How to create absolute silence? Anechoic rooms

[@ScienceClicEN]

I had the chance to spend a day at the Laboratory of Mechanics and Acoustics of Marseille, in France, to visit their anechoic rooms and meet the researchers who work there. I invite you to watch the video of the interview that was made on this occasion (English subtitles available): kzbin.info/www/bejne/e6XCYn1phMSjnJo

[@vibaj16]

To get rid of low frequency sounds as well as high ones, instead of the active cancellation, could very large wedges be put on the walls, to trap the large wavelengths, and then have smaller wedges lining the sides of the large wedges, kind of like a fractal, to trap the rest?

[@SumeetKumarHC]

This channel is literally giving us very easy explanation such a huge concepts. Hats off to you Science clic English.

[@ScienceClicEN]

Thank you 🙏

[@anonymous-rb2sr]

It's the positive about having a language most of the world speaks, ScienceClic is technically a french channel, with scienceclic english being a translation of the main channel kzbin.info Surprisingly Scienclic has still more subscribers than ScienceClic english, despite there being a far larger number of people who speak english than french, I wonder why, I was expecting the opposite

[@anonymous-rb2sr]

@@ScienceClicEN yep you do great work, both Roussel and Masson 👍

[@hudatolah]

Yeah, I want to move nearby to the very city these guys live in and create a politically sound proof room. Perhaps we will actually get things done. This channel is what I imagined people would focus on when I grow up.

[@skylarkesselring6075]

@@hudatolah this is the stuff a lot of people focus on. I rarely hear political shit because I don't entertain it. I ignore the news, don't click political videos/links, etc. Just consume science shit and do science shit n ignore the politics

[@gooblepls3985]

Your narrator has very impressive pronunciation in English, French *and* German, and can switch between the languages on a whim, wow!

[@ScienceClicEN]

Glad you noticed it, he does a fantastic job!

[@narfwhals7843]

It's pretty impressive how well we can model reality with the "masses on springs" approach.

[@evanknowles4780]

Look out string theory! The thing that really describes reality the best is spring theory!

[@CRLBLD]

Recently heard from a guest of a Sean Carrol podcast: "To physicists, everything is a spring." 😉

[@Dth091]

Simple harmonic motion is everywhere if you look hard enough!

[@matejsvidensky3019]

Ngl, that change of accent at the very end from perfect English to perfect French was the most surprising thing in the whole video :D Which was btw great, as always :D

[@anonymous-rb2sr]

I think both of them are french, not just roussel but the translator (Octave, which is a pretty common french name, that comes either from the latin "Octavian" or a gallic equivalent) It's funny too, in the clip at the end he manages to switch to french instantly, but after speaking 2 sentences in french he takes him a second to speak english without a french accent again 😂 11:36 he says "video ecoscientific project" while still speaking with the french pronunciation, it's intresting how our brains deal with accents, as different languages arent just languages, they're accents too, so when you switch from speaking french to speaking english, you also have to switch your "accent"/way you pronounce words, and this can cause even someone who normally speaks a foreign language without accent to go back to having an extremely strong one, which is actually something that is very hard to do on purpose I've notice, if you speak multiple languages very well try to speak a foreign one you know with a thick accent, it's pretty hard to do

[@matejsvidensky3019]

Yeah, you’re right, I just hadn’t thought about it before, even though I had seen the name Octave at the end of the videos :D And switching accents in front of foreigners is a great fun, it’s a skill worth mastering :D

[@MatheusCosta30s]

This channel is super underrated. Your work is fenomenal and should reach much more people. The way I see it, channels like this has a pottential to stimulate the develpment of many young minds, that will someday increase humanity's scientific capacity towards finding the explanation - or the equation - of everything.

[@VladimirSkultetyOfficial]

Your channel has the best videos on science I've seen. Thank you for the great work. Great attention to detail too, like playing the notes in tune with the background music at 8:05.

[@gxjansen]

9:35 "this very ambitious project that will RESONATE on an international scale" I hope for the project creators that it doesn't! 😂😂😂

[@ScienceClicEN]

Ahah good catch 😉

[@InternetDarkLord]

I was walking alone in Death Valley one day, and something seemed wrong. I stopped and listened, and I realized that because there was no wind that day, there was literally no sound. It was an eerie experience.

[@jackback70]

ScienceClic is one of the few channels that are worth the bell.

[@fufaev-alexander]

These videos are so satisfying to watch!

[@Nebuch]

Incredible techonolgy, i think acooustics and harmonics are way more important than we invest into.

