Id also like to see cheaper rental units making use of Good Solutions like pays. Mm hm. Come the Natural World can also inspire effective solutions. Im here guns, guns where we can really see here is that the entire bird is covered with down. And that also makes the system really quiet. Alkali, the, our world has gotten too loud. But what can we do about it . With that and that quad christian pop could be described as noise, whisper he and his colleague oliver reed wont to freeze cities from noise. They work on behalf of local authorities and property developers. That dunker, thanks thats now calibrated to peak level. See, ah, street noise in hamburg is part of daily life. More than 70 decibels of the moon. On the main roads, tens of thousands of restaurants for exposed to excessive noise levels. Even hear a stressful delane article of the ball let the noise reverberates in the vacant building lots. That means you cant sleep with the window open. If you want to stay healthy here, you only do have to keep the window, shut it because of the sound penetrates. Deep between the rows of houses, noise is measured in decimals. The medical recommendations are a maximum of 65 decimals during the day, and 55 at night. Here its 71. Well beyond levels considered healthy this because noise makes this sick. Too much noise leads to insomnia, high Blood Pressure and cardiovascular disease. Acoustics, expert christian pop, wants to help reduce noise levels on main roads. But in lambert, but in as far as noise goes, yet in the case of people who have less money to go to live in places where ransom property prices are lower, these people are stuck and cant get out on miss. I want to make their situation more bearable and also get that message across to policy makers in a way that understand to come on. Its here. After all, sessions hold the purse strings. The tuesday, experts are also hoping to reduce the planet at this junction. Emerson will need to see if we can close this gap to quieten things down in the rear courtyard of the building under stress looking out on to the street, but just want to they would really benefit resident photo. Presumably the trees will have to go, but well managers, lets work out some castings. Yes. Okay. The moist reserve rights between 2 apartment blocks and into the re court yard for 30 years christian pop in his company, lamb contour have been developing solutions for quite a life. His idea then gone to the floor plan of the adjacent building allows for it. We can erect a structure in betraying that will also incorporate apartments one apartments, the face, the interior courtyard. The quiet side logins, either sound insulation and new apartments. Cheer noise prevention could deliver to benefits at once. Christian pop is called in as a consultant to advise on similar problems elsewhere in series. For example, here, cargo trains rumble directly past times. How can these palmer blocks be protected from rail noise floor . Thats loud that well i yeah, very loud. Under his boss. Odd is an internationally recognized acoustics expert from siri. Hes us christian for some help. Now theyre joining forces to fight the noise. Zurich is a key transport hub. Theres a lot of movement and lots of noise primarily in the Industrial Zone to the west of the city. Hello. Did you hear it as it . Sure did. It was loud enough from there to there and all the way up until his lost heart has been working for the count on a zurich for years. His job is to protect residents from rail noise and ill do it again. Oh. What i knew was surfaces. I see around here, those are surfaces to flash. They reflect, you can hear it. A cargo train is approaching soft and 2 passenger trains. Yeah, thats crazy. Other signs, almost within touching distance, whom listen to how these low frequencies coming from this monster so close by, dominate the scene like a sy fy movie stain of ash at the center. Yes, those are low frequencies that cant be absorbed anywhere they reverberate along. These was invented that have been returned from behind like a store from the side that from the noise on minute, every minute is the 17 meter train sides create waves of sound. Its like a wave puller mountains of noise coming through and building up again in this passage. I get even louder back there than they are hear loud noise is a registered, subjectively clarity, lighter sound, the more intrusive its going to be more so at night when youre sleeping during the day, building modifications may help you too. But what about the trains themselves . As it was alex relevant to him, i must take a closer look at the source yet. And there are many options there. The well track noise for example guns really important that as a nash. In other words, on the tracks i need to have wheels that are perfectly round tracks that are really smooth and drive systems that are well soundproofed. Theres potential that ive been quieter trains are already a reality. Oh and up in it, things are changing to when planes take off, the moon is deafening. But when an owl lifts sauce, silence, what are the ill fly so slowly and quietly that his prey had taken completely by surprise. I received a, yan dills and his colleague michelle a here want to know why otto is able to fly so quietly to work at the gemini Aerospace Center in branch like theyre involved in a project to make planes quieter. And new inspiration comes from nature running in hunter. Im seen a lot of holes marketing. I can hear guns got what we can see very well here is that the entire bird is covered with down loud. Its really, really soft all over of the sound under the wings as well. Went out and hes such a charmer, im from her. And then a he had when he lets his feathers hang down like this on it. We can make out a front edge structure with tiny little teeth that shouldnt be, thats something we aerodynamic engineers would call turbulence generators. It means we can fly extremely slowly and to prevent stall. And that also makes the system really quiet our lives feathers and down. The researchers are also particularly interested in the soft trailing edge of the als, when i sticking on a brush like Edge Research is try and softened the reassign of an airplane link. Previous