Connect with us

General

New Noise-Blocking Material Could Drown Out Drones

Advertisement
Click this link to get the Moto Z2 Force for just $31.50/month. Unlimited and device payment activation required. Includes free shipping. Restrictions may apply.

Though less publicized than its notorious air and water counterparts, noise pollution is a growing problem.

And while modern sound-mitigating barriers may help drown out the whir of rush-hour traffic or contain the symphony of music within a concert hall, they leave little room for airflow.

So, a pair of Boston University mechanical engineers created an acoustic metamaterial designed to silence sounds at their source, without blocking the movement of air.

By scrapping the traditional idea of a sound barrier, they instead created a new material—one with unusual and unnatural properties; in this case, the ability to exert an isolated influence on sounds.

The final product: an acoustic metamaterial.

“I’ve been working on metamaterials for more than a decade,” Xin Zhang, a professor at the College of Engineering and the Photonics Center, said in a statement. “But it was [study co-author] Reza [Ghaffarivardavagh] that gradually got me more excited about the fundamental idea of marriage between acoustics and metamaterials.”

Even the most miniscule disturbance in the air formes vibrations, which, in turn, create sound waves. It’s the same principle that explains why, in the vacuum of space, no one can hear you scream.

“Our goal is to silence those tiny vibrations,” graduate student Ghaffarivardavagh explained. “If we want the inside of a structure to be open air, then we have to keep in mind that this will be the pathway through which sound travels.”

The mathematically designed, 3D-printed acoustic metamaterial is shaped in such a way that it sends incoming sounds back to where they came from (via Cydney Scott/Boston University)

The basic premise requires metamaterial to be shaped in such a way that it sends incoming sounds back from whence they came.

In a test case, the team 3D-printed a plastic noise cancellation device, then attached it to a loudspeaker. With the press of the play button, the experimental set-up “came oh-so-quietly to life in the lab,” according to the BU press release.

“The moment we first placed and removed the silencer … was literally night and day,” study co-author Jacob Nikolajcyk said. “We had been seeing these sorts of results in our computer modeling for months—but it is one thing to see modeled sound pressure levels on a computer, and another to hear its impact yourself.”

The team found they could silence nearly all—94 percent—of the noise, making any sounds emanating from the speaker imperceptible to the human ear.

Moving forward, Zhang & Co. are eyeing their “super lightweight, open, and beautiful” structure for use in drones, fans and HVAC systems, MRI machines, and other everyday clamorous objects.

“The idea is that we can now mathematically design an object that can block the sounds of anything,” Zhang said.

“If you ask me and my colleagues, acoustic metamaterials is a relatively young direction,” she added. “It’s the future.”

The full results were published in January by the journal Physical Review.

More on Geek.com:

SOURCE

Advertisement
Samsung J7 V just $5 mo. New device payment purchase req'd. Plus, free shipping.
Bar Stools Starting at Just $38 from Ashley HomeStore!

General

Tokyo Introduces Support Robots for 2020 Olympics

Advertisement
Samsung J7 V just $5 mo. New device payment purchase req'd. Plus, free shipping.

Human athletes won’t be the only spectacles at next summer’s Olympic Games.

As part of the aptly named Tokyo 2020 Robot Project, the organizing committee introduced a team of androids designed to assist disabled fans at the sporting extravaganza.

Olympic sponsor Toyota is contributing the Human Support Robot (HSR) and Delivery Support Robot (DSR), which will roam the National Stadium, carrying food and other goods, guiding people to their seats, and providing event information.

Human Support Robot (HSR), developed by Toyota Motor Corporation (via Tokyo 2020)

“We believe that the robots will help spectators in wheelchairs to enjoy watching the events without any restrictions, to soak up the atmosphere inside stadiums, and to feel the excitement of sport,” Nobuhiko Koga, chief officer of Toyota’s Frontier Research Center, said in a statement.

Officials plan to deploy up to 16 HSRs and five DSRs, as reported by the Associated Press.

Delivery Support Robot (DSR), developed by Toyota Motor Corporation (via Tokyo 2020)

Panasonic, also a major sponsor, will provide 20 of its Power Assist Suits, used to support the wearer’s back and hips while carrying or lifting heavy objects—like, say, guest luggage.

“We strongly believe that our robot technology … will be of use to all people regardless of impairments, and to society in general, becoming a legacy for future generations,” according to Panasonic Executive Officer Masahiro Ido.

Panasonic’s Power Assist Suits come in handy when handling heavy luggage (via Tokyo 2020)

While these bots will be deployed in specific roles during the Games, the Tokyo 2020 Robot Project team hopes this international stage will help showcase their potential for wider applications in everyday life.

“The Tokyo 2020 Games are a unique opportunity for us to display Japanese robot technology,” Hirohisa Hirukawa, leader of the Tokyo 2020 Robot Project, said in a statement.

“This project will not simply be about exhibiting robots, but showcasing their practical real-life deployment helping people,” he continued. “So there will be not only sports at the Tokyo 2020 Games, but some cool robots at work to look forward to, as well.”