[@istrumguitars]

I agree, for sure. Property managers everywhere… listen up. Make soundproofing the standard, then watch the noise complaints slow to a trickle. That’s good for everyone.

[@whirledpeas3477]

Bravo, a genuine human voice. Thank you

[@sleekweasel]

I almost fell off my chair at the abrupt switch between English and French accents! Manifique!

[@Kaola030]

这个视频做的太棒了！我反复看了好几遍。把隔音和吸音以非常生动和通俗易懂的方式讲出来，让我受益匪浅！对于做自己家庭影院的隔音和吸音来说，认识原理能更有目的的行动！十分感谢ScienceClic English频道！

[@godusopp279]

Like always one of the best science youtube channels.

[@shawnkulakowski9272]

Such an interesting topic that I knew absolutely nothing about before this video!

[@danydhondt4677]

as always: superb video. It's the science off course, but on top of that: excellent infographics and perfect voice-over. Thank you so much for these pieces of art!

[@kedrednael]

Such a beautiful visualisation of the sound!

[@ScienceClicEN]

Glad you liked it 🙏

[@PlenumGaming]

Wow this video was immensely detailed and filled with subtleties!

[@neillunavat]

Clicked on this faster than the speed of sound.

[@zaiffyyy]

Exactly what happened 👍😁😌

[@eddiejohnston1853]

There had to have been a 'sonic boom' moving at those speeds 😉

[@carcarki5818]

You're not human

[@snapper1627]

@@eddiejohnston1853 unless he's in a vacuum xD

[@NumanAhmed-ry3ti]

no you didn't dont lie! you cant move that quick!

[@pavelghiurca307]

I really like his voice and the way he explains it.

[@LuProch]

This channel is an absolute masterpiece.

[@mozzerianmisanthrope406]

Welcome back, it's been a while! An interesting topic as always.

[@Name-js5uq]

The split-second I hear that super awesome learning music I hit that thumbs up on immediately

[@josevenegas9191]

Excellent job explaining that interesting topic. Thank you sir

[@EricBrwn_369]

this channel. issa blessing!🙏🏽

[@christophercharles9645]

As a bassist, I wholeheartedly support research into sound properties and hope that it enhances how we hear my instrument both on recordings and in live performances.

[@JayKnight]

I got to visit the anechoic chamber at my university. Super neat experience. Great video as always.

[@samuelthiongo2230]

I've come as fast as the notification popped😂this channel is addictive

[@whirledpeas3477]

Damm, I thought my life was boring.

[@adikrah]

Love your awesome vids!

[@ejuan73]

Anechoic chambers are also used in many Telecommunications projects, ie. measuring antenna’s characteristics and other measures…

[@derekspitz9225]

First time I stepped into an anechoic room I nearly fell over. Shows how much we rely on sound to maintain balance.

[@tonynagy2042]

Harmonic resonance can move mountains. Frequencies are fascinating, as 'Everything' has it. Cheers.

[@jaker721]

Thank you for making this. I always love it when you make a video.

[@beabzk]

Wow, I had this question for a while now. Thanks, great video. I feel like you are too underrated. But keep up the good work!

[@ScienceClicEN]

Thanks! Glad you liked it :)

[@talhacals4729]

Not only for sound waves, anechoic chambers also using for antenna measurement which for suppresing the electromagnetic reflection

[@MoshkitaTheCat]

Simply stunning

[@ytbasketball101]

Yay another great video I can watch!

[@yigitpercin8444]

Your videos always remind me that you can understand and even invent many things by only using pure imagination. That way of think is so cool. This explains why i love physics though.

[@Jayderzomb]

Very interesting!

[@RecursionIs]

Great work Alessandro! These animations will certainly provide many with invaluable intuition. Have you heard of "Huygen's principle of secondary wavelets"? It provides a great explanation as to how these waves propagate in 3D space, including around objects. I'd love to see your take on the topic 🚀

[@Tenyasen]

I think he's not Alessandro

[@linuxp00]

@@Tenyasen Alessandro is the man responsable for these amazing animations, Octave is the brilliant narrator of the channel. A great duo

[@Tenyasen]

@@linuxp00 Yes and sometimes Alessandro does both, but it's true that between them they make a good duo

[@anonymous-rb2sr]

@@Tenyasen Alessandro is the guy behind the videos, he has a channel called "ScienceClic" but they are in french only, as he is french himself, Octave Masson is the translator/narrator for ScienceClic English That's why in this video and others you see places and scientific institutions in France mentionned (in this one the LMA in Marseilles, which is in southern France)

[@m.venkadesen9037]

I am now studying high school meanwhile iam interested in quantum physics I am clearly understood concepts by your videos pls give some more videos

[@avefuqua]

You’re a Smart guy 👏

[@KeyurRohit]

Love this channel

[@bernardheathaway9146]

Great job!!!

