We all love to listen to music. Over time, the way we access music has evolved with technology. MP3 players have evolved into our car sound system and portable speakers. Luckily, we all said goodbye to those headphone cables that get tangled as soon as we let them go. Of course, we owe this to Bluetooth technology.
Thanks to the Bluetooth feature, we can operate multiple devices such as mouse, keyboard and headphones at the same time from our computer. But how do they decide what kind of connection they will have with which device while doing all this? Let’s take a look at Bluetooth technology and the answer to these questions together.
Bluetooth is a type of technology based on a system of data transport between two devices using radio waves.
It houses a data transport system just like Wi-Fi; however, while the Wi-Fi system establishes a connection between the signal distributor and a device, data transfer is provided by establishing a connection between two devices that have this feature in Bluetooth technology. In this system, whose wavelengths are measured in GHz, 2.4 billion waves are emitted per second.
Bluetooth takes its name from the Scandinavian king Harald Bluetooth Gormsson.
Jim Kardach, an employee of Intel, one of the important companies of the period working on “Short Distance Radio Technology”, became the name father of Bluetooth technology, inspired by a book he read about the Viking king Harald Bluetooth Gormsson, who united Denmark and Norway at that time. Legend has it that a Viking king’s tooth turns blue because it rots.
A device with Bluetooth can connect and exchange data with multiple devices without confusion.
Bluetooth generally has the principle of working over short distances and low signals. Each device transmits data between itself and the other device to which it is connected, with signals in a different frequency range. Devices create a network of signals between them during data transfer. This is called a piconet. Thanks to this network, the devices do not interfere with the transfer between each other and there is no confusion.
When Bluetooth-enabled devices are paired, a meeting takes place like between people.
Each technological device has addresses, that is, names assigned to them by their manufacturers. Before connecting, they introduce themselves to indicate that they are safe for each other. We can compare this to a process where we say our name and introduce ourselves when we meet someone new.
Then they decide how to transfer data between them. In the next data exchange, the two devices can connect without interrogation. Because we also do not meet again and again every time we see each other.
The devices change frequency 1600 times per minute while establishing a connection between themselves.
This is called frequency jumping. Let’s explain with an example: Let’s take a crowded place where everyone talks loudly among themselves. We can’t understand exactly what anyone is talking about, but we can hear their voices and even perceive some words. However, if your ears are not as good as Legolas’s, we may not be able to decipher what the conversation is about.
Because the dynamics of every conversation is different and the subject can change even with instant jokes. Here, in frequency jumping, the frequency of the signal that transmits data every minute changes in order not to interfere with other devices and to prevent interference from them.
When Bluetooth first came out, the biggest problem was the vulnerability, it was not difficult to capture someone’s personal data.
Bluetooth technology has always continued to be developed since its inception. Over time, they’ve dealt with this with the ability to add or remove secure devices. Today, we can safely connect more than one device to each other from our phones or computers as we allow. Just like Harald Bluetooth uniting Denmark and Norway.
- Sources: Brunch Education, Bright Side
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