Bluetooth: A Technological Leap
Technological evolution has always been a reality check for us humans, which makes us realize how far we have come! Video calling, which made its first appearance on shows like ‘Star Trek’ in the 60s’, was shown as a fictitious, futuristic, way of talking to people while being able to see them, and it was only 4 years later when this dream made its way to reality! Further, headphones, TV systems, stereos, chargers, and many other things that could only function with wires that would tangle up like yarn, now simply function without any hassle with the help of Bluetooth!
With a whopping 5 billion devices employing it, Bluetooth is one of the most commonly used network connectivity methods in the world! But how exactly does this seamless connection work? First, let’s look at the history and basics. As a tribute to King Harald’s “Bluetooth” Gormson, Jim Kardach – who was a part of one of the three companies working on Bluetooth and short-wave frequencies – gave the wireless technology its name, and Bluetooth made its entry into our world in 1998.
Bluetooth is very similar to the way WiFi works, as it uses radio waves to send data between devices, just like WiFi does from the router to our devices. Any two devices having Bluetooth enabled can share data if connected. This communication between the devices is measured in Gigahertz, and is usually at 2.5 Gigahertz frequency, which makes 2.5 billion waves travel per second, which is why when we connect any 2 devices via Bluetooth, it seems smooth, fast, and seamless!
However, if we take one connected device away from the other, the connection would get weaker, and if far enough would disconnect on its own. This happens when the device experiences much weaker signals; just 1 milliwatt of power!
Another reason why Bluetooth is widely appreciated is that it can connect to 8 devices at the same time, without any interference from other wireless items! This happens because the Bluetooth transmitters in all devices use around 70 different frequencies and change them 1600 times per second! When you connect something to a Bluetooth device, we can say a conversation happens among the two where they both exchange unique addresses for each device. They then decide whether they need to pair with each other or one of them needs to control the other. Once this takes place, and the roles of both devices become clear, they connect to form a network known as the Piconet. Once this connection is established, the frequency hopping begins!
All these little functions together form this connection! The connection that made the lives of so many people easier, better, and, most importantly, helped technology take a huge leap in the world of evolution as it defeated every chance of risks, whether it comes to online safety or side effects on humans from its waves. Despite its simplicity, Bluetooth’s perfection is enabled by the fascinating scientific complexities hidden behind its daily convenience.
Amaeera Kher, 8