Most of your devices are compatible with or use Bluetooth. Take your smartphone for example, Bluetooth allows you to use headphones wirelessly and freely. Now, how does it work? Communication is established by pairing to create a network. The network is then known as a “Piconet”, one device acts as the ‘leader’ and the others as followers. Bluetooth is also designed for low power consumption and operates in a 2.4GHz ISM frequency band to avoid interference with other connections. It also uses spread-spectrum frequency hopping to avoid interference and maintain security and can change frequencies up to 1600 per second in necessary. Bluetooth also supports various ‘profiles’ for specific apps based on power and range, and as expected, it also uses device authentication and encryption to protect against hackers, or someone that’s not you.
Bluetooth was created by a Swedish communication company known as Ericsson in the mid-1990s, and was named after the 10th century Danish king, King Harald Bluetooth, whom united Denmark and Norway. The company began in 1989 when the chief technology officer, and a physician came up with an optimal “short link” radio technology standard to transmit signals between personal devices and wireless headphones.
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