How Bluetooth Works? Complete Information About Bluetooth


 How Bluetooth Works?

How Bluetooth Works?


 I can choose what songs to listen to!” Fast-forward “a few” years later, and I’m using Bluetooth to play music from my phone through my car speakers.

My, how the times have changed. So, how does it all work? earphones, hands-freecalling –

 What’s the magic behind Bluetooth tech?

 Before I get into that, let’s take anothertrip down memory lane, only, this time, we’re going a little further back!

 The idea of what we call “Bluetooth” today's was first introduced back in 1989. Because, well, let’s be honest, cords andwires are annoying! It was a major undertaking, so they broughtDr. Jaap Haartsen on to the project.

How Bluetooth Works?


 A mere 5 years later, he’d be the engineers who made the breakthrough and came out with the first protocol. It took a few more years to perfect the technology.

History Of Bluetooth

 But finally in 1999, they presented their first hands-free headset to the world at the Comdex computer exposition and trade showin Las Vegas. It even won the Best of Show Award!

 Where does the name Bluetooth come from?

 Well, at the time, three companies were working separately to create short-range radio technologies that would connect computers and differentdevices using short-wave frequencies.

 But since the invention was in its early stages,Intel, Ericsson, and Nokia decided that the best way to proceed was to create a singlewireless standard. 

Invention Story of Bluetooth

That story inspired Kardach to propose hisidea of calling this single short-link device that would unite communications “Bluetooth.” So, that was it! (And in case you’re wondering how the kinggot the nickname, legend has it that he had a rotten tooth that looked kinda blueish.)

 They also paid tribute to the great Vikingking when they came up with the logo.

 Hmm, just looks like a B to me. But if you examine it a little closer (and you happen to know the Nordic alphabet), then you’ll see that the logo is formed from two different symbols.

 They represent the initials of the king: Hand B for Harald Bluetooth.  

 Bluetooth works a lot like Wi-Fi.

 It uses radio waves to send data between devicesat short distances. Now, whereas Wi-Fi uses radio waves to transmitdata between your router (where your Wi-Fi comes from) and your device, Bluetooth doesit between devices.

 So, basically, if two things have a Bluetoothoption, then they can transmit data between each other. This “communication” of sorts is measured in Gigahertz. For both Bluetooth and Wi-Fi, it’s usuallyat the 2.4 Gigahertz frequency.  

That means those radio waves (imagine themjust as they are, waves!) are moving in hoards and really fast. That is, 2.4 billion waves per second!

Bluetooth Equipments

 That’s why when you, say, turn your Bluetooth mouse on, the cursor starts whipping around your computer screen in an instant!

 Now, even though Bluetooth still works atthe 2.4 Gigahertz frequency just like Wi-Fi, it mostly works at shorter distances and usesmuuuch weaker signals – just 1 milliwatt of power. You know those little laser pointers yourcat loves so much?

 They put out 5 milliwatts of power, so thatgoes to show you how weak just 1 is. Bluetooth doesn’t need as much power as Wi-Fi does because it’s not really doing as much work.

 But the cool thing is that Bluetooth can connectto 8 devices at the same time without any interference from other wireless items likegarage doors or baby monitors. (Wi-Fi can have issues with that.)

Bluetooth Headphones

 So, here’s a real-life example: let’s say you’re listening to music from your laptop using your wireless headphones andyou’re also typing on your computer with your wireless keyboard.

Bluetooth Transmitter

 The Bluetooth transmitters in both your computerand your devices use 79 different frequencies in that range. To prevent your music from getting in theway of your keyboard, it changes frequencies 1,600 times every second!

 When you try to connect a Bluetooth device your phone, then a sort of conversation takes place between the two of them.

How Bluetooth Exchange Information

 They present their data and decide on whether they need to exchange information or if one of them needs to control the other. 

This short digital dialogue ends andthe two devices agree on their roles, they connect together to form a network. That Bluetooth network of connected devices is called a “piconet”.

 Once their connection is established, they begin their frequency hopping in order to continually stay connected and avoid interference.

Working principle of Bluetooth

 You can even take a device with you to anotherroom, and it’ll keep working. As long as you don’t go too far, that is! Bluetooth is such a huge part of our everyday lives, yet most of the time it goes unnoticed

Which Types of Devices Use Bluetooth?

 So if you’re wondering what devices use  Bluetooth nowdays the answer is almost all of them. Phones, headphones, earbuds, speakers, stereos,TVs, cameras, cars, tablets, game consoles, you name it! And if you were to watch them all at work,it’d be quite the spectacle.

Bluetooth As chatting Device

 You’ve got your wireless mouse and computer“chatting” with each other, your Bluetooth speaker has its own conversation going onwith your phone. And the best part is that none of them sorudely intervene in the others’ conversations!

 That’s not only thanks to frequency-hopping. It’s also because each device has its own“address” programmed by the manufacturer.

 So even if your wireless mouse gets a message from your TV, it’ll just automatically ignore it because they have different addresses.

 When Bluetooth first came out, it was really easy for someone to access your data without your permission. But over time this technology has become moresecure.  

Bluetooth Manufacturing

Bluetooth manufacturers are aware of the risks,so they’ve already done a lot to make devices more protected against security threats.

 You see, in almost all of our personal gadgets,there’s the “trusted devices” option that enables you to share data without permission while others need permission to access your device. But let’s not forget about spam.

How to Use Bluetooth

 There’s this trend called blueja king wherea person or company can send you their electronic business card or an ad as a text message using Bluetooth. Of course, when you see that, you either ignoreit or panic!

 But this is something that mostly happens in public places where everyone is using their phones. You can prevent it from happening to you bymaking your Bluetooth device non-discoverable when you’re out and about.

 And if it does happen to you, don’t worry. Just turn your Bluetooth off and remove theattacker’s device from your trusted ones. Now with those bluejackers busted, let’stalk about the health concerns.

Bluetooth Research

 Unfortunately, there’s not enough evidence and research done on Bluetooth to determine if it’s harmful for people or not. And it’s also quite tricky because Bluetoothwaves are just one part of the wireless smog that surrounds us every single day.

Is Bluetooth Is Harmful To Health?

  perhaps this will be comforting to know:the amount of non-ionizing radiation present in Bluetooth headphones is a lot less thanwhat’s in a typical cellphone. So if you’re worried about Bluetooth affecting your health, you should probably give up your phone first. 

And, still, your phone isn’t a cause foralarm either. There are regulatory organizations put inplace to keep the public safe from being exposed to too many radio frequencies from our devices.

 For example, The Federal Communication Commission checks that cellphone manufacturers don’t sell devices that go over what scientistssay is the limit of how many radio frequencies the human body can absorb from one gadget.

Specific Absorption Rate(SAR) of Bluetooth

 That number is called the Specific Absorption Rate(SAR), and you can always check which models have the lowest if you’re in themarket for a phone. So don’t worry too much about it.

 The health aspect is always under check andis constantly being studied.

Conclusion

 All in all, I still say Bluetooth is a lot better than getting tangled up in cords and having to change CDs in your car! So, do you use Bluetooth in your every life and what for? Let me know in the comments below

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