The good old walkie talkie will still have a place in most businesses, but Motorola being a technology company they are always innovating, they are underpinning their future communications on data, currently date networks cannot cope with this but as the technology grows, Motorola will be able to produce handsets, motorola accessories and communications that will seamlessly use this without any problem, we look forward to the future.Â
Motorola Solutions CTO Paul Steinberg explains how data and enhanced communications can make cities safer â even if theyâre not smart just yet
As CTO of Motorola Solutions (MSI), Paul Steinberg says he has three broad remits.
The first is to advance the companyâs technology with his team of engineers and data scientists, the second is to drive its patent strategy (âWhat patents we get and what we do with themâ) and the third is to invest in startups so MSI can get access to something it doesnât have.
âIt keeps you humble because thereâs always someone else doing things faster and better than you,â he tellsÂ TechWeekEurope.
Motorola Solutions now only deals with public safety communications systems. It was spun off from the Motorola Mobility handset business that was sold to Google (and later Lenovo) in 2011 and sold itsÂ handheld computing division to Zebra Technologies in 2014.
This might seem like a very narrow focus but itâs a market in which the present day Motorola senses a great opportunity as emergency services update their infrastructure to improve service and cut cost.
In the UK, MSI is working withÂ EE to help deliver the Â£1 billion Emergency Services Network (ESN) â a 4G platform that will allow for data-enabled services alongside critical communications â and save the government Â£1 million a day
These upgrades will power what MSI sees as the big trend in public safety: the coupling of communications with data analytics, a vision it recently outlined at Critical Communications World (CCW) in Amsterdam.
â[Mission critical communications are] every bit as important as they have been and we expect [them] to be tomorrow,â explains Steinberg.
âMission critical intelligence brings in connecting things â data. It becomes more about context and situational awareness. The investments weâre making are more in that direction.
âOne of the things weâve been working on is the connected first responder. What we did was we built a context engine thatâs at the heart.â
The âcontext engineâ built by MSI brings together various different inputs. For example, Bluetooth connectivity can unite weapons, body sensors and imaging equipment to give a police force a greater overview of a situation.
Steinberg explains a scenario where if the context engine detects a weapon has been fired and a policeman is not at a station or at a firing range, their video camera will automatically switch on. Other situations could give a paramedic of firefighter additional information, possibly through wearable technology.
âWhy did we do the Context engine? âEyes open, hands freeâ: keep focussed on what youâre doing and keep your hands available to do what you need to do,â saidÂ Steinberg.
âWe envisage this working as an ecosystem with well-designed interfaces around the core context engine. We see ecosystem partners offering applications and hardware. And some pieces of those we will offer as Motorola. We see it increasingly as a software problem.â
Steinberg favours acquisitions as a way of advancing his goals and MSI has venture capital operations to fund the third part of his remit. MSI monitors the development of numerous early stage companies with a view to boosting its own business.
â[Takeovers] give us technology or a skillset that we canât do properly [ourselves],â he explains. âIf the concept looks like it has legs, thatâs when we make the decision. In some cases we donât proceed.â
Sometimes the target is more established.Â MSI has bought Airwave for Â£817 million, a move which it is believed will help accelerate the transition to next generation systems. Airwave currently powers the pre-ESN communications capability of the UK emergency services and Steinberg sees the acquisition as a method to migrate customers rather than innovate.
âIt brings us another data point but it doesnât really change how my team works,â he says. âItâs a company that helps us ensure we have an orderly migration.â
Smart cities and smart vehicles
MSI says the Context Engine and its vision of data-supported communications will be strengthened by theÂ parallel development of smart cities;Â even if itâs too early to have any impact right now. Steinberg describes âshotspotterâ technology capable of detecting when and where a gunshot is fired, aiding emergency services, and believes smart cars will also play a role.
âI think as the city becomes smarter, we can benefit from the environment,â he predicts. âWe can fuse that together and help facilitate real time decision making. The next mobile platform is the vehicle. I think that will create some interesting opportunities for us.â
But the very nature of emergency services means technological jumps are not to be taken lightly. A technical hiccup can mean the matter between life and death and although political reasons might have delayed the transition to LTE, concerns about reliability will have played a role too.
