![]() Bluetooth Version 5.0-5.2īluetooth 5.2, released in 2020, is the latest version available. With 2010’s Bluetooth 4.0, the need for longer battery life in smaller and smaller Bluetooth-enabled devices was finally met.īluetooth 4.0’s introduced “Bluetooth Low Energy.” With BLE small low power consumption devices like fitness trackers were able finally to meet the real life demands of consumers.īluetooth 4.0 and 4.2 also introduced connection distances of up to 200ft, less Bluetooth signal interference, improved pairing, and increased data transmission. Unfortunately, Former battery life problems were only exacerbated with 3.0’s increased speed. Users of 3.0 were now capable of transferring improved audio and even video data. It had a low bandwidth compared to Wi-Fi, frequent connection loss, poor security, and low battery life.īluetooth 3.0, released in 2009, is considered the last of the “classics.” With transfer speeds up to 24 Mbps and Wi-Fi connection compatibility, Bluetooth 3.0 was the first version to offer a real “high speed” connection. The new version has an increased connection range of up to 100 ft and data transfer speeds topping 3 Mbps in Bluetooth 2.1.Īlthough much faster than its predecessor, Bluetooth 2 still had singificant drawbacks. ![]() Bluetooth Versions 2.0-2.1īy 2005 an international need for faster localized wireless data transfer ushered fourth Bluetooth version 2.0. So, although it could handle phone calls, the Bluetooth at the time lacked the bandwidth to transfer large data like music. ![]() ![]() The early versions had a data transfer speed of around 1 Mbps and a range of about 30 ft. With the upgraded version 1.2, that list of devices quickly increased to cell phones, headsets, cars, laptops, and cameras. The first version of Bluetooth made available to the general public was initially used to connect external hardware devices to computers. In 1997 that tech caught the eye of the head of a little company called IBM. The tech needed to be capable of transmitting data between personal computers and wireless headsets.īy the mid-90s’ the project codenamed “Bluetooth” had launched an early standardized version of the technology. That’s the year a team at Swedish company Ericsson Mobile was tasked with creating a short link radio technology. There are three main types of audio compression formats, uncompressed, lossless, and lossy.Although released in 1999 and available to the general public by the years 2000/2001, Bluetooth technology got its start way back in 1989.Its influence on strategic compression extends to virtually every audio format. This is how MP3 compression came into the world.A psychoacoustic model is applied to digital media, and determines what can be deleted to save space without a noticeable loss of sound quality. Psychoacoustics studies how humans perceive sound.This is because the further you get from the source, the more interference from physical barriers (e.g., walls, objects, people) and overlapping radio frequencies (e.g., microwaves, Wi-Fi signals). Bluetooth devices have an assigned range (typically 10 meters for headphones). ![]() This is calculated by multiplying the sample rate by the bit-depth. Bit rate (kbps or Mbps): the amount of audio data transferred per second.A greater bit depth multiplies the file size. CD-quality is 16-bit, but high-resolution files extend this to 24-bit. A higher bit depth records a signal more accurately. Bit depth (-bit): the number of digital bits used to represent each audio sample.A greater sample rate means a greater file size. “High-resolution” file formats are considered to be 96kHz or greater. You need at least two samples per cycle for a digital signal to represent any given frequency, so audio is typically sampled at a rate of 44.1kHz-approximately twice the upper limit of human hearing (20kHz). Sample rate (Hz): the number of points of data per second in an audio file. ![]()
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