noise

Ships have been damaging the oceans with noise for centuries. Germany is working on silent propellers to solve it

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Every time a boat crosses the seas, it is accompanied by a continuous noise underwater: that of the propellers that propel it. The noise problem of propellers in marine ecosystems is identified academically since 2004, but its reason for being is even older: the first time they analyzed its cause It was in 1893. What there is no solution to that disturbing low-frequency sound that spreads for kilometers, disturbing fish, cetaceans and other marine living beings. And its reason for being is even older: the first time cavitation was analyzed was in 1893. A team from the Kiel University of Applied Sciences has set out to remedy it with its project MinKav. Brief notes on cavitation. To understand the problem, we must first see what happens to the blades of a propeller when they rotate at high speed. With their movement, the blades generate a pressure difference between their faces. Thus, on the back side the pressure drops so much that the water changes state, going from liquid to gas. More specifically, thousands of small vapor bubbles. The problem is when these bubbles leave that low pressure zone: they then implode violently, returning to the liquid state, which causes pressure waves that are transmitted at high speed through the water. If the waves collide with a surface, they can deteriorate it considerably. The phenomenon of cavitation is accompanied by vibration and noise, as if it were gravel falling on a machine. This sound is broadband, with low frequency components capable of traveling long distances. Why is it important. Of all possible aquatic pollution, human-caused acoustics are the least mainstream, but their effects are documented. A couple of concrete examples of the importance of sound for aquatic species: whales They use sound to communicate, orient themselves and huntthe fish for such essential tasks how to detect predators or spawning and crustaceans are sensitive to vibration in the background. To get an idea of ​​the magnitude of the problem, according to the International Chamber of Navigation There are approximately 50,000 merchant ships operating continuously around the planet and they all emit that sound. It is not something specific. And the research team adds a twist: a propeller with less cavitation is not only less noisy, it can also potentially be more efficient (cavitation is wasted mechanical energy). Less noise and fewer emissions. The discovery. The HAW Kiel team has identified when the problem originates: the sound peak does not occur when the bubble forms, but right at the end of the collapse. And its intensity depends directly on the speed at which this collapse occurs. The faster you go, the stronger the blow. Illustration of human, marine animal and environmental sound sources in the marine environment, with proportional sound waves. National Office of Oceanic and Atmospheric Administration How are they doing it. The experiments are being carried out at the Naval Hydrodynamics Laboratory of the German university, in a kind of aquarium with a miniature propeller, so that they can reproduce the flow conditions around the propeller. Equipped with underwater microphones and high-speed cameras, they have determined where and when that noise peak occurs. The next step is computer simulations to experiment with designing different propeller geometries to reduce noise without sacrificing performance, efficiency or durability. The most obvious solution, lowering the rpm, is not an option: a commercial boat cannot afford to go slower. Pending subjects. However, MinKav started in January of this year, will last three years and have a budget of 390,000 euros, modest for a problem of global scale. Even if MinKav were to come to fruition, it would have to go from the laboratory to scale-up on a commercial ship. In Xataka | A Spaniard has patented a mast that transforms wind and waves into electricity: his invention challenges diesel in boats In Xataka | A “roomba” to clean rivers: the ship that the Three Gorges Dam has launched in China Cover | Pexels

With the fashion of American kitchens, a refrigerator that makes noise can be torture when watching TV. How to choose well to avoid it

