how bluetooth headphones work

 

Bluetooth is a wireless technology that allows for the transmission of data over short distances, typically about 10 meters. It was originally developed in the 1990s by Ericsson and Nokia to solve a specific problem: how to sync Nokia mobile phones with other devices without having to connect them with wires. The solution was creating Bluetooth radio waves between devices and an antenna, which could then exchange information with little power.

Bluetooth headphones work similarly to any other RF device: data is transmitted via radio waves from one end point (the transmitter) over the air at a given frequency (2.4 GHz), through space, until it reaches its destination (the receiver). Once the transmission has been completed, the connection with the receiver is terminated and data can be transmitted further.

The technology is based on a Physical layer that acts as an interface between a device (e.g. your smartphone) and a radio communication system, which includes an antenna to transmit radio waves, and a receiver to demodulate those waves in order to receive them again. The Bluetooth standard was created in 1997, and currently has over 30 million installed devices worldwide.

Bluetooth headphones can be divided into three categories:

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1. Wired headphones with a wire connecting the two earphones and the music source, e.g. an mp3 player. This type of headphones is similar to a normal pair of headphones with the difference that you have to plug its jack into your smartphone or mp3 player in order to listen to music. These are not wireless and do not use Bluetooth technology at all, but they still have the ability to connect a wirelessly-enabled device using an adapter (an adapter is a device that connects one device with another via Bluetooth).

2. Bluetooth headphones that work wirelessly via Bluetooth and do not need a cable to connect the two earphones: your smartphone (or mp3 player) connects to those earphones without a cable.

3. Wireless headphones that contain their own battery and don't need any external power source: they connect via Bluetooth to your smartphone (or mp3 player). This type of headphone is similar to the wired type, but they usually have longer battery life as they don't have an electric power source of their own.

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A final note is that all wireless headphones work with all types of computers, smartphones, tablets and other electronics powered by the same kind of technology (e.g. WIFI), and they can be used with any type of audio source (an mp3 player, a computer, a TV, etc.).

How do wireless headphones work?

When Bluetooth headphones work, the music source sends data to the headphones that are connected via Bluetooth. The data is sent through the air using radio waves in 2.4 GHz range of frequencies. You can use band 1 (2.401GHz – 2.480GHz ), band 2 (2.4835GHz – 2.5GHz), band 3 (2.5000GHz – 2.562GHz) or band 4 (2.567GHz – 2.693GHz). The frequency of the transmission is determined by the type of Bluetooth technology used in the headphones.

Each cell phone, computer or other electronic device has a set number of radio frequencies that it can use to communicate with other devices like Bluetooth to make and receive calls, send text messages and transfer data for applications, etc. In this case, the receiver (earphones) will receive signals from a nearby cell phone using a particular frequency band and turn them into music or data through an analog-to-digital converter in order to process it as sound or whatever you want to listen to.