Unmanned vehicles are becoming more common. Big, small, smart and not very – the Copter has long ceased to be a curiosity. They are used everywhere, from the police to ordinary equipment lovers. In addition, various companies are interested in drones, including UPS, Amazon, Domino Pizza and others. Now these organizations are actively developing systems that could serve as a tool for delivering goods to customers. Not long ago, the same company Amazon filed a patent for a "landing tower" for copter-couriers. It may well be that in a few years the drones delivering pizza will be considered a common thing.
The only problem – the noise produced by drones, irritates people. Not so long ago, the agency NASA published the results of a special study relating to this point. As it turned out, drones are much more nervous on people's nerves than any type of land transport, even if the loudness of the sound produced by the copter and the car is approximately the same.
"We decided to conduct this test, not knowing that it will show such significant differences," said one of the study participants, Andrew Christian, working at the NASA Langley Research Center. The research was conceived as a project that would provide more information about drones and the attitude of people towards them. But it turned out that the results of the study were unexpected for the authors of the study.
Not so many volunteers took part in it, but the result is unambiguous – the Copters annoy people, and quite strongly. And there is no explanation for this fact so far. The participants themselves do not understand why they are so annoyed by the noise of Copter screws. Perhaps this effect is manifested for the simple reason that drones are still a novelty for many people, and the noise that they produce attracts attention, beating out the background noise common to humans. Cars have long become a part of our lives, and many of us simply do not notice them.
A study conducted by NASA can be called quite objective, because when listening to various types of noise, subjects were not told what they were hearing. The loudness of the sound of different sources was the same.
It may be that the factor of "disturbing sound" can lead to rejection by drones of a certain part of the population of any type of settlements – even large or small. And this, in turn, will lead to a slowdown in the introduction of Copter for the solution of everyday tasks such as the delivery of goods. So, for example, residents of the same street of the city in different ways refer to the noise of a courier service car and a copter.
Nevertheless, it is unlikely that this problem will delay the introduction of the drone for a long time. Amazon and other companies have already gone too far to surrender. Amazon has several developed types of drones that can deliver loads of different weight and size. Most of them are able to move at a speed of 95 kilometers per hour. As for the danger of such a system for a person, it will arise only if the multi-copter suddenly breaks and falls on someone's head. But developers try to avoid such moments by laying airways for drones passing over sparsely populated areas. "Our Copters fly high, being above the roofs of most buildings," said a representative of Amazon earlier.
However, the final design of the systems is not yet ready. Amazon explains this in the following way: "We are testing several types of aircraft and delivery mechanisms in order to determine the best method in different environments."
In addition, active work is now underway to make the Copter Quiet. In this case, it becomes possible to remove the "irritation factor", and people will become more neutral about the flying couriers. The authors of the study hope that the developers will be able to make drones invisible to everyone, which will make it possible to develop the infrastructure of delivery by drones faster, as well as other services.
But before these drones are widely used as flying employees of various companies, these companies will have to sort out various legal issues. The problem is that in large cities of most countries drones are banned. The authorities are just afraid of the cases mentioned above – when the drone goes down and falls on someone's head. So before starting to develop "koptern" delivery services, it is necessary to amend the existing legislation.