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How cool American kitchens are. You have, without walls, doors or partitions in between, the kitchen next to the living room and dining room. I love the concept itself, but there are two things that have always raised doubts in my mind. One is the smell, because imagine starting to do something that doesn’t smell good (like cooking cauliflower or making some fried fish, for example) and going to the couch to watch TV while you do it. And then there is the issue of noise. Of course, here you may think that it is the price to pay for having everything in the same space and you are right. If everything is together, you have to assume that, while you cook, you will have noise next to the TV. But the stove, the extractor or the oven are not the only things that make noise in a kitchen. What’s wrong with the refrigerator? This appliance makes noise and is not like the rest of the things in the kitchen: it is always working. For this reason, if you have an American kitchen, It is essential that you choose carefully which refrigerator you are going to place in it. Yes, it’s about looking at what decibels it emits, but there is something to it. I explain everything you need to know about the subject. Two or three dB more than necessary are enough to ruin your movie night A refrigerator is not as noisy as a washing machine when it starts spinning like crazy, but that doesn’t mean it doesn’t make sound. In houses or apartments with traditional kitchens, this is not a problem. I have been living in my apartment for more than 20 years and, since the kitchen is at one end, I barely know the noise my refrigerator makes. Things change if the kitchen is American. I put you in situation. Imagine that you are on the couch watching a movie with a blanket and popcorn. During shootings and explosions you will not hear anything other than the TV, but things change when there is dialogue or even nothing at all. There, if your refrigerator sounds more than necessary, you are going to hear a hum that is anything but pleasant. Okay, but how do I know how loud a refrigerator sounds? If you take a look at the technical data sheet of any refrigerator, you will find the sound it emits measured in decibels (or dB). It is obvious that the higher the dB number, the greater the noise it emits. What is not so obvious is that A difference of just 3 dB will make us perceive twice as much noise.. To put it bluntly: a refrigerator that emits 40 dB or more in a kitchenette can be really annoying when watching TV. The ideal is to search for this type of spaces a refrigerator that emits 39 dB or less. But of course, since two or three dB less is noticeable, the less the refrigerator emits, the better. The noise comes from the compressor, but not all are the same We have talked about the noise, but not its origin. The sound that refrigerators emit comes from their compressor, which is responsible for keeping your food and drinks very cool. And what does that matter to me for my American kitchen? The answer is very simple: depending on the type of compressor or motor, the type of noise is not the same. Refrigerators that are a few years old have a traditional motor or compressor. This, in summary, only has two modes: either it’s off or it’s on. If the refrigerator detects that the temperature inside is too high, it starts the compressor at full speed to cool down. This means that, when this happens (which often happens if you open the door too much, for example), we will hear a loud noise when starting, followed by a humming noise that will last until the compressor stops. That changes with Inverter motors. These are basically always on and they regulate their speed depending on the temperature. If you open the door and it gets a little cold, speed up a little. However, if your refrigerator has been closed for a long time, it will run very slowly, so the noise will be less. This way, the noise made by the refrigerator will be quieter most of the time. And of course, you get rid of the “noise” of the traditional compressor when starting up. If you are looking to save as much as possible, refrigerators with traditional compressors are cheaper. In price, because traditional compressors consume significantly more energy than inverter motors. However, I would only place one of these in a conventional kitchen and away from the living room or bedrooms. For an American kitchen, in 100% of cases, I would always recommend a refrigerator with an inverter motor. Not only because they tend to emit, on average, less noise. It is due to the fact that we are not going to hear them start suddenly, something that does happen (and very often) with those that have a conventional engine and that can be annoying if we have the refrigerator next to the TV. Therefore, with that clear, it is time to take a good look at the dB. The good and the bad of both options, face to face 36 dB or less between 37 and 39 dB THE GOOD 🟢 You won’t hear it even when the protagonists of your movie look at each other without speaking. They are cheaper and, at the same price, you get a refrigerator to store more food or drinks THE BAD 🔴 It is a more expensive option that may cause you to have to cut back on capacity or features You will hear a slight hum while watching TV that can take you out of the movie Ideal for: Do not hear any type of hum or vibration when watching TV Families who … Read more

They have some of the best noise cancellation out there.