Steinberg agrees and is adamant that no matter what advances are made, MSI will not jeopardise the basics.
âThe foundation of our business is communications and it always will be,â he states. âMaking sure our platform is resilient, usable and mission critical in harsh environments while layering on this intelligence.â
Read more at http://www.techweekeurope.co.uk/networks/broadband/motorola-solutions-public-safety-data-197830/2
We call these Remote Speaker Mics (RSM) and they have come in all different shapes and sizes over the years. Normally a staple of the emergency services, but we have seen a upsurge in general radio users using RSMâs. So it comes as no shock to us that a pro-active company like Imtradex has designed one to suit the needs of the masses.
What was originally developed as a handheld microphone for digital radios, has blossomed over the past few years to an essential equipment accessory for digital radio standards of emergency service: The Aurelis hand microphone from Imtradex.
Meanwhile with the Aurelis, the specialist for critical communications, have a whole series of hand microphones on the market, all adapted to the specific challenges of the communication in critical applications of security agencies, fire departments, dispatch and emergency services. The Aurelis series addresses the different needs of the user: based of the basic model Aurelis Base, Imtradex manufacture customized versions that are specially tailored to the range of functions that meet the customerâs requirements.
All the Aurelis hand microphones have a send button, a microphone and high quality speakers. âAll devices contain a cable attachment and also the possibility to connect external audio accessoriesâ adds Ralf Kudernak, CEO of Imtradex. Depending on the radio, different data applications can be integrated, so can ex. on the model Aurelis AudioDis, information be displayed on the LCD display.
âThe youngest member of the family is the Aurelis USB handheld microphone, which is designed for connection to computer-based communication system, especially for control centersâ informed Ralf Kudernak. âThe USB interface gives the easy integration and can be connected independently to each operation system and used with existing hardware. With the development of the Aurelis USB, we followed the desire of several control centers, which wanted to use a handheld microphone which you can also hang at the table of the workplaceâ said Kudernak.
In terms of digital communication, security and flexibility the innovative ultra-lightweight Aurelis Nexus PTT set new standards. It was specially designed for fire fighting. Thanks to it extra large PTT, with short sensing path and exactly defined pressure point, the operation with use of working gloves is possible.
The user can also be flexible in their choice of radio and headset: All Aurelis handheld microphones can be combined, not only with many headsets, for example with the monaural neckband headset from the NB Series. They are convenient and safe to wear, provide a maximum safe mobility and provide an excellent voice quality. Imtradex can also build them with the different connectors required, so they can easily be connected to different digital radios. All Aurelis handheld microphones have a robust plastic housing. Is splash-proofed and protects the device against dust and against temperature influences, so they can be reliably used in a temperature range from -30 to + 70 degrees Celsius. The 180 gram lightweight Aurelis handheld microphones are also available in different colours and optionally equipped with a car holder or cloth clip.
– See more at: http://www.tetra-applications.com/33213/
The IC-M93D EURO VHF/DSC handheld radio is the successor to the popular IC-M91D. Stylish and slim, this new Icom handheld contains an abundance of features including a dedicated built-in DSC receiver (meets ITU-R M.493-13 Class D DSC), internal GPS and active noise cancelling technology. In addition, an intuitive interface coupled with 2.3 inch full dot matrix high-contrast display and soft keypad makes this a comfortable and easy handportable to operate.
The IC-M93D EURO has an integrated DSC/GPS giving users the facility to send and receive DSC calls. A dedicated DSC receiver continuously monitors CH70 and is independent of the main receiver and other operation. Other important safety at sea offerings include a built-in compass, navigation and Man Over Board features.
Advanced noise cancelling technology on the radio reduces background noise by up to 90 percent on both outgoing and incoming calls making sure your communications are heard. The IC-M93D EURO come as standard with the BC-220 rapid charger which charges the standard Li-ion battery pack in just 2.5 hours. The handheld’s extended 1500mAh Li-Ion battery life provides a full day of use.
