How Highway Noise Barriers Can Make Traffic Louder - Cheddar Explains

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  • เผยแพร่เมื่อ 5 ธ.ค. 2024

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  • @tbthegr81
    @tbthegr81 3 ปีที่แล้ว +827

    In Sweden, all noice barriers I see is made out of wood, and shaped in a way to try to catch and trap sound. Where each piece of wall is an S-shape, where I assume they aim to trap sound in the "boxes"

    • @potto1488
      @potto1488 3 ปีที่แล้ว +19

      Here in Britain too

    • @davidrubio.24
      @davidrubio.24 3 ปีที่แล้ว +20

      I haven't seen many noise barriesrs here in Spain. But the only one that I can remember has the S shape too.

    • @ARCGrayist
      @ARCGrayist 3 ปีที่แล้ว +56

      The S shape is because Sweden starts with an S

    • @davidrubio.24
      @davidrubio.24 3 ปีที่แล้ว +64

      @@ARCGrayist That's why we also have them in Spain...

    • @lourencovieira5424
      @lourencovieira5424 3 ปีที่แล้ว +17

      In portugal they are made of plastic and are usually transparent with bird designs on it

  • @_ikako_
    @_ikako_ 3 ปีที่แล้ว +903

    As any City Skylines player will tell you, trees are the best solution to noise pollution. Not only do they have far more surface area to absorb sound over, they also have the added benefit of absorbing some of the pollution from the cars on the road.

    • @welcomb
      @welcomb 3 ปีที่แล้ว +51

      That's what is done in my city. Trees and tall hedges line the highways. Even pedestrian pathways along major roads have vines too block the dust and noise.

    • @_ikako_
      @_ikako_ 3 ปีที่แล้ว +86

      @@bingosunnoon9341 well the trees that line 90% of England's motorways seem to be doing just fine

    • @mkviis
      @mkviis 3 ปีที่แล้ว +87

      Bro I just delete their homes if they nag about everything

    • @vashishtshaurya
      @vashishtshaurya 3 ปีที่แล้ว +36

      @@mkviis I want you to be the mayor of my state

    • @enterpriset
      @enterpriset 3 ปีที่แล้ว +77

      Better leave it to the actual engineers then because in the real world it doesn't work. Studies (notably: Leonard, Raymond E., and Sally B. Parr. "Trees as a sound barrier." Journal of Forestry 68.5 (1970): 282-3) have found that even 30 meters of dense foliage will only drop sound levels by ~6db. Having to buy an additional 60m of right of way for a highway to plant trees, only for such a small impact is not as effective as other types of sound mitigation.

  • @bgovetas
    @bgovetas 3 ปีที่แล้ว +568

    Diffusion and absorption are the way. Reflections literally create an echo chamber. Physics are cool

    • @FoxDren
      @FoxDren 3 ปีที่แล้ว +28

      Definitely, a "green wall" of trees works wonders and is used in many countries.
      Also looks nicer

    • @Mariet31
      @Mariet31 3 ปีที่แล้ว +8

      Heck... even planting trees would have helped to absorb noise.

    • @DonnaChamberson
      @DonnaChamberson 3 ปีที่แล้ว +1

      @@FoxDren how dare you

    • @DMTHOTH
      @DMTHOTH 3 ปีที่แล้ว +1

      this is why every other first world country has patterned thin wood/metal sound barriers, instead of concrete wall.

    • @descoiatorul
      @descoiatorul 3 ปีที่แล้ว +5

      @@bingosunnoon9341 that's stupid and if you did any research on it, you'd know it too. Tree curtains are THE BEST way to cancel noise. If they are planted at the proper width and density, going from bushes to small trees and then taller trees to cover any vertical gap and they can cancel almost 90% of the noise.
      Also, a proper tree barrier protects not just from the sound, but will also protect the road from harmful weather, by trapping winds and snow.
      Furthermore, tree curtains were shown have another benefit: they reduce the severity of roadside accidents. When a car leaves the road and slams into a concrete barrier, it will most likely result in deaths. When a green barrier is installed, the car is slowed down by the vegetation before reaching the tallest and most solid trees in the back, thus reducing damages to the car and the severity of the impact.
      Last but not least, trees protect nearby residences from pollution. In addition to trapping cross winds, they also trap dust emanating from the highway.
      This is all common sense in Europe and has been used successfully for decades. The US is doing almost everything wrong because of corporate interests. After the initial planting, trees grow by themselves and maintenance cost in minimal. Maybe you will have to replant some bushes or trees after accidents, but that's it. Meanwhile concrete walls make a lot of money for the politically-connected contractor, while having all sorts of negative environmental impacts: they amplify noise through sound deflection and reverberation (sound waves trapped between two barriers are amplified), they not only stop dust but create more, they are an eyesore, etc...

  • @NotJustBikes
    @NotJustBikes 3 ปีที่แล้ว +292

    Huh. I was just researching a video about urban noise. This is good timing!

    • @Flagen579
      @Flagen579 3 ปีที่แล้ว +25

      Hey, if it isn't my favourite (not just) bike infrastructure channel!

    • @sanchises
      @sanchises 3 ปีที่แล้ว +3

      Have you seen the noise barriers on the A2/N2 Eindhoven ring road? They're made of perforated tubes that are supposed to dissipate the noise energy. And they're very pretty

    • @gus4198
      @gus4198 3 ปีที่แล้ว +3

      It’s the algorithm. You should watch “the social dilemma” on Netflix

    • @paschadoudou
      @paschadoudou 3 ปีที่แล้ว

      Just bikes

    • @intensivecareunitpee5838
      @intensivecareunitpee5838 3 ปีที่แล้ว

      it's called data harvesting and tracking

  • @c182SkylaneRG
    @c182SkylaneRG 3 ปีที่แล้ว +313

    Sooo.... what about trees? Plant a good 20-30 ft thick row of trees, make sure they're a fast-growing, dense-foliage species of evergreen. They take care of themselves, they're soft so they absorb the noise, and the dense foliage and 20-30 ft thick row makes sure that there aren't large holes for sound to pass through. Drivers get something green to look at, instead of grey, residents get something green to look at, instead of grey. Road noise isn't refracted over the barrier, it isn't reflected back on cars, and we get a 1st stage filter on all the C02 being produced.

    • @Nilsy1975
      @Nilsy1975 3 ปีที่แล้ว +43

      Plus trees would filter out particulate matter and other pollutants.

    • @StLouis-yu9iz
      @StLouis-yu9iz 3 ปีที่แล้ว +24

      I like your idea but I think there should be some broad leaved trees mixed in with the evergreens. Even though they wouldn’t look as good in the winter they are still better at absorbing greenhouse gases.This would be even prettier too.