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I don’t know about you, but for me it is vital to have good wireless headphones. When it comes to going to the gym, I prefer to use truly wireless onessince they are more compact and comfortable when exercising. Now, in terms of sound quality, autonomy, noise cancellation and comfort in long sessions, nothing is better than a headband. and just That is precisely where the Sony WH-1000XM6: They are one of the best options on the market and cost 469 euros. Wireless Headphones – Sony WH-1000XM6, Noise Cancellation, 30h Autonomy, Hi-Res, Fast Charging, Comfortable, Foldable, iOS/Android, Black The price could vary. We earn commission from these links They have some of the best noise cancellation out there. The WH-1000XM family headphones have been standing out for years, especially considering that Sony has been polishing them generation after generation. As we already told you in your analysisthese headphones are a fantasy in many ways. Where they perhaps stand out the most is in their active noise cancellation, the best we have been able to try to date. This will allow us to have a very interesting experience that is rounded off by six microphones that will allow us to have great call quality. In fact, it has a multidirectional system based on AI that allows us to capture our voice accurately, greatly reducing background noise even if there is a lot of commotion around us. Of course, very much in line with what this family of headphones offers, the WH-1000XM6 offer outstanding sound qualitywhich is also versatile and ideal for any type of sound. This will allow us to have sessions where we can mix genres and different types of songs, always maintaining a powerful and balanced sound that we can modify as we wish from our mobile. Two more details. The first is its design, very ergonomic and designed to make it very comfortable to wear them on the head. In addition, they are foldable and come with a case so that we can store them when we are not using them. It is also worth highlighting its autonomy, which revolves around 30 or 32 hours if we use active noise cancellation. One of the best options in stores, without a doubt. We have a cheaper option that also performs great If we are looking for headphones like the ones before, but we have a tighter budget, then perhaps the model fits us better. Sony WH-1000XM5SA. This, which we also analyze in Xatakaoffers a quality experience at a price that is much more attractive. In fact, right now we can buy them for 299 euros at MediaMarkt and includes a soft case so that we can transport them comfortably. Wireless headphones – Sony WH-1000XM5SA, Soft case, Noise cancellation, 30h, Hi-Res, Fast charging, Bluetooth, Headband, iOS/Android, Black The price could vary. We earn commission from these links It is true that these headphones do not fold like the previous model, but despite this they have an adjustable headband and a design that is also designed to offer comfort even during long sessions. Its active noise cancellation also gives a great result and its autonomy is around 30 hours. Some of the links in this article are affiliated and may provide a benefit to Xataka. In case of non-availability, offers may vary. Images | Sony, Xataka In Xataka | Best wireless headphones. Which one to buy and 21 models from 15 euros to 470 euros In Xataka | Best truly wireless earbuds (TWS) with noise cancellation. Which one to buy and ten recommended models

“Silence” The noise of food in our head

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After several years using semaglutida drugs (such as Ozempic either Wegovy) For weight loss, we have gradually discovering how they exercise this function. These medications, initially developed as diabetes treatment, emulate an important hormone related to the digestive process. But there are still more details that we continue discovering. Silence the noise. A study He has found indications that Ozempic and the rest of the drug -based drugs are able to silence the “noise of the food.” This means that treatment is able to reduce obsessive and intrusive thoughts related to food and eat. Explaining operation. Biochemical mechanisms behind the effects of Semaglutida They were already known. This compound is an agonist of the GLP-1 receptors (peptide similar to glucagon 1), that is, they act as a kind of Analogue of this hormonemaking our body think that we are segregating it. This hormone fulfills two functions, each related to one of the clinical uses of this drug. The hormone is secreted when we eat and transmits information to the pancreas so that it begins to segregate insulin. That is why treatment is useful for glycemic control in patients with type 2 diabetes. The second hormone function is fulfilled in the brain, and that is that the LPG-1 is responsible for notifying the brain that we have eaten in order to generate the feeling of satiety. This would be at least one of the fundamentals behind the use of semaglutida as a formula to lose weight. Expanding our knowledge. The study was conducted by researchers from Novo Nordiskthe Danish pharmacist responsible for developing the semaglutida and therefore of the manufacture of medications based on the formula such as Ozempic and Wegovy and an external market for market research. The analysis was based on a survey of 550 participants, most women and with an average age of 53 years, all users of weight loss treatment. Most of the participants indicated having consumed psemaglutida for at least four months, and also a large majority indicated an initial weight of at least 92 kg at the beginning of the treatment. Four times less. According to Indicates the responsible team From the new study, the proportion of participants who “experienced constant thoughts about food” went from 62% to 16% throughout the study. The proportion of those who considered that “they spent too long thinking about food” went from 63% to 15%. According to the team responsible for the study, the “uncontrollable thoughts on food” also descended, moving from a 53% prevalence to one of 15%. The portion of participants also descended that they considered that thoughts on food distracted them from day -to -day activities, from 47% to 15%. The investigation has been presented at the annual EASD meeting (European Association for the Study of Diabetes), In Vienna. Placebo effect? There are some details that suggest caution when interpreting the results. The first is that we are faced with a survey and not before an experiment with a control group and randomized allocation of the participants between control group and the experimental group. This implies that we cannot rule out that what is observed is simply due to placebo effect or some other form of autosugestion. In the Press note It is pointed out that three of the researchers responsible for the new study are also employees of Pharmaceuticals Novo Nordisk. This does not necessarily remain validity to the study, but transparency is an indispensable requirement in this type of work. The study, for now, has not gone through the revision process of peers of those who are published in scientific journals. In Xataka | Novo Nordisk has found the formula to recover the profitability of Ozempic: fire 9,000 employees Image | Chemist4u / Xataka with Gemini

