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In recent years, Bluetooth connectivity has become more and more prevalent in our everyday lives and how we listen to audio (through speakers and headphones). You may have wondered how exactly your Bluetooth speaker works, and by reading this article, you'll find out.

What Is Bluetooth Technology?

Bluetooth is a wireless technology standard. It is used for exchanging data between fixed and mobile devices over short distances using short-wavelength ultra-high frequency (UHF) radio waves.

More specifically, Bluetooth uses the microwave radio frequency spectrum in the 2.402 GHz to 2.480 GHz range to transmit digital data wirelessly.

Bluetooth technology is a deeply complex subject, and we will only be scratching the surface in this article. If you’d like to learn about Bluetooth technology in greater detail, I’d suggest starting with this Wikipedia article.

The complexity of Bluetooth technology is due, in part, to its incredibly wide range of applications. Not only is Bluetooth used to transmit digital audio from digital devices to speakers (or headphones and headsets), but it is also implemented in the following wireless data transferring applications:

• Contol and communication between smartphones and other Bluetooth audio devices and Bluetooth-compatible car sound systems.
• Communication between a smartphone and a smart lock for unlocking doors.
• Communication between smartphones and other Bluetooth audio devices and Bluetooth-compatible wireless speakers.
• Communication between wireless Bluetooth headsets and intercoms/gaming systems/computers, etc.
• Streaming of data from Bluetooth-enabled fitness devices to smartphones/computers etc.
• Wireless networking between computers in close proximity.
• Communication between computers and their input/output devices (mouse, keyboard, printer, microphones, headphones, etc.).
• OBject EXchange transfer of files, contacts, calendars/schedules and reminders.
• Communications in test equipment, GPS receivers, medical equipment, bar code scanners, and traffic control devices.
• As a replacement for infrared wireless and wired RS-232.
• Sending advertisements from Bluetooth-enabled advertising hoardings to discoverable Bluetooth devices.
• Bridging between two Industrial Ethernet networks.
• Connecting wireless controllers and other accessories to gaming consoles such as the Sony Playstation.
• Dial-up internet access using data-capable Bluetooth-compatible smartphones as wireless modems.
• Short-range transmission of health sensor data from medical devices to smartphones and dedicated telehealth devices.
• Allowing Digital enhanced cordless telecommunication (DECT) phones ring and answer calls on behalf of Bluetooth-capable smartphone.
• Real-time location systems (RTLS) used to track and identify the location of objects in real-time.
• Personal security application on mobile phones for the prevention of theft or loss of items.
• Prediction of travel times and road congestion for motorists.
• Connection between motion controllers in virtual reality (VR) and computer

Bluetooth Versions

Though originally developed in 1989, the first iteration (version 1.0) of Bluetooth only came about in 1999 after the Bluetooth Special Interest Group, the managing body, was formed in 1998.

The Bluetooth Special Interest Group continues to improve upon the standard and releases new versions periodically. With each new version, the BSIG improves on three key factors (range, data speed and power consumption) along with whatever peripheral factors they see fit for improvement.

Every version of Bluetooth supports downward compatibility. This means that the latest standard will work with all older versions. The capabilities of a Bluetooth connection will be limited to the standard of the device with the oldest version of BT.

Conclusion

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