The IC-M93D EURO features Icom’s exclusive Float’n Flash and AquaQuake technology. Should the radio be dropped overboard, a flashing light will activate, making it easier to locate. The Float’n Flash feature works regardless of whether the power is turned on. The AquaQuake draining function uses low-frequency sound waves to clear water away from the radio’s speaker grill for clear audio.
Additional radio features include the IPX7 waterproof rating, 50 waypoint memories with alphanumeric names for navigation and a loud speaker.
Ian Lockyer, Marketing Manager of Icom UK, said: ‘The IC-M93D EURO combines advanced safety features with an intuitive user interface for faster and easier access to all the radio functions.’
The IC-M93D is now available to buy from authorised Icom Marine Dealers with a suggested retail price of Â£349.95 including VAT.
We take it for granted that when we move around the country our mobile phones connect to the nearest mast, or we go abroad and our phones automatically connect to the network, with tetra, this is not as easy, but this article is about a test that Sepura completed connecting two TETRA networks in Norway and Sweden, interesting stuff.
Sepura radios have successfully participated in interoperability trials for the worldâs first cross-border TETRA communication system, linking RAKEL and NÃ¸dnett, Sweden and Norwayâs public safety networks.
More than 350 first responders were involved in the trials, which took place in MerÃ¥ker, close to the Swedish border, in a crisis response exercise involving public safety users from both countries.
The cross-border system utilises TETRA Inter-System Interface (ISI) functionality to connect networks together, effectively allowing users to roam to another network. This allows first responders to use their radios in both countries â vital for smooth collaboration in emergency situations.
The initiative to strengthen co-operation between national emergency services started in 2013 with the EU-funded Inter-System Interoperability project, designed to improve the ability to respond to natural disasters and security threats. The RAKEL and NÃ¸dnett networks are scheduled to be ready for bi-national operational use in early 2017.
Sepuraâs STP9000 hand-portable radios and SRG3900 mobile radios were used by both Swedish and Norwegian emergency services during the exercise, although all Sepura radios â including the new flagship SC20 range â meet the technical requirements of the ISI system.
âThis is one of the most advanced multinational radio communication projects in Europe,â said Tariq Haque, Product Manager for Sepura.
âAfter two yearsâ development, bi-national interoperability has become a reality, bringing cross-border mission critical communications to Sweden and Norway.
âWe are extremely pleased to have played a part in this ground-breaking event.â
Source – http://www.tetra-applications.com/33643/news/sepura-contributes-to-success-of-world-s-first-cross-border-tetra-system
A Walkie Talkie is a handheld receiver or portable radio. Walkie talkies come in a pair and they communicate quietly with one another using radio waves, on a single shared frequency band.
Almost all of us grew up with walkie talkies. As children, and especially before the age of mobile phones and technology, we all had a pair and played with them in our gardens.
Walkie talkies have made a comeback. Or maybe they never really went out of style but now theyâre sophisticated.
Each unit is battery powered and has an antenna for sending and receiving radio wave message. There is a transmitter / receiver and a loudspeaker. The loudspeaker doubles up as a microphone. There is a button that you push to talk, pretty much the same way that an intercom works. Some more sophisticated walkie talkies have separate loudspeakers and microphones; it just depends on what you need the walkie talkie for.
Walkie Talkies with noise cancelling headsets
Technology has changed so much and become so much more sophisticated. In the old days, think of the crackles that came with walkie talkies. It was often very difficult to hear what the other person was saying. But a pair of noise cancelling walkie talkie headsets will reduce or remove any unwanted sounds by using active noise control. Note that this is very different from passive headphones which use technique such as soundproofing. Noise cancelling is not soundproofing.
Our worlds are busy and we become bombarded and overwhelmed by everything around us. We need to listen to some things, but we want to cut out others. Noise Cancelling allows us to do this, while still allowing us to listen to the things we want to listen to at the volume we want them.
Pros of a walkie talkie headset?