LG has created a “invisible” aspirator robot. It is saved under the sink, it makes little noise and keeps the mopa always ready

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Aspiring robots have become regular household partners. They have gone from being a technological whim to a practical tool that avoids spending hours to cleaning. However, as we get used to them, we have also begun to demand more: It is not enough that they aspire wellwe want them to do it without interrupting our routine, without occupying space or generating noise. The real comfort is that they work without us just perceiving them. In this scenario it appears LG’s last proposalthought precisely to make that jump. A model that not only seeks to fulfill the task of cleaning, but to do it in the most discreet way possible. The concept is not to add more buttons or striking functions, but in reducing its presence at home, to the point of becoming almost invisible to the user’s eyes. Technology that cleans and disappears from the visual map The South Korean firm will present at the IFA 2025 fair an aspirator robot that moves away from the conventional. Instead of settling in a visible base in the middle of the room, Your station hides under the sinkoccupying a space so far wasted in many kitchens. With a design designed to go unnoticed, it is integrated into the domestic environment without altering aesthetics or requiring additional surfaces. We are facing a proposal that not only seeks discretion, also comfort. The station door opens and closes automatically so that the robot can enter and leave without user intervention. In this way, the cleaning experience becomes completely hands -free, in a line other than that of other vacuum cleaners that continue to depend on voluminous stations in sight. Beyond its hidden location, the robot incorporates technical improvements designed to optimize cleaning. According to LG information, it integrates an artificial intelligence chip that allows you to recognize furniture, objects and areas with dirt, which translates into a more precise navigation and adapted to the environment. It also has a system that detects carpets and automatically orders return to the station to detach the mopa, avoiding unwanted spots on textile surfaces. The station, with discreet appearance, also plays an active role in maintenance. Not only loads the device, it also sterilizes the mop with hot water and steam after each use, reducing odors and guaranteeing constant hygiene. With this, the South Korean company seeks that the user does not have to perform additional tasks and that the feeling of cleaning is maintained at all times. Although the proposal is attractive, there are still important questions. LG has not revealed the commercial name of the model, or its price, nor the availability date in Spain. Nor has it detailed essential technical aspects, such as suction capacity or battery autonomy, data that usually make a difference when choosing between one vacuum or another. The South Korean company has preferred to reserve that information for later, within the framework of the IFA 2025 fair, which is held in Berlin from September 5 to 9. Until then, what is known is rather a declaration of intentions: an approach oriented to practicality and discretion, with the challenge of demonstrating in practice that may be up to its rivals. LG’s challenge is not less, because it enters In a field with consolidated actors. Brands like Irobot, with the Roba Max 705They have opted to facilitate cleaning in households with pets. Roborock, with Saros Z70has taken an innovative step by integrating a robotic arm that expands the extent of cleaning. And dreame me, with the Aqua10 Ultra Roller Completeit focuses on solving one of the usual weaknesses of these devices: the maintenance of the mop. The commitment to a robot that practically disappears seeks to differentiate LG in this competitive scenario. It is not just about offering an effective product, but about convincing users that discreet integration and minimum maintenance are added values ​​in front of a very varied catalog. The LG approach fits with a clear trend: we want technology to do its job without interrupting us. Aspiring robots had already earned a place at home, but this movement points to a new level of integration. A device that automatically cleanshe stays ready by himself and is barely seen. It remains to be seen if the real performance accompanies the promise. Images | LG In Xataka | DREame H15 Mix, Analysis: If I could only buy a vacuum cleaner to clean everything, it would be this

