frequency

In 2009 IHe listened to listen for the first time in the streets of Tokyo. For years, the Kitikahama Parkin the district of Adachi, he had been recurring white of acts of vandalism, especially in public facilities such as bathrooms and urban furniture. Damage, mainly attributed to groups of adolescents who frequent the area at night, had meant a significant cost for local authorities. And since then, a Imperceptible noise For much of the population has been recurring. A sound that has its origin in Europe. The mosquito. Years before, in 2005, the New York Times spoke of the arrival of an invention to the United Kingdom. What began as a child auditory discomfort was transformed years later into an unusual solution for a persistent urban problem. Howard Stapletona British engineer, he remembered how, at age 12, upon entering a factory with his father, he was forced to go out immediately by an unbearable sound that adults did not even perceive. Decades later, that experience led him to create The mosquitoa device that emits a high frequency buzz perceptible only by young ears (mainly around twenty) and practically inaudible for those who have passed thirty. Its purpose was as direct as controversial: drill teenagers that congregate in noisy in front of stores, generating discomfort, intimidations and even episodes of theft and violence, without the need for direct confrontation. Personal idea to experiment. The first real mosquito test took place in Barry in 2005, a town in southern Wales, in front of a spar grocery storemanaged by Robert Gough and his family. Before the installation, the place suffered daily La presence of adolescents They smoked, drank, insulted customers and broke into the establishment. Gough had considered resorting to classical music to large volume, but never implemented it. It was Stapleton who offered to install the device testing. In a matter of little time, the usual congregation of adolescents disappeared. Some tried to resist, entering the store with their fingers in their ears and asking to turn off the buzz. Gough, ingenious, told them that the device was to scare birds due to avian flu. The result was a Radical transformation: Before conflicting teenagers now entered, bought, and they went without causing problems. Mosquito installation in a Philadelphia store It hurts, but it doesn’t exhaust. We talk about a device that emits a kind of chirp pulsating by Above 17 kilohertzup to 75/80 decibels, comparable to a noise of tinnitusIt is not painful, but very irritating. Stapleton said he tested different frequencies with the help of his own children to formula That “I did not harm, but it would bother enough to want to leave.” His intention was never punishing, but Simply dissuadecausing an discomfort that pushes the adolescent to retire on its own. While some adults can still perceive the sound, the device is designed thinking about behavior patterns rather than strict age ranges: hardly a 30 -year -old person is around the entrance of a store for hours. Professor Andrew King, an expert in neurophysiology at Oxford University, I recognized years ago To the Times that although the hearing of high frequencies decreases with age, that loss is gradual and, therefore, some adults could also hear it. Stapleton will consider it irrelevant: “The mosquito is not for them.” Cross borders. After its appearance, the mosquito It generated great interest. Stores, railway deposits, shopping centers and British local authorities They requested units. Stapleton, at that time, already contemplated more powerful versions Activable by panic button, designed to repel crowds that enter into mass to steal, which in the United Kingdom is known as Steaming. Its logic It was simple: “It is difficult to steal with the fingers in the ears.” From Europe and the US to Japan. Four years after the invention was established in different cities from the United Kingdom, then Europe, and finally the United Statesthe mosquito made the leap to Japan. Given the numerous acts of vandalism, the district of Adachi decided to resort to the controversial technological solution, but growing in popularity. Pilot test In Japan, some shops and They had implemented Previously after receiving complaints about garbage, noise and concentration of youth groups, but 2009 was the first time it was installed in A public park. The Adachi administration, which had hired the device to the Melc Co LTD company, based in Chiyoda, installed it in the area as part of an essay that would last until March 2010. Background: Vandalism costs in the 470 parks and public areas of Adachi in the previous years had overcome the 3 million yenso any solution that could reduce non -invasive figures represented an attractive option. According to Melc representatives, the objective It was clear: generate an environment uncomfortable for offenders without altering the tranquility of the rest of citizens or provoking neighborhood complaints. And in the trains. Although today the number of facilities of this type is unknown in Japan, in the social networks They abound videos and comments of young people alluding To this type of sounds. Bloomberg had that even a version of the mosquito has also been installed in trains stations. In many of them ultrasonic devices had been placed that emitted a high frequency sound only noticeable for children under 25 years. The devices, designed to discourage merodeus without confrontations, caused obvious reactions In students: discomfort faces, accelerated steps and complaints, without most knew where the sound comes from. Meanwhile, older adults walk imperturbable, unable to hear the signal. The technology, originally from Wales, had found in Japan its most systematic and culturally accepted use. Between defense and stigma. Counted in a long NPR interview to Stapleton that the mosquito has generated a debate about the Technological intervention limits in public space. While some celebrate their ability to restore tranquility in commercial and school areas without violence or clashes, others consider that their indiscriminate use It can be equivalent to criminalizing the default youth. Stapleton responded That the true enemy is not adolescence, … Read more