Remember when we used to listen to music really loud so we could block out all the other external noise? You don’t need to do this anymore. walkie talkie headsets will block out most excess or excessive sound, or the ones you want blocked out anyway. You can now listen to your music at the volume you want, which does not need to be crazy, and the other external sounds (baby crying, man snoring next to you) will be blocked out anyway. Finally, you can listen to and enjoy music in the way you want to enjoy it, at a natural volume. You can hear the fabulous music, have a rich listening experience, and still not be disturbed by chatter around you.
Noise cancelling headphones are fabulous for when you travel or commute. You may be the kind of person who gets on a plane and train and chats to everyone around you. But you may be more solitary and want to sit down and zone out. You can do this easily with a walkie talkie headset. The beauty is that on a plane you wonât hear the noise of the aircraft or its passengers, but you will still hear the safety announcements.
Itâs really easy to work in a noisy environment with noise cancelling headphones. You can focus easily without being disturbed and can make use of any space, productively. You can even go and study your history while at a party or in a restaurant. It is also a good idea to use them at home, while studying for exams or so; they cut out the excess noise and you can focus totally on your work.
Students used to turn up the volume of their earphones in order to cut out the outside worldâ. But with a walkie talkie headset they are finding it is easier to study when music is at a lower volume and when the outside distractions have been eliminated.
Cons to noise cancelling headphones?
There are always cons to everything. Some parents may say they would prefer no headphones at all. They like their children to be available and to engage more and talk more, but we know this is the way of the world. Everyone uses headphones; parents included/ Use them in moderation of course, but still be sociable and take time out in the day, be headphone free, and engage.
Noise cancelling headphones are not very cheap and are in fact possibly even ten times more expensive than ordinary headphones. However, like anything that costs money, they will last for a long time and are super reliable. They may cost more money but will ultimately give a much better noise-free experience.
Lots of research has gone into the design of these special noise cancelling headphones. Each set consists of inner components that cancel out the disturbing external sounds. Ordinary headphones do not have these components, i.e., you cannot cut out the outside sounds. It is quite obvious then, why noise cancelling headphones are more expensive.
These internal components also use up a lot of power. The power can come from internal replaceable batteries or they can be rechargeable. The walkie talkie headset that carry their own power supply means they are heavier than ordinary headphones. Not all sets carry their own power supply. The ones that are rechargeable are lighter, but they can drain the devices they need to plug into for power.
The quality of sound when using a noise cancelling walkie talkie headset can be compromised. It is unusual though and it is only the most sensitive of ears that would pick this up. There have been very few complaints of a tinny almost mechanical sound, but these complaints are few and far between.
Not all , although we did mention this under pros as well. It is never possible to cancel out all external sounds, but we still need to be able to hear police sirens, pilot announcements or the high pitched screaming of your next door neighbor. All every day external sounds though are muffled and definitely much quieter, and the sounds that you don’t need to hear, are gone.
Hytera are truly making huge waves in the two way radio market and thisÂ acquisitionÂ on Motorolas home turf is remarkable. An insider has told us that this tender was won through a lot of hard work and attention to detail. Hytera are growing rapidly, we have heard from one source at EarpieceOnline.co.uk that their Hytera radio earpieces are out selling theirÂ MotorolaÂ equivalentsÂ this year.
The Professional Mobile Radio expert from Germany, Hytera Mobilfunk GmbH, is awarded with the tender to supply EU delegations worldwide with radio communication networks based on multiple technologies.
Hytera Mobilfunk GmbH confirms the successful conclusion of the negotiations with the European External Action Service (EEAS) over a framework contract for radio communication networks in EU delegations.
The contract is to run for the next four years and implies a supply of multiple critical communications systems, for local and long distance communications. Next to that, Hytera will also be responsible for the installation, updating, replacement, repair and maintenance of those networks. Additionally there will be a technical support for the EU delegations and headquarters of the EEAS.