Threads is eating the toast to X. He is doing it without making noise and with some data that already starts to weigh

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Not all the mountain is oregano and not all text -based social networks are X. After the Elon Musk arrival at xthen Twitter, there were few users who fled from the bird’s social network in search of more green pastures. It was then that Mark Zuckerberg, Meta CEO, opened the doors of his: Threads. Two years They have passed Since then and the platform has grown to become a powerful X rival, one that already begins to stand up. The data. As confirmed yesterday Zuckerberg and Adam Mosseri (Instagram CEO) In its official profiles, Threads has managed to reach 400 million monthly active users. It is a significant figure, especially considering that they closed 2024 with Something more than 275 million users that in April the amount amounted to 350 million. 23 Twitter tricks – This social network is completely dominated! Monthly active users (MAU) are a key indicator to quantify the performance, state and health of, in this case, a social network. This metric measures the number of unique users who have visited the platform at least once during the past month. That the Mau grow is a good sign. And what about X? The only information related to X we have in some of the latest statements by Linda Yaccarino, which until a few weeks ago was the CEO of X. According to YaccarinoAs of April 2025 x, it had 600 million monthly active users. The growth was, however, softer. In September 2024 X it had 570 million Mau that, in January, became 586 million. That is, in general terms X it has more monthly active users than Threads, but the growth of Threads is much higher. On the other hand, it is also evident that Threads has more growth capacity than X, a social network that Elon Musk apart, already showed signs of having touched the roof when it was Twitter. Anyway, they are data that must be taken with tweezers because in both cases the source are the ceos of the platforms and, therefore, interested parties. A matter of use. However, there are more third -party data that support the growth of Threads. According to SimilarWebThreads and X have a very similar amount of daily active users (Dau) in their mobile apps: as of June 2025, the X and Android apps had 132 million Dau (15.2% less than the previous year), while Threads added 115.1 million (127.8% more than the previous year). The photo is very different if we look at the use of the websites, with X adding 145.8 million daily visits and Threads only 6.9 million. On the other hand, and according to Apptopia data Shared by Sheel MohnotThreads wins X in another key metric: the engagement. Threads users enter the app 6.6 times a day and each session lasts 190 seconds, while those of X enter 7.3 times and 150 seconds pass. This, in other words, means that Threads users spend 21 minutes daily using the app, while X spends 18 minutes. Threads has fewer users, but those who have them retains them for longer. Threads has a large user tractor: integration with Instagram THE ALMENDRUCO trick. It is no secret that goal has made Threads grow based on integrating it with one of the great titans of the industry of the industry of the doom scrolling: Instagram. IG users see some THREADS posts in their feeds, they can interconnect both profiles and even receive Instagram Push notifications with Threads content. Goal has its weapons and is using them quite intelligence. And Bluesky? Another of the most popular alternatives is Bluesky. After growing greatly at the end of last yearthe platform currently adds 38.2 million registered users, although its real activity is much lower than that of X and Threads users. According to the data of your own API, you have between 600,000 and 700,000 users publishing content and around 1.2 million interacting with the posts. At the moment, it still does not shade the proposals of Meta and X. Cover image | Xataka In Xataka | Bluesky and Fediverso want to stand up to the goal. These are the alternatives to Instagram that are already on the table

