corbacmasque6303]

i finally understood how it's work

[@Marsmoly]

I learn so many things from this channel

[@Alex-ug9wx]

I find noise cancelling, particularly on AirPod Pros, to be incredible. I was on a plane not too long ago, and whilst the noise of the engine was practically silent, it automatically detected the voices of those I was conversing with. They were effectively filtering out the noise it somehow knew I didn’t want to hear, whilst amplifying voices of people speaking to me. That’s pretty cool if you ask me.

[@Kwazii_cat144]

"🎵🎶🎷" Such inspiring words

[@Dude8718]

nothing brings me greater joy than hearing the lick in peculiar places... I thought "oh cool I know how noise cancelling works but I'm gonna watch this short anyway cuz I love this channel" and then DODODODODOODODOO. I had to share it with my friends 😂. Thank you for bringing me great joy

[@arianagandhi_]

i've always thought that they were just blasting silence at full volume through the headset

[@robertfrench4847]

Very impressive sound design. The noise canceling effect at the end is mint!

[@reyantm]

Waiting for a speaker that capable to cancel out noise for the whole room.

[@boazmaragua5532]

Narrator's noise cancellation at the end is so G.O.A.T.E.D!

[@essamalghamdi4720]

The bit rate killer

[@Frizou]

I've always been confused as to how adding a second inverted noise actually cancelled it in a way that worked like protection. I understood from past explanations that it did by kind of "averaging" it out to put it in simpler terms but I never got why this would make it any safer for helicopter drivers and the like, but now I finally understand why it doesn't just blast your ears with double as much noise!

[@AverageSensei]

Fun Fact: Active Noise Cancelation makes your brain work extra hard, therefore often leading to headaches

[@PatrikTheDev]

This is such a good explanation, I knew how they worked but this makes it extremely clear

[@shawksn2107]

Thanks you for choosing the best instrument for your video.