Also like to see cheaper rental units making use of could Solutions Like these him come. The Natural World can also inspire effective solutions. I hear 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. Our flies of our world has gotten too loud, but what can we do about it . On that quote. So the christian plot could be described as a noise, whisper. He and his colleague on the rate wont to freeze cities from noise. They work on behalf of local authorities and property developers. Dunker for thanks, thats now calibrated to p level. Lets 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, leaving here his stressful alarm. Article of the bar 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 all the window shut. It is of the sound pin shades 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 it landed 5th body and 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 tribe. I want to make their situation more bearable and also get that message across to policy makers in a way that understand. So come on, its here. After all, leticia hold the purse strings. The critics 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. Um and is just 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. Ok. The noise reverberates between 2 apartment blocks enter 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, or the quiet side logins either sound insulation and new apartments. Here, noise prevention could deliver to benefits at once christian pop is called in as a consultant to advise on similar problems elsewhere in zurich. For example, here, cargo trans rumble directly past times. How can these, the palm of blocks be protected from rail noise . Flats loud it will. Yeah. Very loud. Hello. Under espo assad is an internationally recognized acoustics expert from siri. Hes us christian pot for some help. Now theyre joining forces to fight the noise. Zurich is a key transport up. 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 1st 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 st. Almost within touching distance. Hm. Listen to how these low frequencies coming from this monster so close by, dominate the scene like a sy fy movie stay in the past a f, as in. Yes, it goes a 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 the minute. Every minute is a 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 leslie. Lighter sound, the more intrusive its going to be more so at night when youre sleeping, then during the day building modifications may help you to but what about the trains themselves . As it was, had a credit of up to one. I must take a closer look at the source. Yeah. And there are many options there. The wheel track noise, for example, can really important as a nurse. 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 out and quieter trains are already a reality. Oh and up in it, things are changing too. When planes take off, the moon is deafening. But when an olive sauce silence, what are the ill fly so slowly and quietly that his prey had taken completely by surprise. I was as a yandell in his colleague michel a here, want to know why otto is able to fly so quietly the to work at the gym and Aerospace Center in branch like theyre involved in a project to make planes quieter. And new inspiration comes from nature running in hunter i from unseen a lot of holes. Marcan. Im 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 an air here when he lets his feathers hang down like this on it. We can make out a front edge structure with tiny little teeth. Thats wouldnt 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 researches 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 wing. Previous experiments with the survey should edge like this, produced a similar effect. Hell evacuate kennedy that were familiar with the serrated 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 any count what his foolish 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, or in other words, weve significantly reduced this sound source. You can see it very clearly. The brush itself has been very effective for some reason. The brush on the wing h reduce to sound by 3rd research breakthroughs, light is brought to life in the hanger at the Aerospace Center together with his team. Professor delves is found way to apply the soft trailing edge principal to the landing flap of a plane wing. Yet some via the land doing this vice. Now weve learned that 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 blessing natalie 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 corners, an edges the research is 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 sean, an inch medical issue, a plane taking off without moores reduction. And in comparison, assimilated takeoff with all the juice measures class a plans are possible. Ah, cargo trains are also extremely lamp. The noise is making people in the middle right. Dolly sick. Why can schmidts nice on his wife brita . A sound proofing their house . It again is shown explain here. 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 know, its really unpleasant. They said sit, were not gonna wish 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. Your voice boy part in the middle rhine 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, full 100 train speeds 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 National Railway Company deutsche a bon high speed passenger trains run on the same tracks as the cargo trains. And freight volumes is set to increase its slope so called Wister Brighton provide some relief over the past 2 decades deutscher bond has invested 220000000 euros in the retrofit. Thanks to the whisper break the running surfaces of the well stay smooth before they 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 from the train. Well the future with laces and computers using data from the actual will. Research is designed digital models, simulations of new quiet reales 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 speak of it 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. Were 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. And what if you press coach on it . Thats it is certainly better but not as robust us did. Yes, there are a few other constraints, but sure a spoke will would be better than a full surface deflection. Opens it, im sure youll get that 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. But already there are effective ways to further reduce rail noise. The whisper break has been the standard for years in switzerland. But for some people here, that doesnt go far enough 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 the plenty of them the viking, how does that work . And if you left breaking the carriages with the latest innovation. Avelo nick, weve got a set of wheels, but with an access it has to disc brakes. Honda there and the carriage breaks on these desk with the brake pads need the the blanks beleaguered. 