    • @DSQueenie
      @DSQueenie 3 ปีที่แล้ว +8

      They’re expensive to maintain. You’d need gardeners to trim them every day in summer.

    • @Nilsy1975
      @Nilsy1975 3 ปีที่แล้ว +18

      @@DSQueenie we use trees as sound barriers here in the UK.

    • @henrydavis4236
      @henrydavis4236 3 ปีที่แล้ว +46

      @@DSQueenie What trees grow so fast they need to be trimmed daily?

  • @nixboox
    @nixboox 3 ปีที่แล้ว +176

    This is exactly what happened by my house. The side closest to the road needs to be made to look like recording studios with sharp pointed angles to break up the soundwaves instead of just flat surfaces for the sound to bounce off of and spread out.

    • @jim-7965
      @jim-7965 3 ปีที่แล้ว

      yesss

    • @nadeemnajimdeen5717
      @nadeemnajimdeen5717 3 ปีที่แล้ว

      I think many of them are.
      Just that not all counties and state govs have used them.

    • @florichi
      @florichi 3 ปีที่แล้ว +1

      Cones would diffuse the sound, but not trap/absorb it.
      Most sound barriers in Austria are either made out of long strains of wood waste glued together to have cavities in it (like the porous asphalt they were talking about in the video) or sheet metal cases with tiny holes in them and some sort of absorption material in it. Only a minority of the barriers are glas or flat concrete walls.

    • @TMS5100
      @TMS5100 2 ปีที่แล้ว

      this is exactly what they are doing with newer barriers.

  • @danielantoniozd26
    @danielantoniozd26 3 ปีที่แล้ว +222

    I grew up near a major hwy, even at 200 feet I could still hear it.
    Now I need it as whitenoise to sleep.
    I don’t like a quiet house at night.

    • @jgroenveld1268
      @jgroenveld1268 3 ปีที่แล้ว +11

      @Evil Pimp I wish I could do that. I used to struggle with any noise or light source. Now what I have managed to do is that I learnt to sleep with white noise in this case my fan to drown out others noises especially voices that prevent me from sleeping. Light is still an issue for me so anything with as small as standby lights on tvs for example I would apply a little dab of electrical tape to block the light.

    • @jeffreyanderson1851
      @jeffreyanderson1851 3 ปีที่แล้ว

      Sounds like the ocean

    • @solidsnaker1992
      @solidsnaker1992 3 ปีที่แล้ว +1

      kids provided me immunity to sound while asleep lol

    • @brandonaynesmay352
      @brandonaynesmay352 3 ปีที่แล้ว

      Geez some people need quality sleep. No offense :D

    • @jwhite26
      @jwhite26 2 ปีที่แล้ว

      Thanks for sharing

  • @sabikikasuko6636
    @sabikikasuko6636 3 ปีที่แล้ว +611

    So basically, concrete is so convenient that even after it's been proven that it not only doesn't work, but it makes the traffic noise *worse* and more deafening, the state won't do anything because doing so is a pain in the ass.
    Yeah, sounds about right.

    • @nietur
      @nietur 3 ปีที่แล้ว +8

      As politician, explain to everyone why you won't do anything against the sound pollution.

    • @bcubed72
      @bcubed72 3 ปีที่แล้ว +16

      Even if it is louder when installed (And TBH I don't find "online journalists" UnDark reliable)...let the vegetation grow over it, and it will prevent this phenomenon. The Kudzu will quiet it down in a year or so.

    • @TheKitMurkit
      @TheKitMurkit 3 ปีที่แล้ว

      Should have made cones on the barrier

    • @TheAvsouto
      @TheAvsouto 3 ปีที่แล้ว +17

      New infrastructure is mostly subsidized by federal money, but reparing/maintaining/removing old infrastructure is paid almost enterily by the city and a bit by county/state. Most cities are not flooding with money so they opt to not do nothing to not go bankrupt

    • @jackgerberuae
      @jackgerberuae 3 ปีที่แล้ว +1

      @@TheKitMurkit please explain more?

  • @mcmurdo75
    @mcmurdo75 3 ปีที่แล้ว +395

    Trees and bushes combined make for the best sound barrier and they have environmental benefits like cleaner air

    • @TomUniverse
      @TomUniverse 3 ปีที่แล้ว

      Good idea.

    • @Gnefitisis
      @Gnefitisis 3 ปีที่แล้ว +4

      Very bad idea. You don't want trees near fast moving cars. Because you don't tend to bounce off of them during accidents.

    • @jasperschlief
      @jasperschlief 3 ปีที่แล้ว +42

      @@Gnefitisis don't you have a normal steel barrier, and then in the background for the noise cancellation some nature

    • @maggiejetson7904
      @maggiejetson7904 3 ปีที่แล้ว +11

      @ They absorb like a sponge, but as @Gnefitisis said you will die if you hit it rather than bounce off.

    • @captainspongeboy
      @captainspongeboy 3 ปีที่แล้ว +32

      Acoustic Engineer here. Trees and bushes don't work. Sound is like water, it finds its' way through any gaps. Trees and bushes have huge gaps and so do almost nothing to reduce sound. There is an ISO standard that says that the attenuation through a wooded area is only (on average) 0.02 dB/m! Although, trees can provide masking by rustling in the wind.

  • @additionad
    @additionad 3 ปีที่แล้ว +1661

    Trees work better.

    • @AustinMeltonADM
      @AustinMeltonADM 3 ปีที่แล้ว +167

      Agreed. I live a few hundred feet from the interstate. Thankfully there are plenty of large mature trees that make the sound all but disappear. It’s a bit more noticeable in the winter though.

    • @bryntownshend6528
      @bryntownshend6528 3 ปีที่แล้ว +181

      They look nicer and are less susceptible to vandalism than a concrete wall too

    • @bryntownshend6528
      @bryntownshend6528 3 ปีที่แล้ว +60

      As are mounds of earth which can look more natural as well

    • @TheAvsouto
      @TheAvsouto 3 ปีที่แล้ว +56

      It's also a lot nicer to have trees around rather then having concrete walls to stare at

    • @vicgamesvt9682
      @vicgamesvt9682 3 ปีที่แล้ว +35

      The issue with this is you have to layer trees and with how little space their is between the highway and house there probaly isnt enough space to get enough layers of trees.

  • @philplasma
    @philplasma 3 ปีที่แล้ว +166

    Highway, then train tracks, then thin row of trees. That's what I have to deal with; no concrete noise barrier and apart from when the engine part of the train passes the noise I get from the highway and the train tracks are well within my comfort zone.

    • @trainsandmore2319
      @trainsandmore2319 3 ปีที่แล้ว

      @@c182SkylaneRG That's what you always see in Singapore's East Coast Parkway

    • @morfgo
      @morfgo 3 ปีที่แล้ว

      haha where do you live

    • @cmontes7961
      @cmontes7961 3 ปีที่แล้ว +1

      Move!