Matthias Klausing, CEO of Hytera Mobilfunk in Germany âIÂ´m proud and honoured by the trust the EEAS puts in us as a company. And IÂ´m looking forward to a good and constructive cooperation.â
– See more at: http://www.tetra-applications.com/33031/news/hytera-to-supply-critical-communication-systems-to-eu-delegations-worldwide#sthash.I1P9dSt1.dpuf
This is an excellent story about how hearing protection is sometimes be essential, and when youâre on the shooting range it has to be vital. But it is important to get the right set of headphones that will protect your hearing sufficiently. Lessons can be learnt from this excellent case study.
There is no doubt that we all take our senses of sight, smell, and hearing for granted as long as we are strong and healthy and everything is working well. When we are young we tend to believe that we are indestructible and readily adopt the idea that âit will never happen to me.â Consequently, we can develop some bad habits and be a little loose when it comes to preventative measures for almost anything.
I know because that was my attitude at thirty years old when my eye doctor made a comment in passing that my eyes were perfect, but the chances are I would be needing reading glasses by the time I was 50. I scoffed, but you could almost have set your watch by it because by the time I was in my late 40âs my arms started to get shorter when it came to reading, tying on fishing lures and other things that required scrutiny up close. At 50 I was wearing reading glasses.
Growing up I never bothered too much about wearing ear protection. When I was plinking it was with a .22 rifle that only put out a little noise if you were the shooter so the thought of hearing protections seemed ludicrous. When hunting I do not know if I have ever heard my firearm discharge and beside that unless I was dove hunting I seldom shot too many shots anyway.
The change of heart came when I started shooting on an indoor range, while in the Air Force. I noticed after shooting a few rounds with my .22 caliber, Ruger Single Six that my ears would ring for a while afterward. One night a grizzled old Master Sargent suggested I wear ear protectors or take a chance of damaging my hearing. I took the recommendation to heart and have been wearing them ever since. The result has been that after many years of shooting .22âs, large caliber handguns, rifles and shotguns my hearing is still intact and working well.
Shooting is not the only activity that can cause hearing problem as any loud noise can damage your hearing. The intense vibration caused by loud noises can injure or destroy the hair cells inside the cochlea, so they no longer function to transmit nerve impulses to the brain. If that happens, you will experience hearing changes.
Hearing protection is needed anytime one is exposed to sounds above 80 decibels (dB). Normal human conversation runs about 30 to 35 dB. At its peak level, the sound of a 12-gauge shotgun is about 140 dB. 9mm runs around 159 dB and a .38 special with a six-inch barrel is about 156 dB, a .22 LR pistol with the same length barrel 140, an M-16 is about 154, a .45 ACP pistol is 155, and a .357 Magnum revolver is 164. All of them are around double the safe sound level. Just to be on the safe side I used to wear muff type hearing protectors and usually ear plugs also when on the range.
For range use today there is an array of muff style hearing protectors. The new style that I now use have not only hearing protection, but also hearing enhancement. The controls on each ear can be tuned to match your individual optimum hearing and increase the volume up to eight times normal. So when the range master gives a command or when you are speaking with a companion on the shooting line you can speak in a normal voice and hear them as well or better than without the power muffs. Yet when you shoot the sound activated compression circuit reduces the sound from the shot to a noise reduction rate of 24dB.
This is very important on a shooting range because I have missed range commands in the past from the range master simply because I could not hear them through my hearing protection.
The new muffs I use are from Walkerâs but they offer many other styles in their Game Ear series. These are unlike the muff style protectors as the bulk of the unit fits behind your ear with an earpiece that fits inside your ear, the unit weighs less than one fourth of an ounce and can be used with or without glasses. These too can be fine-tuned to your specific hearing, allow you to turn the volume up to magnify sounds from five to seven times and still reduce the sound of the shots to a rating of 29dB.
The ability to custom tune the devise to your hearing as well as adjust the volume up on these models will enable the hunter to more readily pickup games sounds in the woods. Sounds like a squirrel jumping through the trees or when their belly slaps a tree when they jump from one to another. It will help the hunter pick up the minutest sound of a deer brushing by limbs or the whisper of them walking through leaves or disturbing a rock.
So now there is really no acceptable reason not to wear hearing protector and if you get a good set it may even enhance your chances of bagging some more game.
