At the weekend, scientists from Duke University, who previously developed a cloak of "seeing and not being seen", revealed a new cloak that is based on similar principles - but this time it is intended for those who wish to be "hearing and not being heard"
Benny Ran, ThePeople editorial team, DailyMaily
For the previous news - the cloak of "the seer and the unseen" is already here
At the end of the week, scientists from the Pratt School of Engineering at Duke University announced that they had succeeded in concocting a recipe for artificial materials, with the help of which it would be possible to produce a three-dimensional "sound cloak" - that whoever wears it will not be able to hear. The idea is reminiscent of a similar development previously presented by the scientists from Duke University - a cloak that repels microwave beams, causes them to pass around and creates the illusion that the bone inside does not exist.
The sound cloak is like a hole that opens in space, when the bone inside it seems to disappear in terms of sound waves - said Stephen Kammer, professor of electricity and computer science at Duke University, who is responsible for the discovery together with his colleagues. "After presenting the electromagnetic cloak of 'the seer and the unseen', we wondered if a similar idea could be applied to other types of waves as well. At first we assumed that this was not possible, but now it seems that we have found a suitable recipe", said Kamer.
Since suitable materials do not exist in nature, the recipe must be based on artificial materials. "It is not possible to enter a DIY store and purchase the necessary materials. Artificial materials must be produced using composite metamaterials with properties that change the normal behavior of sound waves," said Kamer.
At the moment this is a theoretical idea, but Kamer estimates that the first demonstrations will be seen in the next year or two. The idea may have some practical applications - for example, for hiding military submarines from radar devices that are based on sound waves, or designing quieter halls and studios. And what's next? Perhaps materials capable of deflecting tsunami waves or seismic waves: "If the idea works on waves of a certain type, it is likely that it can be applied to waves of all types," says Kamer.
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There is a sense that purifies the sound that comes out of dangerous or chemical gases from our area...
I wonder if something like this can be done
This will save the annoying gas masks…
Is there a mode for a robe that smells but doesn't smell? Because lately I've been having murderous farts!!
It turns out that they have already opened the cloak of a writer and not a reader 🙂
It should be noted that the uses for these technologies go beyond the areas mentioned. Although military uses and use in studios seems trivial, there are also uses in the field of medicine, in the field of aviation, research instruments based on sound waves in deep space and many other fields.
to "radar based on sound waves" (as written)
There is a name: Sonar (Sound Navigation And Ranging)
Jonathan:
There is a difference between your invention and the new invention.
The new invention also causes things that are not nonsense to pass through the cloak without being heard.
On second thought, actually you have already more or less invented this too because you are constantly wearing a cloak that only makes words of taste bypass you while the nonsense penetrates. This means that if you use both robes at the same time you will get a similar result.
Well done.
Others! I have already patented this invention.
I always hear but no one hears me.
I have said several times that the theory of evolution is an unproven fantasy, but here on the site there are still those who continue to bury their heads in the sand.
I did not read the original news but it seems that the content does not exactly match the title and the first paragraph.
If they built a cloak that causes the sound waves to behave like the light waves in the previous cloak, then the main achievement is that sound waves hitting the cloak from the outside bypass it and are not returned (and not that the person speaking inside is not heard from the outside).
This is the phenomenon that should make it possible to evade detection by active sonar (described in the article as a radar device based on sound waves).