    • @ToryFromDC
      @ToryFromDC 3 ปีที่แล้ว

      Sounds like near Washington DC

    • @trainsandmore2319
      @trainsandmore2319 3 ปีที่แล้ว +1

      @@ToryFromDC for me probably near LIRR

  • @Lunavii_Cellest
    @Lunavii_Cellest 3 ปีที่แล้ว +160

    in the netherlands we build hills out of earth next to highways to have reduced noise whilst it looking better and also working better

    • @CT-vm4gf
      @CT-vm4gf 3 ปีที่แล้ว +12

      That’s great, if there’s room.

    • @CapnCody1622
      @CapnCody1622 3 ปีที่แล้ว +33

      In the US we don’t care what’s better. Only about what’s cheaper. Not saying that’s how it should be. It’s just how it is…

    • @DSQueenie
      @DSQueenie 3 ปีที่แล้ว +5

      Unfortunately that takes up a lot of space.

    • @babo2303
      @babo2303 3 ปีที่แล้ว +9

      Also the road surface is very different in the Netherlands. Almost all highways have this porous asphalt (what the guy was talking about) which reduces noise 🤗

    • @_ikako_
      @_ikako_ 3 ปีที่แล้ว +1

      there's also that park that was built to counteract the frequencies of sound from a nearby airport that the residents were complaining about

  • @far574
    @far574 3 ปีที่แล้ว +49

    I used to own a house a couple homes next to the freeway. Since we were on a hill you could not see it. Pretty everyone that came to my house would ask where is the river ? It sounded like a running river. I am happy I no longer live near the freeway.

    • @dragorocky
      @dragorocky 3 ปีที่แล้ว

      Ours sounded like ocean waves. Interstate-15 North County San Diego.

    • @insectbite1714
      @insectbite1714 3 ปีที่แล้ว +1

      @@dragorocky California cars make extreme amounts of pollution so your health is at risk too.

    • @AtomicSource11
      @AtomicSource11 3 ปีที่แล้ว +1

      Ahh, you would have just been getting the low.frequency sounds that have wavelengths longer than the wall was high. They can pass over the wall as if it's not there

  • @murdelabop
    @murdelabop 3 ปีที่แล้ว +234

    Not building interstate highways through residential areas would probably also be a good idea.

    • @jarynn8156
      @jarynn8156 3 ปีที่แล้ว +13

      Those residents need to be able to get around though. Ultimately, you are going to need major roads near residential areas because those residential areas are what creates all the traffic.

    • @VanganPL
      @VanganPL 3 ปีที่แล้ว +40

      @@jarynn8156 That traffic doesn't need to be on a single road, and doesn't need to be at fast speeds. Leave the highways outside of the city and most of the problem will be solved - people will drive through multiple smaller roads to get to their homes, rather than having their homes cut off from the rest of the city by a highway...

    • @JaneDoe-dg1gv
      @JaneDoe-dg1gv 3 ปีที่แล้ว +25

      How about using higher density residential zones to make public transport cheap enough to switch to, even with automobile and oil subsidies keeping car prices artificially low.

    • @PAYTONLB999
      @PAYTONLB999 3 ปีที่แล้ว +8

      @@VanganPL you understand that doesn't work. Right? Phoenix didn't have a ring road until very recently, and it had some of the worst traffic ever. It had exactly what you said and had far worse traffic than cities much much larger than it

    • @_ikako_
      @_ikako_ 3 ปีที่แล้ว +9

      @@PAYTONLB999 more, and more efficient, public transport infrastructure would do way more to curb traffic than more and bigger roads can.

  • @krisP16
    @krisP16 3 ปีที่แล้ว +10

    I noticed this in the small town I grew up in. There was a railroad track going through town in a deep trench. When the train would sound it's horn it would be extremely loud and annoying. I always wondered why they didn't just put the train tracks on level ground. Also, the house I live in now has the highway noise problem. We are 150m or 492ft from the highway barrier and the sound is deafening at times. Honks, sirens and street racers can be heard as if they're right outside our house. I hate being outside in the afternoon especially when trying to have a conversation.

  • @minion2702
    @minion2702 3 ปีที่แล้ว +80

    typing from nottingham uk. trees and hedges they do exactly what you need them to do, look pretty and reduces noise

    • @The_-_-
      @The_-_- 3 ปีที่แล้ว +2

      More cost effective too

    • @maggiejetson7904
      @maggiejetson7904 3 ปีที่แล้ว

      @@The_-_- Not really if you factor in the landscaping cost.

    • @BossInvader1
      @BossInvader1 3 ปีที่แล้ว +6

      @@maggiejetson7904 But not $2,000,000.00 ( 0:19 ) per mile to maintain unless its all Bonzai trees or something I can't think of that would cost that much to maintain.

    • @Vale-nh6ey
      @Vale-nh6ey 3 ปีที่แล้ว

      @@BossInvader1 that isn’t to maintain, it’s to build

    • @nicolaim4275
      @nicolaim4275 3 ปีที่แล้ว +4

      I think natural sound barriers are easier to use in Europe because we generally have climate more suited for life. A lot America is too hot and too arid.

  • @55oblivion55
    @55oblivion55 3 ปีที่แล้ว +12

    The different types of asphalt/"pavement" make a HUGE difference. We have two types here in Germany. If a highway (Autobahn) section needs to be replaced, they use the "new" less noisy type. You will notice the severe change in noise when driving from the old road onto the new one. Its less than half the noise at least, as far as I can tell.

  • @santiagoescobar6239
    @santiagoescobar6239 3 ปีที่แล้ว +109

    Maybe the ussage of trees will do the same intended purpose but also improving air quality... don't know why it is not used already

    • @itsnotmily
      @itsnotmily 3 ปีที่แล้ว +5

      because you're assuming trees will do a good job of reducing noise based on nothing?

    • @jarynn8156
      @jarynn8156 3 ปีที่แล้ว +25

      @@itsnotmily Sound is vibrations. Absorb the vibrations, absorb the sound. As the video explains, the problem with sound barriers isn't the wall itself, its the material its made of. A hard concrete wall bounces sound. Soft materials absorb it. So a tree line would absorb the sounds.

    • @eliscanfield3913
      @eliscanfield3913 3 ปีที่แล้ว +7

      @@itsnotmily Well, which is noisier, a bare room full of hard surfaces or a room with carpets, furniture, and drop ceilings?