SO youâre walking down the street and suddenly the music kicks in, you drop to the ground and pull your earphones out of your ears! âwhat just happenedâ you think, then you realise the un-pause on the mp3 has just kicked in and you forgot to turn it down. Well people this will be a problem of the past with these earphones, Now all I need them to do is make coffee. VERY IMPORTAN You can find the original article here
Whatâs been your favorite set this weekend? Or the best new track youâve shared with all of your friends? Well take that track and imagine listening to it in exactly the way your ears want you to.
Meet theÂ EvenÂ earphones, who tune themselves to each personâs particular hearing. At just under $100, they customize the sounds they play to suit your own audio needs. They use their own EarPrint technology that measures how you hear different frequencies, then sets the earphones toÂ play back sound specifically for each ear. As a result, theÂ headphones give you aÂ profile tuned to your own ear (each ear with its own profile).
One of the biggest things that originally drew me to the earphones was the fact that they are not a pre-order campaign â they have physical earbuds available now. The company, whoÂ launched in in June, has sold out batches twice thus far and are continuing to take orders on their website. Luckily, I was able to get my hands on a pair to try out as well.
Iâm pretty picky about the gadgetsÂ I use for audio, as Iâm constantly listening to music â digging for new sets on Soundcloud, reviewing new tracks, jamming outÂ in my own world. Being able to plug in and listen to my own musicÂ isÂ what allows me to focus and, as a result, Iâm very specific about the type of earphones or headphonesÂ I use. That being said, I was overly ecstatic when I was handed a pair of Even earphones to try out.
First, their appearance: the cords are aÂ high-quality string that have a smooth look and feel. The budsÂ look sleek, with a simple black-and-white color scheme â one black, one white, with the EarPrint device hanging at the middle of the cord, meant to dangle at your chest. They donât tangle easily, which makes them easier to carry without having to worry about dealing with knots. Theyâre the type of earphones I wouldnât mind wearing out in public.
Next: the sound test. This is where we meet âSarah,â the soothing female voice that guides you through a number of sounds to test where your hearing level is at. This test was very straightforward â Sarah literally starts by saying âHi, this is really easyâ â and felt very conversational as sheÂ talked you through each noise. Five pieces of music are played for each ear, and youâre required to hit the button once you hear the sound. Though the process takes a little bit longer than Iâd like, itâs seamless.
Overall quality of the listening experience was great. I switched between my Bose over-ear headphones and the Even earphones to test the difference in sound quality and worked to try a few subgenres of electronic music to see how each would sound between both pairs. I started off by listening toÂ Louis The Childâs set from Lollapalooza this yearÂ and instantly found that the vocals were much more emphasized than in my Bose headphones. Next, I moved on toÂ Mikey Lionâs live set from Desert Hearts 2016Â andÂ lovedÂ the emphasis on the bass I was hearing â the Even earphones made it much more of an all-around experience. I then switched over to Troyboiâs tracksÂ Do You?Â andÂ O.G.Â to continue to test this bass theory and, again, Even delivered.
As my hearing is likely damaged based on the amount of festivals and shows Iâve attended over my lifetime, it was much appreciated that the earphones were able to pick up on the frequencies I have more trouble hearing to create the full experience tracks deserve. Interestingly enough, every time I switched back to my Bose headphones to compare, I had to turn the volume down because it came at full blast and was overwhelming â and, when I did, the clarity between vocals and bass was lost. All in all, these babies pack a punch with their sound quality when it comes to electronic music.
Itâs refreshing that these earphonesÂ donât require using an app, since that seems so commonplace nowadays. All of the information that goes into your profile is saved in the little box hanging onto the string, so you can plug them into any device â phone, laptop, iPod, whatever you want â and still have your own profile saved. I found this extremelyÂ helpful, as it meant that I donât have to re-adjust my volume based on what device Iâm using. Beyond that, itâs a refreshing change from listening to sets with friends and having to change the volume based on everyoneâs sensitivities. It makes listening much simpler and, quite frankly, electronic music better. How could you say no to a custom-made, surround-sound system in your own ears?
