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Scientists Have Discovered a Shape That Blocks All Sound
Scientists have developed an "acoustic meta-material" that can catch certain frequencies passing through the air and reflect them back toward their source. When a loudspeaker was placed into one end of a PVC pipe with a 3D-printed ring of the metamaterial, the ring "cut 94% of the sound blasting from the speaker, enough to make it inaudible to the human ear," reports Fast Company. From the report:
Typical acoustic paneling works differently, absorbing sound and turning the vibrations into heat. But what's particularly trippy is that this muffler is completely open. Air and light can travel through it -- just sound cannot. The implications for architecture and interior design are remarkable, because these metamaterials could be applied to the built environment in many different ways. For instance, they could be stacked to build soundproof yet transparent walls. Cubicles will never be the same.
The researchers also believe that HVAC systems could be fitted with these silencers, and drones could have their turbines muted with such rings. Even in MRI machines, which can be harrowingly loud for patients trapped in a small space, could be quieted. There's really no limit to the possibilities, but it does sound like these silencers will need to be tailored to circumstance. "The idea is that we can now mathematically design an object that can blocks the sounds of anything," says Boston University professor Xin Zhang, in a press release.
You can see a demo of the noise cancellation device here.
https://www.fastcompany.com/90316833/scientists-have-discovered-a-shape-that-blocks-all-sound-even-your-co-workers
https://www.youtube.com/watch?v=Fd1D42dVxS0 |
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| There are no conversations. |
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| cauz |
March 13, 2019, 2:57 p.m. |
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| Herman Cain |
One of the things that I did before I ran for president is I was a professional speaker. Not a motivational speaker - an inspirational speaker. Motivation comes from within. You have to be inspired. That's what I do. I inspire people, I inspire the public, I inspire my staff. I inspired the organizations I took over to want to succeed. |
| Alec Baldwin |
Ultraconservatism is, to me, so illogical. Everywhere you go, conservatives want to cut, cut, cut, cut - cut money for powerless people. So, that's the biggest problem I have with them. |
| Scott Adams |
Scientists will eventually stop flailing around with solar power and focus their efforts on harnessing the only truly unlimited source of energy on the planet: stupidity. I predict that in the future, scientists will learn how to convert stupidity into clean fuel. |
| Jefferson Han |
In fiber optics, the cable is a light pipe or waveguide, into which you inject light. If a finger presses on the pipe, it disrupts that light within the waveguide. |
| Aleksey Igudesman |
We developed our own type of Igudesman and Joo electric violin, let's say, and funny enough, the shape of it was developed by the head technician of Steinway. It's actually an electric violin, which is made from the stick that holds up the piano lid. |
| Ariel Garten |
Much of the time, we're transfixed by all of the ways we can reflect ourselves into the world. And we can barely find the time to reflect deeply back in on our own selves. |
| Lois Capps |
Mr. Speaker, less than 10 percent of our Nation's children walk or ride their bicycles to school, and too many schools continue to invite fast-food vendors into their cafeterias. |
| Daniel Ek |
I actually bought a travel guitar, and that guitar is really cool. You can actually fold the guitar, and you can plug headphones into it, but it's acoustic, or semi-acoustic. |
| Mark Gatiss |
Grooming-wise, it is now a constant battle as I progressively turn into my father. I have to keep on top of ear and nose hair - things you never believe will happen to you. Suddenly I have a shaving brush in my ear and I don't know where it's come from, and the more hair I take the out, the more it surges back. |
| Randy Bachman |
Generally, you are held to a sound and that becomes your sound. That gets branded as your sound, and all the copycats start with it because the labels are looking for that sound. |
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Researcher Finds A Hidden 'God Mode' on Some Old x86 CPUs
"Some x86 CPUs have hidden backdoors that let you seize root by sending a command to an undocumented RISC core that manages the main CPU," Tom's Hardware reports, citing a presentation by security researcher Christopher Domas at the Black Hat Briefings conference in Las Vegas.
