High Frequency

There are few sounds that actually make me cringe whenever I hear them: silverware scraping on a plate, nails scratching on a chalkboard, and piercing high-frequency tones. While the former two terrors require some physical hardware, sending out high-frequency sounds is as eas ...more

Who could resist a gummy bear? Those rubbery little candy creatures shaped like a bear are just too cute and too delicious to pass up. If you can't get any enjoyment out of those gelatin-based confectioneries, then you're simple not human. Even scientists love them, but not fo ...more

So, when Christopher brought up Nikola Tesla in his very first post on Fear of Lightning, it got me interested in learning more about the man behind alternating current. There is plenty of info out there on the Internet, widely available for free, but sometimes it's just nice ...more

One of the creepiest musical instruments ever is undoubtedly the theremin, a device originating from the early 20s that emits eerie sounds with a just a wave of the hand. If you've seen the original movie The Day the Earth Stood Still, you know what I mean—freakishly creepy. P ...more

If you've recently joined the ever-growing ranks of the cable cutters, you're far from alone. More and more people (myself included) are getting fed up with service providers' outdated subscription models and absurd pricing—and canceling their service. And why not? There are ...more

How is it that we use Firefox tremendously and yet not care for its needs? You might have noticed Firefox sometimes tends to slow and not respond often. You might have installed countless add-on in Firefox to enhance your using experience, to get the most out of your Firefox u ...more

Hey guys, remember the 'booms' in Clintonville, IN? Well, they were back the previous night. And they were louder than before. What's going on? The mayor and police would love to dismiss it as geological activity, but results show otherwise: “A preliminary review of seismic a ...more

April Fool's Day, aka National Screw with Your Friends Day, is finally here. You can always pull a conventional prank, like strategically placing a whoopee cushion on your mom's chair, but that joke has been exhausted generations before smartphones were around. We live in a d ...more

On April 7, 2017, residents in Dallas, Texas, woke to the sound of emergency sirens blaring all over the city. No one could shut them off, and after repeated efforts to contain the situation, the city had to shut down the entire system. While the media reported a sophisticated ...more

Fans of The Walking Dead can now kill time until the series returns from its winter hiatus by raising walkers from the labels on bottles of wine influenced by the show. With the Living Wine Labels app for iOS or Android, fans can unlock augmented reality content embedded in l ...more

Today's fancy cars come with all sorts of options, from power mirrors to working seat belts. Some of us condemned to live in the reality of capitalist recession have no car, or perhaps a very modest one. But your modest car can still have some cutting edge technology wedged in ...more

Valentine's Day is almost here, and if you're like me, you're scurrying to do something special for your mate. The standard chocolates and flowers just isn't cutting it anymore, and you can only make so many homemade cards before it becomes banal and meaningless. So, what can ...more

One of the major additions in the Google Pixel 4 is the new Soli chip. It's the miniature radar sensor that powers Motion Sense, a new way to interact with your phone without touching it. There are a few new gestures you'll need to learn to take advantage of Motion Sense, so l ...more

Viral infections have been the focus of attention in the development of autoimmune diseases—diseases where the body's immune system reacts to the body's own cells—because they trigger the immune system into action. In a study published in Science, led by senior author Dr. Ban ...more

What do Leo Tolstoy (writer), Beethoven (composer), Paul Gaugin (artist), and Adolf Hitler (politician) have in common? They are all considered to have suffered from the sexually transmitted disease syphilis. With the incidence of sexually transmitted infections (STIs) and se ...more

The Stun-Gun In this article, I'll show you how to make a small, weaponized highlighter. Before I get into how to built this device, let me warn you. This device is harmful! When used, it can cause burns and/or serious muscle spasms. The voltage is potentially deadly! DO NOT ...more

For all the benefits 5G brings to cellular data, it isn't without weaknesses, the biggest being privacy. Yes, the latest standard comes with breakneck downloads speeds up to 4.3 Gbps, but at what cost? Like with all things on the internet, 5G devices open opportunities for bot ...more

Whether you're in an airport, restaurant or waiting room, the insidious grip of televisions on human life is omnipresent. Sometimes it's nice to talk to other human beings while looking at them directly—actually hearing what they have to say. Thankfully, there's a DIY device ...more

We are now in the age of 5G. Carriers worldwide are upgrading their networks to the newest standard for mobile, which will dramatically improve your phone experience. How? By giving it download speeds and latency that surpass Wi-Fi. But before you upgrade, there are few things ...more

In a surprising twist of expectation management, Magic Leap managed to not only ship but deliver the Magic Leap One I ordered on Wednesday by 4 p.m. PT on the same day. After spending about an hour with the headset running through set up and poking around its UI and a couple ...more

Biometrics have a major flaw: they don't work well with personal protective equipment. Whether it's a mask obscuring facial recognition or gloves blocking the fingerprint scanner, it's a lot harder to unlock your phone when you're wearing the proper PPE. Thankfully, there are ...more