    • @santiagoescobar6239
      @santiagoescobar6239 3 ปีที่แล้ว +4

      @@itsnotmily based on that trees does have a lot of surface and moving structures and does serves as buffer barriers due to dampening the movement because the are flexibles contrary to what happends with concrete. Check it up, there are cool and interesting proyects around the globe like what is happening in South Essex
      www.forestresearch.gov.uk/tools-and-resources/fthr/urban-regeneration-and-greenspace-partnership/greenspace-in-practice/benefits-of-greenspace/noise-abatement/

    • @yvrelna
      @yvrelna 3 ปีที่แล้ว +5

      Trees does have the disadvantage that it requires much more maintenance then a simple concrete wall. Cleaning fallen leaves, trimming branches that obstructs the road, replanting trees uprooted by tornadoes, tree diseases, culling to prevent unwanted reproduction, etc. Often, there's even perverse incentives to use less effective solutions because highway constructions are often federally funded, but maintained by local governments, so the local government would very often opt for the low maintenance solutions even when it's not cost effective solution overall if you include the construction cost.

  • @jb6712
    @jb6712 3 ปีที่แล้ว +8

    For almost 3 1/2 years (Oct. 2017 - Feb. 2021), I lived in a dump of an apartment that was only 400 feet from one of the busiest freeways in the US. No barriers of any sort---not even a skinny hedge---to block the sounds, and the noise level was constant, loud, and hard to bear. My sleep suffered hugely for it.
    Moved to my current apartment In Feb. of this year; now the same freeway is about half a mile away, and there are numerous business buildings, as well as a small apartment complex of two-story buildings, between it and my place, and these buildings run perpendicular to the freeway, so any sound from there is mostly deflected back to it by those buildings. The only time I really hear it now is when the wind blows from the north---from the direction of the freeway---and it blows the sounds of the freeway between our buildings. It's so rare, it's not a problem, though.
    Then, only about 1/4 mile behind the apartments, we have a train track on which about six freight trains a day travel; again, though, not much of an issue---none, really---partly because they go through so quickly, and partly because there are a lot of trees and low, one-story buildings between the tracks and this complex. The engineers also don't get crazy with sounding the train's horns, using them appropriately for the 3 or 4 crossings near here, so again, not offensive.
    It's amazing, though, how moving back off the freeway by half a mile, and having those buildings (and some mature trees, though not more than a dozen) makes such a huge difference in sound. Now it's peaceful, and often downright quiet here, which I'm so very thankful for! My sleep quality has improved so much, I can't even compare it to the other place.

  • @iamcharlieza
    @iamcharlieza 3 ปีที่แล้ว +6

    In the Netherlands, there are glass barriers at some locations in the city. It's also angled and not 90 degrees. Don't know much about it but it seems very effective. They also use a lot of greenery and it seems to help as well.

  • @DougGrinbergs
    @DougGrinbergs 3 ปีที่แล้ว +22

    Noise control: reflection diffusion, diffraction absorption

  • @TheFantasyReason
    @TheFantasyReason 3 ปีที่แล้ว +24

    Cheddar always answering the questions in the back of my mind.

  • @lourencovieira5424
    @lourencovieira5424 3 ปีที่แล้ว +14

    In portugal they are made of plastic and are usually transparent with bird designs on it

  • @stevemc01
    @stevemc01 3 ปีที่แล้ว +48

    "You have become the very thing you swore to destroy."

  • @mikabankurofuto9879
    @mikabankurofuto9879 3 ปีที่แล้ว +36

    I always thought the wall was meant to separate the highway from other main roads for people safety, I never thought they're used as a wall barrier

    • @Milesco
      @Milesco 3 ปีที่แล้ว +1

      I assume you mean _sound_ barrier.

    • @methanesulfonic
      @methanesulfonic 3 ปีที่แล้ว

      same, because they're pretty useless for a sound barrier

  • @Malusdarkblades11
    @Malusdarkblades11 3 ปีที่แล้ว +33

    Where i live they use Earth walls they work well and get nice and green over time :)

    • @tcsnowdream9975
      @tcsnowdream9975 3 ปีที่แล้ว

      Yea, I lived near the chuo expressway in Tokyo and they used green barriers - lots of plants and trees in addition to the sound barrier. It looked nice and I barely heard anything.

    • @guardianoffire8814
      @guardianoffire8814 3 ปีที่แล้ว +2

      Ba Sing Se has earth walls made by earth bending....

    • @MilwaukeeWoman
      @MilwaukeeWoman 3 ปีที่แล้ว +1

      I'm not sure if there's a version of that useful where we have cold and snowy winters. Snow that has salt mixed in with it gets plowed right up to the wall, that would kill plants. There are houses right on the other side of the wall. I think concrete is the best we can do. I'm a block away and the sound might be louder for me because of the wall, but I knew that when buying the house and I find the white noise comforting. I can also hear trains. Lots of life around here, it's nice if it's your thing.

    • @emmamemma4162
      @emmamemma4162 3 ปีที่แล้ว +1

      @@MilwaukeeWoman We have those earth walls in Finland, snow and salt is not a problem.

  • @thomaswalsh4552
    @thomaswalsh4552 3 ปีที่แล้ว +17

    “Depending on distance, noise can reach 70-80 db at 50 feet” nice contradiction on the opening line

    • @nicolaim4275
      @nicolaim4275 3 ปีที่แล้ว +5

      It was probably an edit. "depending on the distance, noise can reach very high levels. It can reach 70-80 db at 50 feet".

  • @drink15
    @drink15 3 ปีที่แล้ว +3

    The barriers are already there and unlikely to be removed but they can be improved by adding bushes and veiny plants to grow up the wall. This should soften he wall and absorb some of the noise.

  • @daelbows5783
    @daelbows5783 3 ปีที่แล้ว +10

    We should build industrial areas around highways instead of residential. Industrial areas can deal with the highway noises, plus it will benefit the trucks that need to get places.

  • @julesjames593
    @julesjames593 10 หลายเดือนก่อน

    I've live directly across the street from a freeway exit noise wall. I was there before the wall was built. Its installation has been a game-changer. We can now have a sidewalk conversation. Of high significance is the message a noise wall sends: "This is an area to protect, please respect neighbors with lower speeds, quieter music and less litter." I-5 at Roanoke Street in Seattle -- the busiest stretch of highway in the Pacific Northwest. From experience: I support noise walls.

  • @cookieridergirl
    @cookieridergirl 3 ปีที่แล้ว +16

    I’ve seen wood barriers around where I’m from. Not sure if they are any better than concrete. Imagine maybe they absorb more sound. But still. Maybe put some trees there. I get perhaps it’s because the trees will take years to get to a good size. But if they had started back in the 70s it’s would have been effective by now. Probably last longer than a concrete wall. Looks better too for everyone involved.

    • @szeptacz5342
      @szeptacz5342 3 ปีที่แล้ว +1

      Trees would only work during warm months. No leaves - sound

    • @marklaw5116
      @marklaw5116 3 ปีที่แล้ว

      @@szeptacz5342 plant evergreen trees. Problem solved.