The command -- ".byte 0x0f, 0x3f" in Linux -- "isn't supposed to exist, doesn't have a name, and gives you root right away," Domas said, adding that he calls it "God Mode." The backdoor completely breaks the protection-ring model of operating-system security, in which the OS kernel runs in ring 0, device drivers run in rings 1 and 2, and user applications and...
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Was a Sonic Weapon Deployed in Cuba?
Hearing loss, dizziness, sleep and vision problems, tinnitus, headaches, fatigue and now brain damage—these are the symptoms suffered by two dozen US and Canadian diplomats covertly attacked over the past year while serving in Cuba. US officials initially posited that the diplomats were victims of some sort of sonic weapon, but acoustics experts say that’s nearly impossible.
Details of the attacks have slowly become public over the last few months through a combination of media reports and announcements from US officials. Many details are still unclear....
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Astronomers Discover 13 New Fast Radio Bursts From Deep Space (nationalgeographic.com)
Astronomers have detected 13 high-speed bursts of radio waves coming from deep space -- including one that regularly repeats. While the exact sources remain unknown, the new bevy of mysterious blasts does offer fresh clues to where and why such flashes appear across the cosmos. From a report:
Fast radio bursts, as they are known to scientists, are among the universe's most bizarre phenomena. Each burst lasts just thousandths of a second, and they all appear to be coming from far outside our home galaxy, the Milky Way. Since these bursts were discovered in 2007, their cause has remained a puzzle. Based o...
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A magic ring called the "Seal of Solomon" was supposedly given to Solomon and gave him power over demons or Jinn. The magical symbol said to have been on the Seal of Solomon which made it efficacious is often considered to be the Star of David[citation needed] though this emblem (also known as the Shield of David) is known to have been associated with Judaism only as recently as the 11th century CE while the five pointed star (pentagram) can be found on jars and other artifacts from Jerusalem dating back to at least the 2nd and 4th centuries BC and is more likely to have been the emblem found on the ring purportedly used by King Solomn to control the Jinn or demons. Asmodeus, king of demons, was one day, according to the classical Rabbis, captured by Benaiah using the ring, and was forced to remain in Solomon's service. In one tale, Asmodeus brought a man with two heads from under the earth to show Solomon; the man, unable to return, married a woman from Jerusalem and had seven sons, ...
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Google Works Out a Fascinating, Slightly Scary Way For AI To Isolate Voices In a Crowd
https://arstechnica.com/gadgets/2018/04/google-works-out-a-fascinating-slightly-scary-way-for-ai-to-isolate-voices-in-a-crowd/
An anonymous reader quotes a report from Ars Technica:
Google researchers have developed a deep-learning system designed to help computers better identify and isolate individual voices within a noisy environment. As noted in a post on the company's Google Research Blog this week, a...
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Fellowship of the ring, chicken wing
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I oughtta slap that opinion right out your head boy. Get in the ring for you start mouthin dat stupid shit. #carrots4lyfe
This post is a comment.
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MIT's AI Uses Radio Signals To See People Through Walls
Researchers at the Massachusetts Institute of Technology have developed a new piece of software that uses wifi signals to monitor the movements, breathing, and heartbeats of humans on the other side of walls. While the researchers say this new tech could be used in areas like remote healthcare, it could in theory be used in more dystopian applications. Inverse reports:
"We actually are tracking 14 different joints on the body [...] the head, the neck, the shoulders, the elbows, the wrists, the hips, the knees, and the feet," Dina Katabi, an electrical engineering and computer science teacher at MIT, said. "So you can get the full sti...
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This guy's motorcycle; sounded like there was a guy with a loudspeaker; pretending to sound like a motorcycle
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did you go to different realities in the different parts of the hotel? in theory if everything is frequencies then you could make an xavier-style method of searching out certain kinds of people based on their vibration patterns (potentially even searching out thoughts by the way it effects the physical body) then by identifying these frequencies or individuals, you could send out signals on the same wavelength to disrupt them or locate them
This post is a comment.
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