Chemical reaction levitated by sound

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audioScientists in Switzerland have designed an acoustic levitator capable of mixing substances as they hover.

The device is built of two sound-emitting platforms that trap the substances between them.
Sound waves move upward until they are reflected by the platform above. The upward- and downward-moving waves overlap, reinforcing each other in places and cancelling out in others. This traps materials in place.

The development is described in PNAS.
The researchers managed to levitate a toothpick on their acoustic squares To demonstrate its capabilities, the researchers used it to mix a single drop of water with a single coffee grain and to bring together a minuscule grain of sodium metal with a drop of water, causing a tiny but explosive reaction.
They even managed the levitate a toothpick.
Their device though needs to use very powerful sound waves to levitate even these very small droplets and particles.

Lead researcher Daniele Foresti from the Swiss Federal Institute of Technology (ETH) in Zurich, explained that to “cancel out gravity” in this way required 160 decibels of sound (you would receive about 120 decibels in the front row of a rock concert or from a jet engine).

“That’s why we use ultrasound,” Dr Foresti said.
“[Using frequencies beyond those that human ears can detect] means we won’t hear it, so we can work with without any ear protection.”

Rocket launch Acoustic levitators were invented in the 1980s by Nasa scientists looking for ways to simulate weightlessness. But this diminutive device is the first to be able to move and control the material it levitates.
“We have total control of the acoustic field inside,” Dr Foresti said.
By making the acoustic platform of many tiny squares – each 15mm x 15mm square being its own sound-emitting device – the researchers are able to “pass” a ball of material from one of these platforms to another.

The main benefit of this remotely controlled chemical reaction is that it is contactless, meaning chemical tests could be carried out without any possibility of contamination.
“One of the tests we would like to perform is DNA transfection,” said Dr Foresti.
This is the process of introducing DNA into a cell, which is a medically useful process but one that is very sensitive to contamination.

“Some of the transfection agents [chemical substances needed to carry DNA into cells] can be rendered ineffective even by plastics,” said Dr Foresti,
“So this could be a way to overcome that problem.”

Best hands-free car kit visor-mount and earpiece

Best hands-free car kit: visor-mount and earpiece
My basic review of this new earpiece it begins well, looks rather cool, is easy to run and really power resourceful, the earpiece is a excellent product. Im glad I bought it, read further below.

audioWhat is the best hands free kit for your car? We pick from eight visor mounts and earpieces

The ban on mobile phone use at the wheel has been in force for over a decade, so there are no excuses especially with Bluetooth hands-free kits now so affordable and easy to use.

These devices are most readily available as units that mount on your cars sun visor or as earpieces and weve tested four of each. Both options eliminate the need to touch your phone, and all eight of our test kits work with voice interaction and simple one-touch button control.

How we tested them

A hands-free kit has to allow you to stay focused on the road, so we awarded top marks to the units that enabled us to make a call with minimal device interaction best achieved via voice recognition. Earpieces had to be comfortable (we wore them for two hours) and visor kits easy to mount. Sound quality was important, as was price, taken from a range of retailers at the time of writing.

Verdict

Great sound and a refined feel make the Jabra MOTION earpiece our overall winner. Plantronics K100 was the best visor kit, due to its FM abilities, ahead of the no-nonsense Parrot Minikit Neo.

Visor-mount kits

1. Plantronics K100 2. Parrot Minikit Neo

Earpieces

1. Jabra MOTION
2. Plantronics Voy. Legend

Read more: http://www.autoexpress.co.uk/accessories-tyres/86146/best-hands-free-car-kit-visor-mount-and-earpiece-reviews#ixzz2yPGgQFYc

What is Noise Cancelling Bluetooth Headset?

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headset. earphonesThere are many different types of Bluetooth wireless headsets in the competition.
One of the best types of headsets is the noise cancelling Bluetooth headset that provides you a better listening experience than its traditional counterparts. These types of headsets are specially designed for better user experience. These headsets reduce the noisy ambient sounds that destruct the listening experience of users.

These headsets utilize a technology called active noise control in order to reduce the acoustic noise.
Benefits of Using a Noise Cancelling Bluetooth Headset
There are many benefits of using a noise cancelling Bluetooth headset. Some of these benefits include the following.
The noise cancelling capability of your Bluetooth headset makes it easier for you to enjoy your favorite music without increasing the volume.

If you are travelling in a noisy vehicle such as airplane, you can use your noise cancelling Bluetooth headphones to enjoy a peaceful journey.
You can enjoy a better listening experience by using your Bluetooth headset and you don’t have to move to a quiet place to listen to what your caller is saying to you.

Another benefit of these headsets is their affordable price. You can buy your choice of headset at good rate.
What are the Limitations of Noise Cancelling Bluetooth Wireless Headsets?
Like any other thing, noise cancelling Bluetooth wireless headsets also have some limitations. However, some vendors have overcome some or all of these limitations. You are advised to be careful when you are buying a noise cancelling Bluetooth headset and make sure you are buying a headset with the minimum limitations.