More on Geek.com:

SOURCE

Advertisement
Click this link to get $200 discount on iPad. Includes free shipping. Restrictions may apply.
Buy a set of 4 or more Moto Metal Wheels and get a Free Install Kit and Free Shipping! from 4WheelOnline.com!
Continue Reading

General

AI Polygraph Is Better At Detecting Lies Than You

Advertisement
Samsung J7 V just $5 mo. New device payment purchase req'd. Plus, free shipping.

Some people are natural liars, while others have no poker face. But it doesn’t take much to fool someone in blind computer conversations.

In an attempt to remove those blinders, Florida State University researcher Shuyuan Ho has developed the first online polygraph test.

“You could use it for online dating, Facebook, Twitter—the applications are endless,” Ho, an associate professor in the College of Communication and Information, said in a statement. “I think the future is unlimited for an online polygraph system.”

Imagine a future where technology can automatically identify liars and truth-tellers based on the words they type in electronic messages.

In a study published by the journal Computer in Human Behavior, Ho detailed the findings of an online game created to measure truthful and deceptive communication between people.

Players were randomly assigned the role of “Saint” or “Sinner,” then left to have a computerized chat. Researchers, meanwhile, followed along, using machine learning tech to scrutinize patterns of words and writing.

[embedded content]

Just as physical cues provide context, so, too, do language-action cues in written text.

Lying sinners were less expressive but used more ornamental words, displayed more negative emotions, and appeared anxious when communicating with truth-tellers.

Conversely, saints tended toward speculation, taking longer to respond to inquiries; sincere players provided more reasoned ideas and expressed more reflective thinking, according to the study.

Ho’s experiment highlighted that while a human can spot lies in messages about 50 percent of the time, the machine-learning approach has a much higher success rate of 85 to 100 percent.

“I want to get the world’s attention on this research so we can hopefully make it into a commercial product that could be attached to all kinds of online social forums,” she said.

“I think we all have good common sense about the people we meet face to face, but how much common sense do we have with the strangers we encounter online where you can meet a lot of people very fast,” Ho continued. “This research is so important because it can provide another reference point offering more protection. All of society can benefit.”

More on Geek.com:

SOURCE

Advertisement
Code: VZWDEAL. Enter this coupon code at checkout to get $100 discount on Samsung Galaxy Note 8. Includes free shipping. Restrictions may apply. Device payment purchase required.
Click this link to get the Moto Z2 Force for just $31.50/month. Unlimited and device payment activation required. Includes free shipping. Restrictions may apply.
Continue Reading

General

Jeff Bezos Shows Off ‘Nerdy’ Innovations at Annual Mars Conference

Advertisement
Code: VZWDEAL. Enter this coupon code at checkout to get $100 discount on Samsung Galaxy Note 8. Includes free shipping. Restrictions may apply. Device payment purchase required.

Jeff Bezos, Amazon’s CEO, is hosting his annual Mars Conference again, an invite-only event that showcases many “nerdy” innovations, including flying robots, electric multicopters, and rocket engines.

The conference, which is taking place in Palm Springs, California this week, celebrates quirky technology in the sectors of machine learning, automation, robotics, and space (MARS), CNBC reported. The aim of the Mars Conference is to advance new technology ideas, enable attendees to engage with high-tech gadgets, and discuss how these four fields will impact the future.

This year, Bezos opened the Mars Conference by taking “my new dog,” Boston Dynamics’ latest electric quadruped SpotMini robot dog, out for a quick stroll on the grounds, TechCrunch noted.

However, this wasn’t all: The Mars Conference, which doesn’t allow press in, only gives fans a sneak peek of what’s happening via tweets. Attendees shared some cool insights from the invite-only event on Twitter.

Star Wars actor Mark Hamill discussed robot sidekicks.

Bezos went for a ride in Hexa’s electric, single-passenger multicoptor.

Attendees experienced an “out of this world” feeling with NASA’s Orion spacecraft simulator.

Meet Centauro, the robot that can be your next yoga buddy.

Blue Origin’s massive rocket engine was on display outside.

Even though the “secret” Mars Conference is in session, it will be interesting to see which “geeky” devices will be advancing machine learning, automation, robotics, and space in coming years.

More on Geek.com:

SOURCE

Advertisement
Code: VZWDEAL. Enter this coupon code at checkout to get $100 discount on Samsung Galaxy Note 8. Includes free shipping. Restrictions may apply. Device payment purchase required.
Link #11. Buy Wise Company Gluten Free Food Storage Now!
Continue Reading

Deals

Advertisement
Code: VZWDEAL. Enter this coupon code at checkout to get $100 discount on Samsung Galaxy Note 8. Includes free shipping. Restrictions may apply. Device payment purchase required.
Code: MPCC5. Get $5.00 discount for Portable HD Wifi 1080P 720P Wide Angle Mini Camera Camcorder 12 Mega Pixels / Infrared IR Night Vision / Motion Detection / Video Audio Recorder Mini DV DVR Cam / for Meeting Interview Skill Learning Party
Click this link to get 15% discount on in-store pick up orders over $100. Restrictions may apply.

Trending