To get you started, here a few sets, old and new, you may enjoy listening to in the earphones (ok, to be fair, these are sets thatÂ IÂ would want to hear in them):
We all know how important radio communications are and at a time before the internet and even digital communications, governments relied on RF communications that were susceptible to the suns solar storms, if you add that to the cold war nuclear tensions then we could all be living in holes now.
Cold War history isÂ rife with close callsÂ that nearly led to nuclear holocaust.
In September 1983, for example, sunlight reflecting off a patch of clouds fooled a Soviet missile-warning system into detecting the launch of five US intercontinental ballistic missiles that never were. A wary colonel in a bunker ignored the alarm onÂ a 50/50 hunch.
Two months later, US forces staged “Able Archer 83” â a massive nuclear-strike drill on the doorstep of the USSR. Soviet commanders panicked at the show of force and nearly bathed America in thermonuclear energy. Once again, an act of human doubtÂ saved the planet.
Now scientists have one more hair-raising event to add to the books:Â The “Great Storm” of May 1967.
“The storm made its initial mark with a colossal solar radio burst causing radio interference … and near-simultaneous disruptions of dayside radio communication,” a group of atmospheric scientists and military weather service personnel wrote in a new study, published August 9 in the journalSpace Weather.
Hours later, high frequency communications dropped out nearÂ US military installations in and near the ArcticÂ â one of the closest places to station nuclear weapons and launch them at a Cold War-era Soviet Union.
“Such an intense, never-before-observed solar radio burst was interpreted as jamming,” the study authors wrote. “Cold War military commanders viewed full scale jamming of surveillance sensors as a potential act of war.”
A ‘Great Storm’
Earth’s magnetic field protects life on the planet by corralling the sun’s high-energy particles toward the planet’s polar regions.
If the sun happens to launch a cloud of solar particles directly toward Earth during a violent outburst, called a coronal mass ejection, it can triggerÂ powerful geomagnetic storms.
This not only leads to beautiful auroras, but can also scramble wireless communications and disrupt radar systems.
While The Washington Post wrote up a story about the storm as “City Gets Rare Look at Northern Lights,” top US military commanders sounded the alarms in secret.
The Air Weather Service (AWS) â a relatively new branch of the Air Force â had warned military leadership about the possibility of a solar storm, but US commanders believed the Soviet forces were jammingÂ NORADÂ systems designed to detect threatening planes and missiles.
As the Strategic Air Command warmed up the engines of bombers and taxied toward the runway, the decision to go airborne may have been kicked all the way up to the “highest levels of government,” possibly involving President Lyndon B. Johnson.
“Just in time, military space weather forecasters conveyed information about the solar storm’s potential to disrupt radar and radio communications,” according to aÂ press release from the American Geophysical Union. “The planes remained on the ground and the U.S. avoided a potential nuclear weapon exchange with the Soviet Union.”
And this all happened at the peak of nuclear armament â when aÂ record 31,255 nuclear weapons were deployedÂ around the world. (Today there are roughly 7,200Â nuclear armamentsÂ at hand.)
“Had it not been for the fact that we had invested very early on in solar and geomagnetic storm observations and forecasting, the impact [of the storm] likely would have been much greater,” study leader and UCAR atmospheric scientist Delores Knipp said in the release.
After the near miss, the researchers say the military learned to listen to its space weather forecasters, improve its abilities to see another looming “Great Storm,” and avert the first and perhaps final global nuclear exchange.
Find the original source here
Closed Back Headphones vs. Open-back Headphones
Open-back headphones have pads which rest on the outer ear. They’re designed such that the outer shell of the ear cup has perforations usually with horizontal cutouts. The Open back headphones design of the ear cup enhances better natural sound because of less coloration as compared to the Closed back headphones.
Closed back headphones have much larger earpads which encircle the ears. They are designed such that there’s a big pad which cups the ears, and it features an insulated outer shell of plastic which covers the ears. The Closed back headphones actually have a very solid outer shell which doesn’t have any sort of perforations such that the outer shell effectively cups/encircles the entire ear. The Closed back headphones are excellent at isolating noise. They block most of the ambient noise, but they’ve a smaller sound stage, which gives the user the perception that the audio/sound is originating from within their head. Closed back headphones also tend to produce much stronger low frequencies as compared to Open back headphones.