Terraces that absorb the noise and let you know if you pass volume

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One of the favorite neighborhoods to leave in Valencia is Ruzafa. It concentrates a lot of gastronomic and leisure offer, which for visitors is wonderful and for neighbors not so much, than They have been complaining years of noise on weekends. The City Council has had an idea to minimize noise: terraces that absorb sound and warn when certain decibels are passed. The project. It is being carried out within the framework of Valencia Innovation Capitalan initiative of the Department of Innovation. The objective is to create an official model that can be taken to other parts of the city and that “responds to criteria of sustainability and resilience to climatic conditions, with the aim of facilitating the right to rest of the neighborhood”, as reported in Europa Press. At the moment the project is in a pilot phase and the Ruzafa neighborhood has been chosen to carry out the first test, which will end in November. Ecoterrazas. Thus they have called the new anti -Red terraces that have already been installed in nine stores on Cura Female Street, one of the busiest in the neighborhood since it is pedestrian and is full of premises. The terraces have several elements focused on reducing both noise and heat. Are the following: Umbrellas: They have several layers and a special fabric that can reduce the temperature. Phonoabsorbent discs: made with a material that absorbs sound waves. At the same time they act as parasol. Lamps with intelligent notice: They are small connected table lamps that, if the allowed decibels are exceeded, change red. Click on the image to access the publication in X. Fed up neighbors. The reaction of the neighbors has not been waiting. The Russafa Association rests described the “posture” measure and denounced that just three days after the installation several panels had already been collected. In addition, the project is concentrated in one of the busiest streets, but the problem It affects more than twenty streets in which there are almost 300 leisure and restoration stores. Zas. Are the acronym for Acoustically saturated zone. The Ruzafa neighborhood It has been declared declared Zas Zone. This measure cuts the opening schedules and limits the new terraces licenses. However, it does not collect anything about other types of establishments. The neighbors already They have denounced that it does not include any measure to limit the schedules of discos and pubs. Many of these stores are soundproofed, the problem is that people spend a lot of time in the adjacent streets, generating noise high at night. Insufficient. The truth is that the initiative of the anti -Red terraces is interesting as a starting point to minimize noise, but in gentrificed neighborhoods such as Ruzafa, full of premises and also tourist apartments, the problem of noise goes beyond the terraces of the bars. Neither is its effectiveness: the same day of its installation Noise levels that reached 67 decibels were recorded In the two areometers that the City Council has installed on that street. The maximum registered in this location has reached 74 decibels, according to the City Council in its Sonometric study. Images | Valencia Innovation Capital and Wikipedia In Xataka | The other silent pest of European cities: noise