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 discs, this is jennifer 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 disparate 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. Hope from the e. U is needed to ensure all Railway Companies get on board. No metre, i ne, here will be. This is only going to benefit the railway if we have a european solution, i love it. Otherwise itll just be nice and small scale, not a europe wide solution. And thats a shame that this child disgrace, the quietest solution, fitted a. That is, until the eventual development of the even quieter spoke. Well come by the button behind us. Staples nice caused 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 icon and that didnt work function yet. 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 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 as grandma gloved for the tunes enters experiment with whats known as active Noise Cancellation guns and was simply explained. We cancelling out noise with counter noise. Imagine it is 2 waves in the ocean hitting each other, not at that precise point where they meet a particular frequencies. Its quiet until theyre noise cancelling system aimed to protect construction workers from noise without headphones on of a baby usually cries, now her 3rd. Exactly. And all the um, irish spray large critical to loudspeakers in each of the chambers. Several microphones here on the surface behind the grid at her and on the reverse. And weve got the processing unit which calculates the noise reduction signal in milli seconds. The unhealthy noise is altered less industry in essentially way creating a quiet zone around here where the drivers left and righty 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. Often 8 hours a day that the ears take a real beating on our evening. Youre toast hall plots. Its time to try out the device at a testing site for construction machinery. Instruct that im run most reduction without head fights, which are practical on construction sites. Wearing too often can result in ear infections. Machine operator micro stake miller 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. What did some nice big holes and use the bucket a bit. Ok. Well do the 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 at 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 on. You can still hear a bit of background noise, but this invasive droning thats gone. The sim significantly quieter. Ah, well, on money you can hear the difference. That muffled droning. Yes. That humming . Thats exactly what were trying for. The low frequencies under 500 hertz, a canceled out because this Machine Works at very low frequencies. The spherical radius is especially large, 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 with or without the device. With the device you can leave it installed. Great, thank you very much. Take care. She really in the 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 year, the 2 entrepreneurs plan to sell their 1st noise cancelling systems at 4000. 00 euro a pace. One is the best solution for reducing traffic. Noise has become a reality for christian pop, a residential moist barry at this major intersection in hamburg. Because its expert and his colleague oliver rick assist you glass wall. It closes off the corridor between the old and new buildings. The wall keeps noise out in the interior courtyard. Quiet that us these the special cameras to monitor how well it works to your model. Little one 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 gas 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. Of just closer the building on that street now protects this Old Buildings and these walls on create a tranquil in a courtyard. 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 streets, and cant afford a house in the country. Thats one of christian pops main goals. So lancaster hasnt, i cares a lot with 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. This chance. Id also like to see cheaper rental units making use of good Solutions Like these are, wouldnt rosamond out for medical more piece at last. Something many people are looking for. Then to make it happen there a whole host of innovative ideas. We can make the world a quieter place. Ah ah ah ah, with your shift your guide to life in the digital world. Explore the latest online trends. Navigate your way through the digital jungle. Get a global perspective. Well be your guide and show you whats part. You decide what really matters to you. Shift coming up on d w, or how do young people become terrorists unnoticed by hiding only internet, where students become radicalized in plain attacks, filmmakers infiltrate, chat rooms, and online forums to uncover esteem that turns the children into murderers. Like hate kill in 15 minutes on d. W. Sometimes a seed is all you need to allow big ideas to grow. Were bringing Environmental Conservation to life with learning packs like global ideas. We will show you how Climate Change and Environmental Conservation is taking shape around the world and how we can all make a difference. Knowledge grows through sharing, download it now for free. Love has no limits. No love, as for everybody. Love is life. I love matters. And thats my new podcast. Im evelyn sharma. And i really think we need to talk about all the topics that more survive and deny that this i have invited many deer and well, i guess. And i would like to invite you to an end table again. They get all the harvesters or immigrants, dolock. Its like, well, everything you enjoy eating at home with your family, was harvested by people who are being exploited. Its done decently and were going to need to, uh huh. We keep doing what were doing and why a green revolution is absolutely necessary. Europe revealed the future is being determined. Now. Our documentary series will show you how people, companies and countries are rethinking everything, and making major changes. Europe revealed this week on d. W. Ah, this is the w news, and these are top stories. Russian president Vladimir Putin has urged civilians to leave the illegally. Alex city of harrison as ukrainian troops advance in the area. The statement is the latest
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