For the uninitiated, it can be difficult to buy that special hacker in your life a perfect holiday gift. That's why we've taken out the guesswork and curated a list of the top 20 most popular items our readers are buying. Whether you're buying a gift for a friend or have been ...more

The new iPhone 12, 12 mini, 12 Pro, and 12 Pro Max may seem like minor updates to the iPhone 11 lineup, but there are quite a few features that make them worth the upgrade. Apple has done a good job of highlighting all of those features, but some didn't get all of the love the ...more

Adobe Audition, Audacity, and other audio editing software have tools to isolate vocals and instruments in regular songs so that you can get an instrumental track for karaoke, vocals for an a capella version, or solo drums, bass, keys, etc. that you can use to learn the song y ...more

Apple has four iPhone models for the remaining months of 2020, but the most impressive ones are the iPhone 12 Pro and iPhone 12 Pro Max. While the iPhone 12 and iPhone 12 mini are great smartphones, the "Pro" models offer more advanced features, especially for photographers an ...more

Welcome to Microwave Energy—the next part of my Making Electromagnetic Weapons series. For the Electromagnetic Pulse Generator, check out the last three articles (One, Two and Three). I'm sure almost all of you have used a microwave at some point in your lives. As a child, I ...more

Periodically, motorcycle and ATV exhaust system can be rebuilt to maintain the proper performance and sound level expected from the exhaust system. My experience was with a dirt bike that had an aftermarket high performance exhaust installed.I bought my 99 XR400 second hand an ...more

In this article, I'll be showing you how to make a cool visual representation of sound using an old cathode ray tube (CRT) television, a stereo, and a sound source. You'll also need a pair of wire cutters, and a few screwdrivers. To properly understand this project, it's a goo ...more

Nikola Tesla. He was the man behind some of the greatest inventions of all time, including radio and alternating current. But perhaps his most visually fascinating invention is the Tesla coil. While maintaining a low current, it can produce dangerous high frequencies and volta ...more

I woke up at 4:00 am this morning in order to take some video of the last total lunar eclipse visible from North America till 2014. The eclipse was beautiful. It was amazing to watch the shadow of our planet creep slowly across our nearest neighbor. Once the shadow was blockin ...more

In this article, I'll be explaining the basics of how microcontrollers work, physically and virtually. First off, microcontrollers are no simple thing, so don't be discouraged if you find it mind-boggling! The world of microcontrollers is fascinating, engaging, and an awesome ...more

There are several ways you can go about creating your NURBS helix curve in Maya; I will demonstrate the two easiest ones. For advanced users, and people that like to figure stuff out by themselves, here are the two techniques in a nutshell: You can either create a straight N ...more

While music may not technically be a "universe language," it is the one language listened to by all. There are over 1,500 music genres today—rap, classical, rock, jazz, trap, hip-hop, house, new wave, vaperwave, charred death, nintendocore... and the list goes on. And if you'r ...more

5G is undoubtedly the future of mobile networks, and there's a good chance your next phone will have it. But just like with 4G, as carriers race to get the best 5G coverage, the ones running behind are abusing marketing terms to make themselves seem further ahead than they act ...more

If you upgrade to an iPhone 12, 12 mini, 12 Pro, or 12 Pro Max, you can take advantage of super-fast 5G speeds, but which 5G network are you actually getting and is it better than the others? Depending on your carrier, you may see 5G, 5G+, 5G UW, or 5G E in the status bar next ...more

One of the most popular usages of modern-day smartphones is listening to music. It doesn't matter if you download or stream your tunes, you are part of a massive group of users who do exactly the same. While statistics are a bit foggy on how many smartphones users download mus ...more

As many as 700 species of bacteria live on our teeth and in our mouth, and just like the microbiomes inhabiting other parts of our bodies, they change in response to diseases and other health conditions. Type 2 diabetes is the most common kind of diabetes, and estimated 29 mi ...more

Whether it's a short road trip or an 18-hour flight, our phones are now essential travel companions. No longer do we need a GPS unit, maps, cameras, camcorders, or even boarding passes. However, not all phones are created equal in this regard. Some are more suited for travelin ...more

Your iPhone might have a great camera, but it can be irritating to get things like exposure and focus right when your fingers are all over the 'viewfinder.' The Pictar aims to change that by making your iPhone as much like a DLSR as it can, keeping your fingers from obstructin ...more

So you've been playing Call of Duty Mobile for some time but can't seem to get MVP at the end of the battle. Well, since the game is a competition of players and bots, you're in an uphill battle. But you don't have to languish at the bottom. With the help of these tips, you mi ...more

Get some tinfoil hats and make a time machine because we are about to go back to the 90s and learn about some phreaking. Step 1: What Is Phreaking? Phreaking is the action of hacking into telecommunications systems, especially to obtain free calls. Phreaking was big in the 9 ...more

If you have a modern iPhone, you have an excellent video recorder at your disposal. Every iPhone since the 6S has the ability to shoot in 4K resolution, and each new iteration has brought new capabilities to the table. But even the best mobile shooter can use a little extra he ...more