[@-JA-]

Thank you.👍

[@BlackWolf6420]

Amazing! Thank you 🙏🏻

[@cortempestas2982]

great video as always. can you do a series on the Standard Model, that would be very cool

[@rens8664]

he has one already, its good

[@cortempestas2982]

@@rens8664 you are right, but I would have been more interested one that has more math like he did with the general relativity, videos.

[@tops1954]

The disturbance in the atmosphere that creates waves in the air is we call sound but it’s a phonon. (A wave of disturbed air called a sound wave is a phonon)

[@lorenzoferrari4503]

I have two questions, let’s say we wanted to measure a particularly faint sound source within this room: does earth’s gravity affects the air molecules in which it propagates in such a way that we could consider the sound itself distorted? Regarding the next question I was just wondering how they manage the noise from the lights, considering there were many in the videos you showed.

[@drbuckley1]

Great work.

[@utilizator500]

Amazing video

[@ivanhagstrom5601]

This was super interesting!

[@ScienceClicEN]

Thanks!

[@skwiggsskytower2517]

not sure how I was subscribed to this but I'm thankful. Did this channel go by a different name before?

[@ScienceClicEN]

Glad you like it! No the name hasn't changed 😉

[@toaignika16]

Marvelous

[@crp5591]

Excellent!!!

[@davefilms7422]

you guys make awesome videos

[@BBBrasil]

Au clair de la lune, mon ami pierrot :-) love it

[@Fzlse]

So good

[@ScienceClicEN]

Thanks 🙏

[@bitkurd]

Welcome back to ScienceClic

[@AverageAlien]

this guy went from like 50k to 250k subs in a couple of months, nuts

[@KeyurRohit]

Everybody share this video and channel ❤️

[@adamrspears1981]

4 dimensional space-time seems to be fluid. Mass & Energy are 2 sides of the same coin. It almost seems like the more mass something has, the more energy is available to curve space-time. What if space-time is like water, in that if you add energy to it, it changes? If you compress a spring, its mass increases. Because you put energy into the spring as you compress it. I think this might be important when thinking about Gravity, too. Energy into a spring increases its mass. Increase in mass, increases curvature of space-time around the mass. By compressing a spring, you affect the curvature of space-time around the spring. Because Mass & Energy are 2 sides of the same coin. Another example is: If you have 2 identical cups of coffee (atom for atom, exactly identical) ...The cup with warmer coffee will have a greater Mass. Because heat stems from kinetic energy of vibrating atoms. Energy & Mass are 2 sides of the same coin. So your Microwave oven is essentially just a "Mass Increaser". Because it puts thermal energy into your food, & the Mass of your hot food has increased. -But where does a Microwave oven get energy to come on & work?... From electricity used to do work via closed electrical circuits. -Well where do that electrical energy comes from?... It comes from electric (& magnetic) fields. -Where are these fields?... They are part of an aggregate of fields that permeate the whole of space-time. The energy that flows through a closed electrical circuit is essentially leached from space-time & then used to do work. & then restored back to space-time. Nick Lucid from Science Asylum explains this beautifully. -This shows that Energy, Mass, space-time & gravity all work together. & since there _is_ a relationship between Gravity & Mass, I think its worth asking where Energy comes into play with gravity. If the energy density of a unit of space-time increases, is the curvature of that unit of space-time affected? My guess is yes. & I bet Blackholes prove it to be true. What if a Singularity is just that?... A total saturation of energy density per a planck unit of space-time?... #ThinkAboutIt

[@aniksamiurrahman6365]

This is totally RAD!!!

[@cortempestas2982]

finally a perfect room for us introverts

[@echochamber.]

Bravo!

[@teemo8247]

jadore tes videos! continuer upload eux!

[@MrTechnopedia]

As a student of physics, I found a catch in the video Sound travels faster in cold air and slower in warm air as air get contracted in low temperatures eg. In winters, train's whistles are heard clearly from long distances as compared to that in summer

[@specialkonacid6574]

I wonder if humidity has an effect? Perhaps reflective qualities of the snow?