Low Impedance vs High Impedance
Headphones normally come in various different impedance levels, such as 8 ohms, 16 ohms and 32 ohms. The power that’s supplied by an audio source may be at varying levels because of a variety of factors including being limited because of being battery powered. Generally, as the impedance of the headphones increases, much more voltage will be required in order to drive it, and the audio loudness of headphones for a particular voltage decreases.
The determination of impedance is usually disregarded by many headphone buyers, however, the truth is it’s one of the most important factors to consider when choosing the best headphones for your particular needs. Impedance is basically just how much power the headphones can put out so that it can overcome resistance to move the headphones’ diaphragm.
Low impedance headphones (that is, less than 25 ohm), usually require little power in order to deliver high audio levels. Low Impedance headphones play well with devices which have weak amplification. These can include; mobile phones, portable music players and various other portable devices. This type of headphones can be used at home and also while jogging with your mobile phone; this is one of the reasons why most of the on-, in-, and over the ear headphones, are low impedance. Low impedance headphones are normally designed to get plugged directly in to a single (one) source, and generates sound more efficiently from a lower level input signal. This headphones tend to be much louder and much more efficient, however, they will also require a much more capable amplifier.
High impedance headphones (25 ohms and above), generally require more power in order to deliver high audio levels. As a result, they’re protected from damages caused by overloading. High impedance headphones are typically designed for studio like applications where there might be multiple phones/devices wired in parallel and receiving input signals from a single source. High impedance headphones are more tolerant of the amplifier limitations, however, they will produce less volume for a particular output level. They are also a little more durable (that is, electronically), however, they require much higher signal levels in order to produce the same level of output level of the low impedance headphones. This type of headphones can be used with a wider range of audio equipment.
Passive Headphones vs. Active Headphones
Passive (noise cancelling) headphones are made of materials which help in blocking out sound waves from the surrounding environment. The same way ear muffs soften the outside noise, so does this type of headphones employ passive noise canceling. This type of headphones are typically used for both professional mixing and monitoring, like in broadcast and recording studios, and such other applications. Passive headphones are basically designed to playback music/audio true to the actual original recording, with minimal, compression, EQ, and such other sound enhancements.
On the other hand, Active headphones use batteries in order to power the built in Digital Signal Processing (also abbreviated as DSP) technology which processes play back for a particular reason, for example, to enhance the bass and the high end. Due to the enhancement of playbacks with sharper high ends and more bass, active headphones are more popular for general listening and listening to music for pleasure. Active noise cancelling headphones are also made of materials which help in blocking out outside noise, however, they take things a step further by making their very own sound waves; the sound waves created mimic the outside noises, but are a mirror image of each other, thus cancels each other out.
Wired Headphones Vs Wireless Headphones
When choosing a pair of headphones, deciding between wireless vs. wired is among one of the most overlooked factors. Wireless headphones might be a more popular choice, however, the wired headphones also have their own set of benefits. Well, that being said, as a general rule of thumb, between wireless headphones and wired headphones, assuming a similar price between the models; the wired headphones usually offer a much better quality. Also, the audio quality may get compromised over Bluetooth.
You can opt for the wireless headphones if you are not much of an audiophile, and you tend to travel a lot. If you really don’t like getting the cables of your headphones getting tangled, or caught while listening to music/audio, then the choice should be rather simple; go for wireless headphones.
You can opt for the wired headphones if you are an audiophile, and you do not necessarily bother with the wireless options unless absolutely essential like using them when traveling, or keeping the headphones as a backup. As aforementioned, the wired headphones are way ahead in terms of output quality as compared to the wireless headphones. You will never have to worry about running out of batteries, unless you happen to opt for wired headphones which cancel noise. In addition, you will never suffer from interference from the other commonly used wireless electronic devices. However, you will need to take good care of the wired headphone cables, or they will eventually break.