    • @MilwaukeeWoman
      @MilwaukeeWoman 3 ปีที่แล้ว

      @@marklaw5116 evergreen trees drop a lot of branches and many of them also pinecones. This would cause road hazards and also great expense cleaning up after them.
      Source: live a block from the freeway and have evergreen trees on my property.

    • @marklaw5116
      @marklaw5116 3 ปีที่แล้ว

      @@MilwaukeeWoman all conifers drop cones, but not all evergreen trees are conifers. There’s a huge number of evergreen tree species that don’t drop cones, especially in warmer climates (California and Texas would find it very easy to grow evergreens along their highways). But even in higher Katy it uses there are non-conifer options, such as live oak.

  • @TdaKraakGaming
    @TdaKraakGaming 3 ปีที่แล้ว +2

    The A7 highway in The Netherlands has a wall of dirt retained by steel skeletons with plants growing by side of it as a sound barrier. It truly works as it’s being reflected Bach to the road because of its shape and absorbed by the plants and dirt.

    • @judithp8552
      @judithp8552 ปีที่แล้ว +1

      Walls of dirt or mounds that are higher than the highest truck seem to work okay. A mound of dirt running the length of the house and as high as the roof of the house on the highway side. Netherlands and Germany are advanced in noise reduction for the health of people living in nearby highway residences...

  • @Lorryslorryss
    @Lorryslorryss 3 ปีที่แล้ว +68

    I mean, the whole building huge highways everywhere is an initially attractive, but ultimately terrible and unsustainable idea that the American have been continuing on with regardless. So it seems noise barriers fit quite well with the rest of what you're doing tbh.

    • @PAYTONLB999
      @PAYTONLB999 3 ปีที่แล้ว +3

      Ring roads and highways reduce traffic for large American cities

    • @rachelle2227
      @rachelle2227 3 ปีที่แล้ว +5

      As opposed to what? Public transport? Railroads, the best long distance public transport, is not realistic to be built to work for most US residents. The country is enormous, with so much open space. The money that would have to be laid down to even connect Chicago to LA, for instance, would be staggering.

    • @kazimir8086
      @kazimir8086 3 ปีที่แล้ว +4

      @@rachelle2227 wtf? Everyone else has already done it.

    • @JoCE2305
      @JoCE2305 3 ปีที่แล้ว +5

      @@kazimir8086 "Everyone else" (Europe) lives in a country the size of Texas with higher density. You underestimate the size of America.

    • @davidrubio.24
      @davidrubio.24 3 ปีที่แล้ว +12

      ​@@rachelle2227 Highways are okay for traveling between cities. The problem is when they are used to move around the city (instead of having a more dense city with public transport). That's when you have highways next to residential areas.

  • @stevepowsinger733
    @stevepowsinger733 3 ปีที่แล้ว +1

    I studied road noise years ago. What I found was low-frequency sound waves are tall and need a tall wall to stop them. It also helps to have texture on the wall or strategic grooves. The permeable road surface sounds like a good idea as it may help drainage as well.

  • @thefigg88
    @thefigg88 3 ปีที่แล้ว +5

    The highway by my parents got a noise barrier installed... for a cemetery and long stretch of wooded area.

  • @doe_maar365
    @doe_maar365 3 ปีที่แล้ว +1

    In the Netherlands the sound barriers are placed at an angel, so the reflections are directed to the sky. this method is way more expensive since the foundations of the barrier has to be complex, but it's effective

  • @ScoutyDave
    @ScoutyDave 3 ปีที่แล้ว +3

    In Sydney they put a lot of plants, trees, and vines on the walls to absorb sound. Also it helps with air pollution.

  • @gerardcurtis3911
    @gerardcurtis3911 3 ปีที่แล้ว +2

    in the UK I've seen lots of wood fencing, I imagine its a lot cheaper and more absorbing, but also they're not a flat line, so then the sound gets reflected randomly, being quieter

  • @watermeloninsideawatermelon
    @watermeloninsideawatermelon 3 ปีที่แล้ว +7

    okay but you could also just reduce the amount of vehicles by massively improving public transport especially in large and medium-sized cities, that would already make a big impact, be environmentally friendly and also give people social mobility.

  • @kopesetik
    @kopesetik 3 ปีที่แล้ว +1

    I live within a block of the 101 freeway in Los Angeles. There is a sound barrier here. But I live on the third floor and can hear traffic clearly. I have a direct line of sight.

    • @Ascertivus
      @Ascertivus 3 ปีที่แล้ว

      That’s sound diffraction in action! I find the fact that it’s so loud for you to be unfortunate. ://

  • @nik_evdokimov
    @nik_evdokimov 3 ปีที่แล้ว +3

    I live in Finland, and here often I see mounds of ground - looks nicer, more eco-friendly and is a soft material

  • @catcameron2495
    @catcameron2495 3 ปีที่แล้ว +6

    Cheddar always interesting. What about growing ivy, or something, up the walls? Or, idk, hedge rows. to help absorb sound.?

  • @Chantillian
    @Chantillian 3 ปีที่แล้ว +7

    3:10 - 50 ft, 100 ft, 200 ft, then 200 ft again...? I blame the viewers for not supporting Cheddar enough to hire a better editor. ;)

    • @doctordothraki4378
      @doctordothraki4378 3 ปีที่แล้ว +1

      I was looking for someone else who noticed that exact goof

  • @VinceTheCreatorr
    @VinceTheCreatorr 3 ปีที่แล้ว +2

    Engineers of these sound barriers finessed the city to build shitty concrete walls instead of just using trees.

  • @mbogucki1
    @mbogucki1 3 ปีที่แล้ว +5

    Always appreciate the metric conversions. Cheers from Canada.

  • @boriss.861
    @boriss.861 3 ปีที่แล้ว +1

    If you are going to put up a concrete wall, a wall that is shaped like an egg box and tilted towards the roadway should reduce the noise as the shaped zones will reflect and cancel noise and the tilted wall will direct the residual sound back to the source

  • @Andrewhedgehogs
    @Andrewhedgehogs 3 ปีที่แล้ว +6

    Soil walls seem pretty effective to lower noise pollution from motorway 🛣.

  • @coastaku1954
    @coastaku1954 3 ปีที่แล้ว

    My middle school was about 1km south of the QEW, a highway that has a noise barrier at that section, yet I could still hear the loud drone from it, clear as day

  • @varsityathlete9927
    @varsityathlete9927 3 ปีที่แล้ว +14

    interesting, i always thought it was the engine noise, and as electric cars become more common the noise level will just drop.

    • @infidellic
      @infidellic 3 ปีที่แล้ว +1

      I think that's what I thought when I was younger, then I've had to replace tyres/tires at the side of a motorway/freeway twice since and rapidly learned that the sound is completely wrong and it's clearly mostly tyres.