Some of the common limitations that you may find in most headsets include the following.
Some noise cancelling headsets may introduce additional noise that is usually found in the form of high-frequency hiss.
Another limitation is the power consumption of these types of headsets. They need to be charged via a USB port or through a battery for the working of their noise cancelling capability. Their noise cancelling capability doesn’t work without power or charging.

If you want to buy a noise cancelling Bluetooth headset, you should carry out enough research about the best available headsets in order to make the best purchase. You are firmly advised to carefully check the quality of sound, comfort level and price of your selected headset.

All these things will you select a good noise cancelling Bluetooth wireless headset for a better listening experience.

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Can You Prevent Cell Phone Radiation With the Bluetube Headset and Airtube Handsfree?

For years people have been telling me that family, love and happiness are the crucial things in life…Now I realise that I can take or leave all that so long as We have this radio earpiece in the world.

Mobile phone radiation is starting to become a preferred subject among many when it comes to health. Many once thought that the idea of radiation being emitted from these products was simply an urban parable. However, after many years of systematic research, it’s been established that these telecommunication devices do, in reality, emit some level of danger – with electromagnetic radiation.

This occurs because for a user of these devices to get a signal to make a receive calls, radio signals must be there. These are broadcast using radio-frequency energy. This form of energy is a kind of radiation that is thought to be “electromagnetic”. Here, you may find out about cell telephone radiation and how it’s possible for you to duck the danger with the BlueTube Headset.

When I first learned of the complications that mobile phones could probably pose to people, I started conducting research on tactics that I could protect myself, as well as my buddies and family and friends from this danger without utterly junking these convenient devices from our lives altogether. It is then I discovered what’s known as the “airtube headset”. While this was said to be a useful cure for a few years, at last I ran across a fresh product that was called the “Blue Tube Headset”.

This device was more structurally sound and appeared to supply a higher shield level from exposure to threatening energy levels emitted from mobile phones. The team that designed this piece actually worked for more than a decade to guarantee . The product was sturdy and may be used for an extended period of time without experiencing damage. It was made with the theory of the airtube headset to mind, but it basically filtered transmissions away from the head and the ear canal. As well as this, the sound quality wasn’t influenced.

When an individual is exposed to cell telephone radiation, many things happen that may have a direct effect on the fitness of that person. First, and naturally, the exposure comes in direct contact with the head and ear area.

This power source has the potential to essentially warm the tissues ; very similar to a microwave does, when there is close contact. The following list demonstrates some of the dangerous complications of exposure to electro-magnetic radiation : Damage to the eyes an mild to dreadful headaches.

Cancers in and round the area of the brain numerous sorts of cancers exaggerated levels of fatigue
The development of Dementia and Alzheimer’s Illness. By taking a product and placing it into place as an element of your daily cell telephone use regime, you might potentially be avoiding all these difficulties, as well as other health worries that are presently being studied by health execs. Mobile Phone Radiation Prevention methods in association with the ever-popular BlueTube Headset, there are numerous other cell telephone radiation prevention methodologies.

The following details some steps that you can take to stop the quantity of exposure that you experience : try and purchase mobile phones that implement the use of a headset that is known as “hands-free”. When using the device, adjust the antenna to where it is in the fullest upright position.

When using cell telephones, it is vital to do so in spaces that are wide and open. Only use the cell phone when the signal strength is at maximum capacity. If you employ it at other times, it will work more conscientiously to acquire a signal which indicates more radio wave energy is being broadcast.

Conclusion As you can see, mobile phone radiation is a heightening concern for every one of us. Many health issues have been accredited to exposure to the radiation that these devices emit. If you would like to keep on using your cell telephone, it is critical to take some preventative measures. One of the first things that you can do is purchase the BlueTube Headset. As well as this, using the device when signal strength is at its fullest and in open spaces can be of benefit too.

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Rechargeable Walkie-Talkie – Important Facts That You Should Be Aware Of

The basis of this post is to make you consider what in life is significant and what does getting the up-to-date earpiece really signify to people

If you are in the market for new walkie-talkies, you may already know that there are lots of choices available.
If you are shopping by brand, some of the biggest names in rechargeable walkie talkies are Cobra, Motorola and Midland but these names are by no means indicated to be the extent of what is the best in terms of brand name or price. When it comes to price, the lower end of what you can expect to pay for a set is just under $70.

Many high quality rechargeable walkie-talkie sets are over $150 but is well worth every penny of the cost.
There are far too many different varieties on the market to begin a detailed analysis of them all. The common denominator among all varieties of rechargeable walkie-talkie is that they help you to stay in touch whether you are across the yard on an outdoor adventure with children or a great distance away, communicating important business information to team members.