experiments with the surrounded edge like this, produced a similar effect. Hell evacuate kennedy that were familiar with this. The rated Edge Solution must come. What more can we expect from the brush hoffman . Therefore, the advantage of the brush is that its actually directly aligned with the direction of flow, which more or less, eliminates the edge. In the wind tunnel is blown over the prepared edge. It 14 meters per 2nd. The microphones record the exact points where noise is created on the wing. The difference between the wing with and without the brushes calculated in the Monitoring Lab colors make the noise differential visible bread. His lout his in him and he come to what is phyllis on and i had to come, what were seeing here is the contour of the wing and on the rear edge, the source of the sound in the original where weve not yet applied a bra shotzel and now the difference when we apply the bratia, we should see a clear reduction, and indeed you see that everything that was read before has gone away a lot. In other words, weve significantly reduced this sound source. You can see it very clearly. The brush itself has been very effective at some good reason. The brush on the wing h reduce to sound by a 3rd Research Breakthroughs light is brought to life in the hanging of the Aerospace Center. Together with his team, professor dell is found way to apply the soft trailing edge principal to the landing flap of the plane wing. Yet sandia de land doing this vice. Now weve learned by softening the transition from trailing edge to free flow. We can reduce the sound in this instance, we havent used brushes, or other things. Weve implemented it with a material thats permeable to air flow. Multi are sort of sponge but made of metal that significantly reduces noise creation on this trailing edge. So as long as i found against, oddly enough, this modification alone reduces noise by 20 percent with the potential for much more across the entire plane. There are many coolies an edge is the researchers can target islam then via alamos. Now we think if we took all the measures together, wed reach between 4. 00 and 5. 00 decimals for the entire plane. I and thats a considerable amount as a shrine. Anesthetic ocean, a plane taking off without moores reduction. And in comparison, assimilated takeoff with always the juice measures class a plains ah possible. Ah, cargo trains are also extremely lamp. The noise is making people in the middle, ryan valley sick. Why can schmidts nice on his wife brita . A sound proofing their house . It again is shown extra india hello chair. Gail volume is really quite extreme here or mostly at night. When you get those ancient cargo trains going past that squeak and rumbles you, its really unpleasant. They said sit, were not gonna use light as ive had insomnia for years. When im lying awake in bed, all i can hear are the trains that we can sound proof as much as we like. It doesnt make any difference or your voice. Ball part in the middle, ryan valley lies on the north south axis between rotterdam and genoa. The picturesque middle ryan valley is the eye of the needle on this rail freight corridor. Every day, 400. 00 train speed from villages on both sides of the rhine residence the demanding of 50 kilometer per hour, speed limit, and night time, ban and quiet at freight trains nearly impossible targets for Germanys NationalRailway Company doors. Siobhan high speed, passenger trains run on the same tracks as the cargo trains and freight volumes is set to increase. It slope so called Wister Brighton provide some relief. Over the past 2 decades Deutscher Bank has invested 220000000 euros in the retrofit. Thanks to the whisper break the running surfaces of the wheel, stay smooth. Before that become rough with every break application. This means that the wheel and the track, the question Train Research is in switzerland are already step ahead and developing innovations beyond the whisper break. Here research is being carried out on the train. Well the future with laces and computers using data from the actual will. Research is designed digital models, simulations at new quiet wheels created on a computer. A christys expert christian pop is a frequent guest here. The project to develop a new super train will is happening at a swiss lab known as emp. Located music does the jaws it looks like a loud speaker that moves. And thats essentially what it is. What you starting with. We want to make models of the wheel vibrations that are as precise as possible. Whats a base of up to now further development tended to follow the trial and error principle. And it was really time consuming on the basis of our models. We are aiming for precisely targeted optimization to, to market the advantage of this purely virtual method. It helps researchers save time and money in their quest to invent the quiet train wheel of the future. Less you can only measure what already exists. And we want to develop something that doesnt exist yet at the vibrating. Now. Thats a disc, is it . Yes versus and what have you, per spokes on it . Thats it is certainly better but not as robust. Thats difficult. Yes. There are a few other constraints, but sure a spoke will would be better than a full surface deflection away from that yet. Im sure youll get them and well be back in 2 years with pleasure. Before a spoke, twill makes its way to the track this much want to be done quite already. There are effective ways to further reduce rail noise. The whisper break has been the standard for years in switzerland. That for some people here that doesnt have to harness at this factory site, just over the board room, the northern italian town of boost alicio. Thousands of well set a service repaired and stored. Here work is underway to further improve the interplay of wheel and brake solution. Disc brakes for freight trains. Director leonardo for go explains different toyota device. How does that work . Can it be left, breaking the carriages with the latest innovation . Ah, well, now weve got a set of wheels, but with an access it has to disc brakes on the bed and the carriage breaks on these desks with the brake pads need the. The blanch vilegas the described wheel is currently the best and above