    • @CleverAccountName303
      @CleverAccountName303 3 ปีที่แล้ว +8

      It will make it quieter because instead of having engine noise and tire noise, electric cars have only tire noise. Low speed areas such a city centers and intersections will be much quieter, but the difference on the highways will not be noticeable because tires are so loud.

    • @Squaretable22
      @Squaretable22 3 ปีที่แล้ว +4

      i think about 40MPH/70KPH is where it crosses over, before that its mostly engine, after its mostly tire/tyre. Freeways are all tyre, while City Streets are mostly car engines.

    • @varsityathlete9927
      @varsityathlete9927 3 ปีที่แล้ว +2

      @@Squaretable22 that makes sense, electric cars are quiet when they drive past, but its always at slower in city speeds.

    • @brianleeper5737
      @brianleeper5737 3 ปีที่แล้ว +1

      Where I live it's usually exhaust noise because the first thing a nephson does when he gets a truck or motorcycle is to straight-pipe it.

  • @lachlansmart2373
    @lachlansmart2373 3 ปีที่แล้ว +1

    I live in Brisbane, QLD, Australia. I have driven extensively around the eastern mainland between Bundaberg and Melbourne. The vast majority of all noise barriers that I have seen are metal uprights (Stainless steel I might guess) with treated timber slats horizontally between them. Often, there will also be a row of trees on either or both side/s of the barrier as well.

  • @FinancialShinanigan
    @FinancialShinanigan 3 ปีที่แล้ว +4

    This is why we need underground tunnels and more open space for people and nature

  • @TriAngles3D
    @TriAngles3D 3 ปีที่แล้ว +1

    Many North Western Europe highways do not have barriers that are perpendicular to the road but instead set at an angle. Also, many are made of more absorbent materials. I would assume that concrete is highly reflective and that the height of the barrier should not be a multiple of the dominant low frequency sound wavelength that tires produce. In particular, these low frequency signals can bend around corners. While they are self-canceling in certain regions they also become amplified in other regions when they collide such as described in the video.

  • @mkviis
    @mkviis 3 ปีที่แล้ว +3

    Tunnels and tall walls are amazing, when I go through one with my four cylinder car, it sounds like a screaming v6 😂

  • @ernestbywater411
    @ernestbywater411 3 ปีที่แล้ว +1

    The most effective noise barriers ever provided are earth and trees. Not only do they properly break up the sound they absorb a lot of it, and they last a hell of a lot longer than concrete while also being much more environmentally friendly. Even if all they do is plant native shrubs along the verges of the highways they'll find they'll have a decent reduction in road noise.

  • @doujinflip
    @doujinflip 3 ปีที่แล้ว +6

    I noticed in Japan their noise walls are curve into the road at the top, which might help lengthen the deep sound shadow behind the wall

  • @SCIFIguy64
    @SCIFIguy64 3 ปีที่แล้ว +2

    I lived about a mile from the interstate. 8/12 months, you couldn't hear anything because the wood was so dense. But in the winter, when the leaves fell, you could hear vehicles far away. It wasn't loud, but it was noticeable late at night. It's kind of odd, being almost on farmland, and hearing a truck engine brake before an exit on a snowy night.

  • @hughfergusson9544
    @hughfergusson9544 3 ปีที่แล้ว +6

    We just need to start reducing our highway needs.

    • @Boxhead42
      @Boxhead42 3 ปีที่แล้ว

      What a very simple solution to an incredibly complex problem. 🙄 Lol.
      If it was only that easy......

    • @Tadfafty
      @Tadfafty 3 ปีที่แล้ว

      United States of America, doing that?

  • @somitomi
    @somitomi 3 ปีที่แล้ว +1

    I have never in my life seen a sound barrier made of bare concrete. Sound barriers here are usually covered with cement-bonded wood chippings creating a porous surface. They're usually pressed into a corrugated shape to further diffuse and absorb sound. Sound absorbing panels made of wood and glass wool are also common along motorways.

  • @alexanderosullivan9764
    @alexanderosullivan9764 3 ปีที่แล้ว +5

    Wait until you hear that these barriers can bend over the road like in Asia! Then they might work better

  • @paulsehstedt6275
    @paulsehstedt6275 3 ปีที่แล้ว +1

    The barriers must be curved on the upper quarter or lean in the direction of the noise source to reflect the road noise back to the traffic. Wooden crash barriers are also helpful for noise reduction.

  • @brokengoose
    @brokengoose 3 ปีที่แล้ว +5

    As with most Cheddar videos, bumping the speed to 1.25 helps with. The. Slow. Narration. Speed.

  • @Edhilues
    @Edhilues 3 ปีที่แล้ว +2

    In Korea, some of those walls are 5~8m tall and are covered with vines, it will clearly have more efficiency to reduce noise and look better.

    • @buddy1155
      @buddy1155 3 ปีที่แล้ว

      @Lee Corin Maybe in South Korea, in the north Korea, no vines but barbwire.

  • @joshuagabsart
    @joshuagabsart 3 ปีที่แล้ว +12

    I’ve always thought they were there to annoy the passengers views of the scenery, but I later learned it was for lessening noise pollution.

  • @samwalko
    @samwalko 3 ปีที่แล้ว +1

    I live near the end of a cul-de-sac, and then there's a wall then the 8-lane interstate. However, the interstate is also in a bit of a valley, which seems to help direct the sound up rather than just over the wall. Inside with windows closed, it's quieter than a desk fan, honestly. Outside or with windows open, it's still much quieter than a conversation.

    • @wownewstome6123
      @wownewstome6123 3 ปีที่แล้ว

      Yeah, sunken freeways sound like the way to go! I lived and shopped near one and it was fairly quiet, despite having a lot of fast, thick traffic, including many otherwise loud trucks/semis.

  • @leszz
    @leszz 3 ปีที่แล้ว +5

    I thought it was so cars wouldn’t go crashing into houses, stores, etc when there were to be a accident or something

  • @Jalmaan
    @Jalmaan 3 ปีที่แล้ว

    A good way to still get good use out of those concrete barriers is to plant (deciduous) trees next to them. The leafs and branches will dampen the noise by quite a bit.

  • @robertkent4929
    @robertkent4929 3 ปีที่แล้ว +5

    Physics pretty much disproves their use.
    My acoustics I professor in college suggested planting trees and installing a fountain in your back yard.
    Your ears acclimate to the sound and if your eyes see something else that makes constant noise (like said fountain) you can trick your ears into believing the sound is coming from that

    • @frankhusel5033
      @frankhusel5033 3 ปีที่แล้ว

      I doubt that this really helps. I remember working and living places that had such fountains. It wasn't relaxing at all, but downright nerve-racking. Much too loud when the sound is trapped between the walls.
      Believe me, it won't work.