Many models offer LCD displays and Lithium-ion rechargeable batteries in an easy to use unit that offers many hours of use before the batteries must be charged again. Some models such as the Motorola professional series, its rechargeable walkie-talkies can provide users with a radius of up to 5 miles and is capable of operating on a single charge for a total of 12 hours.

Of course, a rechargeable walkie-talkie can only last as long as the battery it is powered by. Some batteries on the market offer 26 hours of use for models that are 2-watt types and 18 hours of use for 4-watt types. You can expect to spend more for these long life batteries but if you have needs to use your rechargeable walkie-talkie for extended period of time, it is worth the investment.

There are also rechargeable walkie-talkie sets available with squelch systems that are continuously controlled by tone. There are also sets that you can purchase in adjustable wrist band styles. Not much larger than a wrist watch, these types of rechargeable radio sets will never get misplaced by laying them down and forgetting them because they are strapped to your wrist leaving your hands free for other important functions.

Great for camping, hiking or other outdoor activities that require use of both hands, you will never get lost without a means of communicating with these rechargeable radio sets on hand.
For the professional, there are many types of rechargeable radio sets that include a built-in battery, AC wall adapter, desk charger, and wide range of channels, call alert and many other features. If you are looking to make a purchase, you owe it to yourself to spend some time researching the many varieties of rechargeable walkie-talkie sets that are on the market today to learn about the functions and features they offer before making your choice.

You may be surprised to find that there are a lot more options on the market than you can ever imagine.

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When NASCAR needed a faster, more efficient communications system, they turned to Motorola.

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The Talladega Superspeedway covers 3,000 acres, and is a Super Bowl®-sized NASCAR event that attracts 150,000 on-site spectators and millions more watching at home.
NASCAR manages over 1,200 races every year on 200 race tracks in Canada, the United States, and Mexico, and each location poses its own challenges in terms of radio traffic and interference. These challenges are magnified when systems must be deployed quickly, every week, over a wide geographic area. Pit crews, drivers, officials, and all other members of the internal and external organization must have a communications system that supports flawless connections, every time. When seconds count, there is no room for missed or delayed communications; speed and voice clarity are everything. NASCAR recently realized that their older system was just not keeping up, and there’s no doubt that providing secure and reliable communications for an event like this can seem overwhelming. Each NASCAR event involves up to 40,000 people, with approximately 80 officials presiding over two races, each with 43 cars, and each with teams of up to 30 people. In addition to NASCAR drivers, maintenance personnel, and pit crews, each race requires spotters, timing and scoring groups, as well as fire and rescue units. Also working on-site are emergency personnel, food vendors, ticketing and parking attendants, television and radio crews, and public relations representatives. Because NASCAR stages many regional events, several outside organizations need to be integrated into the communications loop. The sheer number of radios and talk groups that have to be moved and set up very quickly is enough to tax any radio system, and NASCAR’s old system was clearly over-taxed. NASCAR examined all options during a six-month intensive study. Digital radio seemed to be the best route to achieving the key requirements surfaced in this study, which included NASCAR’s need to:

• Coordinate large numbers of radios
• Ensure absolute audio clarity
• Maintain consistent, reliable communications
• Have a radio that was durable enough to withstand a rough environment

After assessing all the options, NASCAR determined that Motorola’s MOTOTRBO professional digital two-way radio was the right system for their needs.MOTOTRBO digital radio precisely met each of

NASCAR’s four requirements.
To coordinate large numbers of radios, the MOTOTRBO system is engineered to maximize use of the radio spectrum. The power of MOTOTRBO is leveraged by NASCAR to bring together multiple talk groups who work all over the property and need to be in full communication at all times. MOTOTRBO is also used to connect spotters, emergency medical technicians, crews in the garage and pit areas, as well as security and all other service and support personnel required to help each race run smoothly.

MOTOTRBO’s ability to work in either digital or analog mode makes it possible to seamlessly integrate older radio systems that may not yet have migrated to digital. To ensure absolute audio clarity, MOTOTRBO’s noise-canceling technology enables headsets for racing officials to perform at higher levels. Added to inherently clearer digital communications, the noise-canceling capabilities of MOTOTRBO technology supports sharp and clean communications in even the harshest environments. If MOTOTRBO users can communicate clearly at a noisy racetrack, it’s easy to see how well these digital two-way radios would perform in most workplace environments. “ We have to make sure we’re communicating quickly and concisely. Through MOTOTRBO, we’re able to do our jobs a whole lot better
than we have in the past.”