Suddenly, the unbearable noise of the speakers has stopped

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The story between the two Koreas has been full of disagreements. Let’s put as an example the last twelve months: South Korea received a rain of balloons loaded with garbage, and reply to the “neighbor” arrived in drones and propagandato which “the north” replied marking the enemy in the very constitution. North’s revenge was a noise -shaped rumble, and the south was no less with an infinite playlist of K-Pop. And, suddenly, one of the two has taken the white flag, and the other has followed him. Silence on the border. In what could be considered as a historical fact, a symbolic and strategic turn towards reconciliation, South Korea has off the speakers of propaganda that during the last year transmitted K-pop songs without stopping next to ideological news and messages through the border with North Korea. The decision, taken by the New President South Korean Lee Jae-Myung, marks one of his first specific steps to lower tensions Between Seoul and Pyongyang, after years of deterioration Under his predecessor, Yoon Suk Yeol. The measure intends to restore Trust channels and dialogue in a peninsula that follows Technically at war Since 1953. As explained by its spokesman, the suspension seeks to “restore confidence in intercorean relationships and build peace in the Korean Peninsula.” The War of Sound. We already said it at the beginning. The previous policy had resulted in a peculiar climbingbut the most intense: while South Korea used high -power speakers to broad Sound equipmentgenerating disturbing noises that affected everyday life in border South Korean villages. He counted The New York Times That, to protect themselves from noise, many residents installed windows with double glazing and insulation systems. In turn, the conflict moved to heaven, with South Korean activists (many northern deserters) Sending balloons Loaded with critical pamphlets to Pyongyang, to which the North Korean regime replied with balloons Full of plillas and garbage. This dynamic of mutual reprisals further aggravated a relationship already marked by hostility and distrust. The Donghae Bukbu line on the east coast of Korea. This road and rail connection was built for the South Koreans visited the tourist region of Monte Kumgang in the north Change of course. The former president Yoon Suk Yeol, deposed after imposing Briefly martial law in December and accused of promoting conflict with North Korea, had promoted the Use of propaganda as a means to undermine Kim Jong-un informative control. His government not only defended the speakers, but also encouraged Balloon sending as part of an ideological offensive in the name of freedom of expression. In contrast, Lee Jae-Myung, chosen in part for his promise to reduce tensions, has asked activists to cease in launch of pamphlets, arguing that these actions do not improve North Korean access to external information, but also raise the risk of Armed reprisals and endanger the southern border communities. Strategic pragmatism. On the other hand, human rights organizations and activists They have criticized harshly the decisions of the new government, accusing him of giving in to Pyongyang and limiting freedom of expression in South Korea. They argue that, by interrupting the speakers and discouraging the balloons, citizens of the north of one of the few access as possible to outside world information. For its part, the South Korean government has indicated that it could resort Aviation laws and public safety to prevent these practices, considering that they raise the risk of direct confrontation and endanger local inhabitants, who in many cases have expressed their relief due to the recent sound calm on the border. There is truce, but fragile. It is the last of the legs to analyze. North Korea’s reaction to this gesture of distension has not been immediate, although the next day It also ceased Its own speaker transmissions, which suggests a positive response, at least momentary. However, the general context continues to be tense. Under the leadership of Kim Jong-un, the regime It has hardened his position to the south, openly declaring that does not seek reunification And that will treat South Korea As an enemy To defeat in case of war. In addition to cutting all land ties between the two countries, North Korea has intensified their essays With nuclear missiles and has rejected all kinds of dialogue with Seoul and Washington. A new attempt. What seems clear is that, although Turn off the speakers It will not resolve the multiple open fronts in the interorean relationship, it represents a significant gesture in a prolonged cycle of sound and symbolic confrontation. By unilaterally suspending these actions, Lee Jae-Myung seeks to establish the basis of a New political narrativebased on the reduction of tensions and the reconstruction of diplomatic channels. No doubt, the balance between democratic principles, national security and geopolitical realism remains delicate. But for now The silence reigns On the border, and it is possible that the future of this truce depends on whether the north or the south end up turning the decibels of their speakers again. Image | Driedprawns In Xataka | The day that USA invaded Panama at the rhythm of rock. He spent three days without stopping “bombing” the Vatican embassy In Xataka | North Korea has deployed a new psychological weapon against South Korea: an unbearable noise

We have been trying to recover the concentration for years using white noise. These researchers believe that we are self -taught

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In 1984, the German director Philip Gröning He wrote to the prior of the Great Cartuja requesting permission to record a film about the isolated and lonely life of the Cartujos monks in the heart of the French Alps. That is, about the great silence. The monks told him they had to think about it and thought about it for 16 years. He left everything recorded in ‘Into the great silence‘And every time I cross the movie I think about the same thing: that this deep and dense silence is an endangered species. In the modern world We can only use noise cancellation And, if perhaps, put on white, pink or brown noise. Or we believed. But is it really for something? That is what Joel T. Nigg and his colleagues from Oregon Health & Science University have wondered. In A recent article They have systematized everything that is known so far and, although there is good news, their conclusions are a jug of cold water. To start because, although it is an issue that is spoken a lot, there is no quality research that is based. NIGG’s team He just found 13 Useful studies (with 335 participants in total). The sample was limited, but enough to explore how the different types of noise affect the attention and cognitive function in young children and adults. And what have they discovered? Indeed, as we thought“White and pink noise improve performance in tasks that require attention for those who have ADHD symptoms.” For going to the data, they found “a small but significant positive effect (improvement of between 8 % and 10 %) in the executive care” of these people. In addition, the results are surprisingly consistent. In fact, it seems, those who were not medicated, obtained better results. What is the problem, then? That the effect is reverse in the case of people who did not have ADHD. “In this case, white and pink noise negatively affected the performance in the task,” Emily Reynolds explained. A notice to navigators. Because on the one hand, it is a good sign that, often, the information we obtain online, from mouth and even the theoretically reliable sources. The evidence available in these fields is usually much more anecdotal than we would like to confess. However, we should not exaggerate the conclusions of this work. After all, as the authors themselves saidthe investigation is scarce and not as good as we would need. That allows us to draw some conclusions, discard some things; But do not unbrush all the pitch. So … we must stop putting white noise? At least we should rethink it if what we want is to concentrate. It can be used for other things and, who knows, there may be cases that are better than the alternative (listening to music, having the background TV …); But in general terms, it seems that it would be necessary to rethink it a bit. Image | ICONS8 TEAM In Xataka | Four experts explain what it really is like to have a good night: sleeping “of a pull” is a myth