all the quietest available on the market. This is because the wheel isnt brake on the trade by a brake block, but on the extra disks is gentler on the wheels, keeping them smooth. With disk breaks, noise is reduced by another 30 to 40 percent compared with the so called whisper break. The following simulation shows the audible difference between whisper and described the noise reduction is clear. Refitting cargo trains yet again. This time changing with the brakes to describe would be the best solution right now, but its expensive help from the e. U is needed to ensure all rally Companies Get on board, nor meter i. Ne, here will be, this is only going to benefit the railway if we have a european solution by law. Otherwise itll just be nice and small scale, not a europe wide solution. And thats a shame that this charlotte disgrace, the quietest solution for today. That is until the eventual development of the even quieter spoked. Well come by the button behind the simplest nice cause to hamburg students to come up with a completely different approach to reducing noise is up a lift above the fish market and it was always loud. Come to british, i grew up in a village and i just wanted to sleep the windows open and that didnt work for me at the fish market. Got on my nerves every sunday. While at hamburg technical university, the 2 worked on further developing a system to reduce noise and founded a starter full years ago. Ah, fuck from elling is an electrical engineer. He wants to make construction vehicles quieter for the people who work in them. His partner is c, e o. Lucas hinkle asked, our mark loved the to inventors experiment with whats known as active Noise Cancellation guns antlers simply explained. We cancelling out noise with counter noise of imagined. It is 2 waves in the ocean hitting each other, not at that precise point where they made a particular frequencies. Its quiet until were or their noise cancelling system and to protect construction workers from noise without headphones on of a baby usually cries, now have the exact lake and all the um, irish spy, large critical to loudspeakers in each of the chambers. Several microphones here on the surface behind the grid, other and on the reverse and weve got the processing unit which calculates the noise reduction signal blizzard in milli seconds. The unhealthy noise is altered less industry. And essentially were creating a quiet zone around here where the drivers left and right is are, and within this quiet zone were able to reduce low frequencies. And since a little see on the system, aims to reduce noise by 50 percent which could make his life easier. Michael shipment operates this kind of machinery after 8 hours a day that the ears take a real beating on our evening, your toast hall plots. Its time to try out the device at a testing site for construction machinery, instruct at a mine most reduction without head fights, which are practical on construction sites. Wearing them too often can result in ear infections. Machine operator, marco stigma, is going to test the prototype under normal conditions on on and then i just like you to go for it. Just do what you always do was like some nice big holes and use the bucket a bit. Ok. Well do about super of you go have fun. Can the pounding rule produced by this 25 ton machine really be canceled out . The answer at the push of a button at the moment, this is also the shot. So its switched off at the moment. You can hear the muffled droning of the engine. I saw that as soon as you switch it on. Thats why the droning has gone, gone, gone. You can still hear a bit of background noise, but this invasive droning thats gone. The sin significantly quieter. Ah, well, on monday you can hear the difference. That muffled droning. Yes. That humming . Thats exactly what were trying for. The low frequencies under 500 heads i canceled out because this Machine Works at very low frequencies. The spherical radius is especially large at 30 centimeters. That means if you lean forward slightly, you should still feel in effect if you lean this far forward, you wont be able to hear it any more. If you lean back again, youll notice how the frequencies gradually fall away on better we the without the device with the device you can leave it installed. Great and thank you very much. Take care julian that weve been able to help the driver like thats not, thats exactly what were aiming for. Genuine feedback from the people who be using the device. The test was the success. Next you the to entrepreneurs plan to sell their 1st noise cancelling systems at 4000. 00 euro apiece. One is the best solution for reducing traffic. Noise has become a reality for christian pop, a residential moist berry at this major intersection in hamburg. V tuesdays expert and his colleague oliver rick assist glass wall. He closes off the corner door between the old and new buildings. The wall keeps noise out in the interior courtyard. Quiet. Are these the special cameras to monitor how well it works to your michael little from all of them are coming up. Lets see if we can capture it with the camera. Oh yes, we can hear it, especially when cars drive past. The acoustic camera makes sound visible. Its used to test whether the wall is properly sealed. Yellow and purple spots signal gaps in the sound barrier. The wall largely does its job with a few weeks spots. It chills the courtyard from noise coming from both main roads. Here were where this structure now stands on this side that used to be the street with sidewalk parks and such. The older building was unprotected, loftiest parser, the building on that street now protects this Old Buildings and these walls on create a tranquil in a courtyard off. And so the noise barrier has also created living space. 62 tenants have moved in kitchens and bathrooms faced. The road with living rooms, bedrooms at the rear a quiet time, even for those who live on land, city street, and cant afford a house in the country. Thats when a christian pops main goals. So long as hasnt i cares or loathe traffic as loud as were experiencing it currently along as in depth. While we do have Good Solutions here on these are privately funded and not cheap discounts, but id also like to se