To maintain consistent, reliable communications, MOTOTRBO’s digital technology makes possible extended battery life so that all users can easily connect throughout an 8-to-12-hour workday and then keep communicating, even when races run longer than scheduled. The MOTOTRBO system is
also less susceptible to static and interference, and when second-by-second communication is demanded, digital provides the proven reliability NASCAR needs. Durability is ensured with MOTOTRBO radios that deliver the highest quality of communications, even in harsh environments where they’re frequently dropped and exposed to dust, rain, grease, oil, and solvents. MOTOTRBO is designed to meet U.S. Military Standards C, D, E, and F, as well as IP57 for submersibility in water. When properly equipped with a Motorola FM-approved battery, MOTOTRBO radios have been certified by FM Approvals in accordance with Canada and U.S. codes to be intrinsically safe.

Source – http://www.motorolasolutions.com/web/Business/Product%20Lines/MOTOTrbo/_Documents/Case_Studies/Static_Files/Events_Nascar_car_racing.pdf

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Glyph: Headset from Avegant beams video into your eyes

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audioForget about the big screen, the small screen and even the second screen.

A headset due to be released this year promises to beam movies, video games or even video calls directly into your eyeballs.

Yes. The Glyph headset, from Ann Arbor, Michigan-based Avegant, will create visuals that don’t need a screen — just your retinas and your brain.

If that conjures up exciting images of living like “Star Trek’s” Geordi La Forge or Cyclops from “The X Men,” you’re not alone.

A Kickstarter campaign was launched last month and set out to raise $250,000 to bankroll the project. It blew past that mark with ease and, with half a month left, was on the verge of breaking the $1 million mark Wednesday.

“We knew we had something really cool and that we’d do well on Kickstarter, but nobody thought we’d hit our goal in less than four hours,” said Edward Tang, Avegant’s CEO. “It’s like ordering flowers for your girlfriend and they show up with a whole truck full of flowers.”

The technology that powers the Glyph centers around a set of 2 million microscopic mirrors — 1 million per eye — that reflect visuals, including 3-D, into the user’s eye.

Unlike some entries into the emerging wearable tech field, the Glyph won’t be limited to a set of specially designed apps. Tang said the headset, which donors can receive for a $499 “donation” to the campaign, is designed to plug into just about anything you own that has a screen — be it a smartphone, laptop, television or gaming console.

Users would play the video content on their mobile or entertainment device but watch it on the Glyph instead of their device’s screen. The Glyph has a battery life of about three hours, Tang said.

“I think Google Glass is really interesting … (but) I think it’s a couple years away,” he said. “If you ask people what they’re doing with their devices today, they’re streaming Netflix, they’re playing video games and they’re listening to music. We created a device that really focused on those aspects.”

The startup also wanted to avoid the “Glasshole” effect. Google promises Glass will be stylish when it’s released to the public, but the look of early test versions has been distracting to some and downright jarring to others.

Glyph, on the other hand, looks like a pair of headphones sitting on the user’s head when not in use. In fact, it doubles as a pair of high-end headphones with noise canceling that compares with some of the leading brands on the market, according to Avegant. To add visuals, the user flips down the band over their head, making it an eyepiece.

The company has opened the headset to outside developers, who they hope will find unexpected uses for its features, which include head-tracking technology.

“By giving developers this brand new tool box, they start to think of amazing applications that we couldn’t in our wildest dreams come up with,” Tang said.

But, wait. Mom always said not to sit too close to the TV set. And we all know that bleary-eyed feeling we get from staring at a smartphone or tablet for too long. Won’t this be worse?

Quite the opposite, Tang said.

He said eye fatigue comes from staring at the artificial, pixelated light from our screens. Remove the screen, remove the problem.

“We agree with the moms of the world,” he said. “What we’re doing is mimicking the actual light around you … . It’s the kind of light that your eyes have been conditioned to see, have evolved to see.”

It’s all so magically futuristic sounding. Which raises an obvious question: Is Glyph all hype?

Folks who have taken an early look don’t think so. At January’s International Consumer Electronics Show in Las Vegas, Glyph was one of 40 products chosen for the Editor’s Choice Award. More than 3,200 exhibitors attended the show.

“What I could tell was that the projected image, just like my last time with Avegant’s virtual retinal display tech, was exceedingly bright and vivid, lacking any sense of pixelation,” CNET’s Scott Stein wrote from CES. “A deep-sea 3-D movie looked like it was projected in a tiny little movie theater in front of my eyes.”

David Pierce wrote for The Verge: ” ‘Life of Pi’ displayed perfectly in 3-D without any tweaking, and I played ‘Call of Duty: Ghosts’ right off a PlayStation 3. All you need to do is to tune the glasses — you focus each eye individually, then set the two eyeholes the right distance apart so they create a single picture. From then on, content just works.”

The Kickstarter campaign runs through February 21. Avegant plans to ship units to donors by the end of the year and says the model that will ship will be smaller and lighter than the test models on display.

Avegant is based in the heart of Michigan’s manufacturing region and hopes to manufacture the Glyph as much as possible in the United States, Tang said.