  • @muzzthegreat
    @muzzthegreat 3 ปีที่แล้ว +2

    The choice of concrete is surprising - it's much more expensive than pressure-treated plywood, or pine boards - hmmm, maybe the concern is vandals burning it?
    Here in Queensland the wood is often in panels that are separated by steel - usually a universal-column - a fire wouldn't propagate very fast.
    The wood is often green [copper napthanate] so the wall 'disappears' behind a few shrubs - and the Main-Roads-department is obsessed about planting shrubs - every shrub you plant eliminates another bit of grass to mow - and if someone crashes off the road shrubs will slow them down before they hit something hard.

    • @trivmtran
      @trivmtran 3 ปีที่แล้ว

      It's maintenance cost. Concrete doesn't need to be replaced as often as plywood.

  • @LFTRnow
    @LFTRnow 3 ปีที่แล้ว +5

    Car tire noise from roads and (and freeway) noise is not much of an issue. It comes out as a hiss sound. However, the #$!@! that insist on making their vehicles' engines as loud as possible and then relish in making that noise - THOSE are a pain, and there are way too many of them. On-ramps are bad, as are intersections for this. Used to be thumping stereos, now it's roaring engines.

    • @emmamemma4162
      @emmamemma4162 3 ปีที่แล้ว

      In Europe this is illegal (at least in some places). Best law ever!

  • @yutgoyun
    @yutgoyun 3 ปีที่แล้ว

    I just sold my condo where I’m right next to a freeway. So glad to be moving. I can verify many of the effects described in this video.

  • @РусланШкуренко-ц6у
    @РусланШкуренко-ц6у 3 ปีที่แล้ว +3

    What's with audio?

  • @subman721
    @subman721 3 ปีที่แล้ว +1

    My House is backed up to I-5 in South Orange County, CA When we moved in in 1989 there was a 6' wall between us and the freeway! in 1995 Caltrans decided to erect a 16' sound wall. Ever since the sound has been much LOUDER!!! As the walls on both sides of the freeway have turned the freeway area into a virtual canyon. Soundwaves bounce back and forth off the walls getting louder, and when they reach the top it is just GOD AWFUL!!! The sound is much louder in colder weather too.

    • @meandub
      @meandub 2 ปีที่แล้ว

      I-5 in Norwalk here. Found this video because I’ve about had it with an 80-90hz humming coming from the freeway this year. 4:40am and I’ve been up all night pretty much for 2 weeks pulling my hair out.

  • @darkless60
    @darkless60 3 ปีที่แล้ว +4

    5 mins video in 4 words: concrete hard reflect sound

    • @schnutzudri918
      @schnutzudri918 3 ปีที่แล้ว

      ...if they are built the wrong way. As they do in the US. Not sursurprising at all.

  • @garcjr
    @garcjr 3 ปีที่แล้ว

    The porous asphalt used in Arizona is called asphalt-concrete open graded friction course or rubberized asphalt. It's actually a pretty quiet pavement for the first five years. Then it's not so quiet. Diamond cut concrete seems to be a longer solution but not as quiet.

  • @DaxxterDreams
    @DaxxterDreams 3 ปีที่แล้ว +4

    Plant plants on them. It is cheap, looks good and reduces sound a lot

    • @MilwaukeeWoman
      @MilwaukeeWoman 3 ปีที่แล้ว

      The plants make the very expensive walls deteriorate faster. Concrete construction is polluting. This is a very bad idea.

    • @vikingstrong5772
      @vikingstrong5772 3 ปีที่แล้ว

      This doesn't work.

  • @iMadrid11
    @iMadrid11 3 ปีที่แล้ว +1

    A better solution would be to install soundproofing and insulation to your home. Thick double pane glass windows, in between walls and roofing insulation.

  • @seasong7655
    @seasong7655 3 ปีที่แล้ว +8

    The solution is to completely enclose the highway or build it underground

    • @London755
      @London755 3 ปีที่แล้ว +7

      Or, hear me out here, not build the highway. Most new highways serve little purpose other than to facilitate more suburban sprawl.

    • @seasong7655
      @seasong7655 3 ปีที่แล้ว +2

      @@London755 true but the ones, that are already built need to be removed as well

    • @JaneDoe-dg1gv
      @JaneDoe-dg1gv 3 ปีที่แล้ว +1

      Solution. Switch to railroads.

    • @PAYTONLB999
      @PAYTONLB999 3 ปีที่แล้ว

      @@London755 suburban sprawl exists because suburbs are safer and more desirable than cities... and because people keep wanting to move further from the city

  • @strawberryjam3670
    @strawberryjam3670 3 ปีที่แล้ว +1

    In germany, we either have them in a special diffused shape, or we use dirt mounds overgrown with grass and local plants.

  • @jarynn8156
    @jarynn8156 3 ปีที่แล้ว +4

    Awful audio quality, not very informative... Feels like the channel has been letting its quality control slip lately. Still some good stuff, but quite a few wastes of time too.

  • @N911GT2
    @N911GT2 3 ปีที่แล้ว +1

    In the Netherlands we have very silent asfalt on our highways. It’s called ZOAB and ik really makes a difference. Also we typically grow plants on our barriers that helps a lot too.

    • @ex0stasis72
      @ex0stasis72 3 ปีที่แล้ว

      That’s so interesting! Now I want to see a video about that from Not Just Bikes. That sounds like it’s right up his alley for what his channel is about.

  • @blusterlumino890
    @blusterlumino890 3 ปีที่แล้ว +6

    when you live in a condo and your condo is the noise barrier for the housing area behind

  • @evenakushita
    @evenakushita 3 ปีที่แล้ว +1

    Well, solid concrete without any insulating foam will not be good in absorbing noise
    So, why not add extra layer of stone foam or any similar material, it will be quite easy to apply

  • @lucasmatson
    @lucasmatson 3 ปีที่แล้ว +8

    please buy a better microphone, your videos are so well edited but the audio really makes them a lot worse

    • @FGH9G
      @FGH9G 3 ปีที่แล้ว +1

      Agreed, combined with the sub-par sound mixing at times, the narration can often times be unintelligible.

    • @frostburnspirit9065
      @frostburnspirit9065 3 ปีที่แล้ว +1

      There's something wrong with the audio in this specific video and I don't know what it is, but it's so bad I can't watch it. All other videos are fine, what are you talking about?

    • @lucasmatson
      @lucasmatson 3 ปีที่แล้ว +1

      @@frostburnspirit9065 i think its just bad mixing but ive noticed the quality isnt really good in some videos. id imagine shes recording from home and doesnt have access to cheddar's recording equipment

  • @jeremyandhannah2235
    @jeremyandhannah2235 3 ปีที่แล้ว

    Makes sense. I grew up in SOCAL next to a major freeway, there was always that constant white noise, but when I visited a friends house who’s backyard was up against the 20’ tall freeway wall, It was noticeably more quiet than my house which was about 6-7 houses away from the freeway.