[@henidhia8028]

الله اكبر الحمد لله لاحول ولا قوة الا بالله اللهم صل و سلم و بارك على سيدنا و نبينا محمد

[@ThomasHaberkorn]

as sound is described to be a spherical wave, the waves sound also propagate behind the speaker. is this right? see time 5:37 however, the speaker should also have directional properties..

[@linuxp00]

Greater wave lengths act as plane waves, as if the source is very distant. Smaller wave lengths are absorbed by the foam wedges.

[@aidanm3387]

Anh hát bằng cả trái tim bảo sao mà cứ ngọt lịm như vậy. Bài nào cũng cảm xúc luôn

[@TomOffgrider]

perfect!

[@lexnicolai1442]

Could antisound in principle remove the need for the cumbersome and costly wall decoration, wall thickness and insulation? Very interesting video! Thnx

[@nihil_._sum]

nice

[@LBTennis]

Best videos

[@meadiyodi]

Is there any way to make rooms ventilated ? Or how it's done if we wants to stay hours ?

[@zabirmhmahdi4203]

When the two sound wave cancles in the room ,, where does the energy go???

[@noobycreeperbruh4940]

So, would a bat just continuously fly into the walls???

[@HappyGaminz]

I would like to have a room like this of my own, so I can just go in there and relax.

[@thankyou991]

COOL... I use my closet to make an Anechoic room :D

[@Tom_Quixote]

I wish you had gone into more detail about why longer wavelength soundwaves are not blocked by the foam wedges. It doesn't seem clear to me

[@zharul8716]

I'm not quite get it. How the low frequency sound can't be trapped by wall wedges?

[@linuxp00]

They are same size of the walls of the studio, travelling almost like a second wall of sound (imagine a large water wave breaking on the sand of the beach, its seems to hit straight for various meters) that make them undisturbed by the foam wedges on the walls, that only traps high pitch waves because they are smaller in size.

[@zharul8716]

@@linuxp00 Oh I get it. Thanks.

[@Tom_Quixote]

@@zharul8716 I still don't get it. Even if the wave length is very long, it's still made of small particles that get pushed forward and collide with the foam wedges..

[@alexandrutofan3453]

​@@Tom_Quixote Image a small ball and need to hit the floor you need same small absortion and for a big ball sale something similar ... Sound is a mecanical energy in some way i see somewhere say... I do try for last year long to see any material other than vacuum that slow the sound so im around subject... Sound need a medium to travel without no move ;).

[@ashroskell]

Those mics would need to be placed in the centre of the room as well as around the walls, or they won’t be able to cancel the sound until it’s too late, surely? Noise cancelling headphones are so effective because they’re right next to your ear, with no (perceptible) distance allowed for the sound to travel in either direct. Your French is very elegant btw.

[@andreacosta2238]

Are you going to do Quantum chromodynaics? Great video as always!

[@EspHack]

why is it that ANC only cancels low frequencies then?

[@emirkenrick1590]

I am 13 and have a solid understanding of quantum physics including the Heisenberg uncertainty principle as well as quantum fluctuations and quantum electrodynamics. I do, however, have a feigned understanding of quantum field theory as well as symmetries in the universe. Can give me a watered down explanation

[@soda35160]

I wanna sleep in a room like that so bad

[@hoomansanati173]

👏👏👏👏

[@frantisekvtelensky820]

I love it! But as a guitarist, I can't imagine the world without reverb. 😂

[@jhrmd]

Absolute silence would kill my ears and my mental being lol Just thinking about silence makes my tinnitus scream hard!

[@executive]

why aren't the walls antiparallel?

[@RahulDas-gk4zi]

hey genius!!! please upload a series on mathematics of QFT just like the one of relativity .. it is the most needed thing right now

[@bobwilliamson5574]

Why is there a background noise in this video?

[@hedosgunay7758]

Please please put turkish translation

[@Masanumi]

I got misophonie, this room is my dream... Pure... Silence...

[@linuxp00]

Getting an active sound cancelling headphone would be great, in case you already don't have it

[@Masanumi]

@@linuxp00 Thanks, I already searched for them. They are very expensive though...

[@linuxp00]

@@Masanumi indeed, but maybe you can get a cheaper one on eBay or another online shop, it's certainly worth it

[@LucasAlmeida-dz5xh]

You’ve designed the perfect isolation chamber 😂

[@X1Y0Z0]

❤️🙏🏽😀

[@Markfr0mCanada]

I had fallen asleep to this, then 6:32

[@tyrone2572]

His french at the end😂