Harley-Davidson wanted to move from thunderous noise to electric silence. The joke has cost him 20 million dollars

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20 million dollars. It is what It has cost Harley-Davidson The experiment of offering an electrical alternative to its classic custom motorcycles. Livewire, the brand that created by and to offer a different path to that of combustion motorcycles, has only managed to sell 33 motorcycles in the first quarter of 2025, 72% less compared to last year. A Lousimo Year Start. In the first quarter of 2025 Harley-Davidson sold 38,000 motorcycles. In the same period, he sold 33 Livewire. In the case of its electric motorcycle division it is a 72%drop, although 2024 was not a good year: they sold 117 Livewire compared to 57,000 Harley-Davidson. The company itself recounts in its account report that there is no demand for electric motorcycles, and that losses in this division amount to 20 million dollars. What Livewire offers. The world of motorcycles is passionate, even more so if it fits in the case of buying a Harley. They are faces, little efficient and with dynamic qualities at least debatable. Even so, they fall in love with thousands of users worldwide for their aesthetics, thunderous sound and quiet travel philosophy. It is not something they have managed to convey with Livewire. Although its slogan is that of “Electric motorcycles with soul”the reality is that the state of the electric motorcycle beyond the urban scooter, is gloomy. Models such as Alpeist S2 have a price of 19,148 and an official 194km autonomy in city, just over 100km on open road. Figures that make practically impossible to bet on one of these motorcycles to the minimum that we want to leave with them. Harley is not alone in this desert. Ego, one of the pioneers in electric motorcycles and the main protagonist of the Moto E category (the electric GP motorcycle), announced its bankruptcy in October 2024. Pioneer marks such as Zero, with barbarities such as SR/S (a motorcycle with 275km autonomy, recharges in an hour and a tip of 200 km/h), are sold in Spain for 23,790 euros. They are especially high prices compared to any of their combustion alternatives, practically double. The passionate element. The electrification in the car is inevitable: it is, for the most part, a utensil to move from point A of point B (a separate question is how much we want to spend on it and how fans we are of motor racing). But, on the road motorcycle, the thing changes. The only rational motorcycle is the scooter. Everything else is the result of passion for motorcycling, weekend routes and, on a great extent, sound. According to Anesdor data, as of April 2025, the electric motorcycle is 4% of the Spanish Total Spanish Park, completely starring scooters (both particularly and, mainly, rental fleets). The future of the motorcycle. Motorcycles, due to their low displacement, are usually much less polluting vehicles with respect to cars. It is something that will increase even more with the new regulations, Much stricter in noise and emissions. Associations such as Anesdor fight for a legal framework in which the motorcycle is protected and can function as a sustainable mobility alternative. The surcharge of electric motorcycles is especially notable, with products that double the price at their combustion alternatives even in the simplest models. If we add that, with current technology, The autonomy is around 100kmthis segment is especially difficult to open hollow. Image | Xataka In Xataka | The 11 cheapest and most autonomy electric motorcycles: the best quality-price options

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