  • @Snuzzled
    @Snuzzled 3 ปีที่แล้ว +3

    I thought those walls were for safety, to help reduce cars from careening off highways accidentally, as well as preventing pedestrians from wandering onto highways.

  • @richinoregon
    @richinoregon 3 ปีที่แล้ว

    The atmospheric condition which defeats sound barriers is called an inversion, where the temperature rises with height-cool clear nights are ideal for inversions. I live about a mile from the freeway and generally can't hear the noise, but when there is an inversion I can hear the highway noise very clearly. In fact, I can hear trains five miles away easily.

  • @nunya___
    @nunya___ 3 ปีที่แล้ว +4

    @5:08 "Concrete walls have to be replaced every 30 years or so."
    Really, you seriously think that? LMAO

    • @cubiusblockus3973
      @cubiusblockus3973 3 ปีที่แล้ว +1

      The buried pillars that hold up the wall degrade due to moisture and concrete cancer, if they are not replaced, the wall has a risk of collapse.

    • @Salattrainer
      @Salattrainer 3 ปีที่แล้ว +2

      In Germany a women died because a concrete wall fell on her car.

    • @nunya___
      @nunya___ 3 ปีที่แล้ว

      @@cubiusblockus3973 Being that I'm well versed in building construction but not this construction in particular, I say that _that's_ only due to poor construction standards/materials. Concrete rot and metal degradation are due to poor maintenance and material selection. Properly protected steel such as galvanized steels of adequate gauge would not fail in 60 years or more. Concrete walls, with regularly applied sealant (5 to 10 years per application), would last indefinitely given that all concrete will soften with age but very capable of hundreds of years of service.
      I'm very much in favor of natural berms and trees but in tight urban areas it can't be _the_ solution.
      Concrete can be protected by natural oils and with thin wood (that's vegetation bearing) if preferred. Also, angling the roadside surface by 30 degrees or more can deflect and disrupt(mute) sound upward and away from people.

    • @nunya___
      @nunya___ 3 ปีที่แล้ว

      @@Salattrainer That's bad engineering Germany. There is a great example of a wall that didn't fall without great effort...trying to remember where that was....

  • @ex0stasis72
    @ex0stasis72 3 ปีที่แล้ว

    I live almost 2 miles away from a freeway with a noise barrier and I still hear a faint roar 24/7. I never really noticed until I visited someone else’s house 45 minutes’ drive away from the city. It was so quiet, I could hear my ears ringing because I wasn’t used to it.

  • @finn2828
    @finn2828 3 ปีที่แล้ว +10

    Or maybe we could just use less cars in general

    • @iniciusv1
      @iniciusv1 3 ปีที่แล้ว

      tons of money to buy cars, to build infrastructure for them, to fix the problems they generate and it still doesn't work well

  • @jedith123456789
    @jedith123456789 3 ปีที่แล้ว +1

    I wonder if we'd be able to fill the barriers with recyclables that don't break down easily, like plastics, to be used as a filler. The junk is put to good use and it makes the walls cheaper.

  • @Fernando-ek8jp
    @Fernando-ek8jp 3 ปีที่แล้ว +3

    Depending on the distance you can have x decibels at 15 ft.
    Nobody else see a problem here 😂?

    • @bcubed72
      @bcubed72 3 ปีที่แล้ว +1

      No, I don't.
      For purposes of standardization you measure "how noisy a thing is" at a fixed distance. Otherwise, you can play games with how far away you are to hide data: measure a rocket launch at 500mi, and it's pretty quiet.

  • @CharliMorganMusic
    @CharliMorganMusic 3 ปีที่แล้ว

    I like channels like Cheddar.

  • @andyc9902
    @andyc9902 3 ปีที่แล้ว +3

    Just add Stryofoam on the walls

  • @cityplanner3063
    @cityplanner3063 3 ปีที่แล้ว +1

    Noise barriers are effective if the materials use absorb the sound. Build it just out of concrete will reflect the sound. We learn this in first year city planning.

  • @overlisted
    @overlisted 3 ปีที่แล้ว +6

    just don't build houses around big roads lolololol

    • @mohammedsarker5756
      @mohammedsarker5756 3 ปีที่แล้ว +2

      or build less highways and more mass transit

    • @adambennett805
      @adambennett805 3 ปีที่แล้ว

      Problem is those houses were built before the roads or traffic

    • @overlisted
      @overlisted 3 ปีที่แล้ว +1

      @@mohammedsarker5756 that won't happen in america

    • @zoanth4
      @zoanth4 3 ปีที่แล้ว +1

      Most houses around major roads and highways were there long before. Immenent domain and all that

    • @zoanth4
      @zoanth4 3 ปีที่แล้ว

      @@mohammedsarker5756 we don't want that in america. Only the rich snobby urban liberals want it because living in stuffy metro areas without a car is their choice.. We prefer our freedom of movement in our vast nation as a collective. You'll be hard pressed to find any middle class people in america that prefer the restrictions of public transportation over cars. We also prefer lower tax rates.
      We hate even our best public transportation systems. The mta here in NYC is corrupt, expensive, dangerous, and always late.
      -nyc guy who's lived all over the country

  • @fauzirahman3285
    @fauzirahman3285 3 ปีที่แล้ว +1

    Where I was growing up they would plant a whole row of tall pine like trees and I think they do a better job of absorbing and diffusing the noise. Also I think they would absorb some (but only some) of the smokes and fumes as opposed to a concrete barrier.

  • @orphidian11
    @orphidian11 3 ปีที่แล้ว +2

    it might just be me, but I felt that the demonstration in 3:22 wasn't that effective in conveying the concept

  • @AndrooUK
    @AndrooUK 3 ปีที่แล้ว

    Sound (and even light in certain cases) can and does bend around barriers and other physical objects, so even a noise barrier could end up bending blocked sound waves towards the houses it's supposed to protect from noise.

  • @eduarddvorecky3731
    @eduarddvorecky3731 3 ปีที่แล้ว

    Here we use porous concrete lining turned towards the road (could be normal concrete on the outside) and top of barier is curved or bent towards the road. Those porous bariers absorb the sounds and curved/bent part creates better shielding. Plants like vines that are able to grow up the wall can be used too to make it look and function better. It's better than trees because it needs maintanence only as often as repainting the lines or fixing rails so it won't cause too many delays in use.

  • @nicolasroland8533
    @nicolasroland8533 3 ปีที่แล้ว +1

    The video failed to show a mechanism or data demonstrating that the noise barriers makes sound worse. (Except one testimonial)