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Related to Bluetooth: Bluetooth headset


(protocol, standard)
A specification for short-range radio links between mobile computers, mobile phones, digital cameras, and other portable devices.


The standard wireless personal area network (WPAN) for short-range transmission of digital audio and data. Using radio waves, Bluetooth transmits through walls and other non-metal barriers. Although the term is synonymous with cellphone headsets and in-vehicle, hands-free telephony, Bluetooth is also used for wireless speakers, keyboards, mice, game controllers, smartwatches and more (for category details, see Bluetooth profiles).

Spread Spectrum Transmission
Using frequency hopping spread spectrum (FHSS), Bluetooth randomly changes to one of 79 channels 1,600 times per second in the same unlicensed 2.4 GHz band as Wi-Fi. See spread spectrum.

Bluetooth Versions (see table below)
Bluetooth 1.2 (Basic Data Rate) was the first widely used Bluetooth technology. Bluetooth 2.0 + EDR (Enhanced Data Rate) improved speed and interference handling. Bluetooth 3.0 + HS (High Speed) establishes the connection via Bluetooth but transfers data over Wi-Fi.

Version 4 added Bluetooth Low Energy (BLE). Branded as "Bluetooth Smart," BLE uses only a quarter of the power at 1 Mbps, and devices can transmit for years on watch batteries (see Bluetooth LE).

Scandinavian Origins
Named after ancient King Harald Blatan of Denmark, Sweden-based Ericsson developed Bluetooth and co-founded the governing body in 1998 ( Bluetooth is also an IEEE personal area network (PAN) standard (see 802.15). Supporting point-to-point and multipoint architectures (see piconet), there are billions of Bluetooth devices in use. See Bluetooth glossary.
BLUETOOTH DATA RATES          Max. Data            Rate Version   (Mbps)

 1.2         1    "Bluetooth Classic"
 2.0 + EDR   3    "Bluetooth Classic"
 2.1 + EDR   3    "Bluetooth Classic"

 3.0 + HS   24    (over Wi-Fi)

 4.0         3
 4.0 + BLE   1    (Bluetooth LE)

 4.1   Improvements (see  Bluetooth 4.1)

 4.2 + BLE   1+   Designed for IoT
                    (see  Bluetooth 4.2)

 BLUETOOTH POWER CLASSES         Max.   Approx.        Power   Range Class   (mW)  (meters)

  1      100     100
  2      2.5      10
  3      1         1

Bluetooth = Headset
Because they are were so ubiquitous, "Bluetooth" initially became synonymous with "headset." However, Bluetooth connects many other devices.

Game Controllers
This "gamepad" from Sony uses Bluetooth to communicate with the PlayStation3 game console. See video game controller. (Image courtesy of Sony Corporation.)

Blue Teeth!!
This Oral-B toothbrush sends elapsed time to the app in the user's smartphone via Bluetooth to monitor brushing time and history.

The Bluetooth Logo
The stylized "B" displayed on this cellphone means it has been synchronized with a Bluetooth device.
References in periodicals archive ?
We look forward to continuing this relationship as we collaborate on advanced packaging technologies for our leading-edge Bluetooth chips.
The new Bluetooth standard with UWB will provide much higher data transfer rates than standard Bluetooth and so be perfectly positioned to target home entertainment applications such as high-definition (HD) video streaming.
As the market migrates to higher audio quality for both mono (telephony) Bluetooth headsets and in-car handsfree systems today and stereo (music playing) Bluetooth headsets and HiFi connections tomorrow, Bluetooth audio connections will become, by far, the most important application for all of these segments.
The Bluetooth SIG Marketing Committee decides plans and activities that promote Bluetooth wireless technology, the Bluetooth Brand, the Bluetooth Specification, the Bluetooth Qualification Program, and membership in the Bluetooth SIG.
Bluetooth takes its name from Harald Blatand (Blue Tooth), the 10th-century Danish king who cudgeled neighboring Viking chieftains into unifying Denmark and Norway.
BlueCore3-ROM's complete single-chip solution with on-chip microcontroller and 4Mbits ROM enables device manufacturers to easily incorporate robust Bluetooth connectivity into their handsets.
In Australia, we have consistently outsold other Bluetooth wireless brands, competing on the superiority of our products, our warranty, and our commitment to first-rate service for customers, retailers, and distributors alike," said Taisen Maddern, CEO, BlueAnt Wireless.
The Nokia Bluetooth Headset BH-800 also implements the new HFP1.
CSR's BlueCore3-Audio Flash is a cost-effective and compact single-chip radio and baseband IC designed for Bluetooth devices that require an on-chip mono CODEC and 6Mbits of embedded Flash memory.
The use of CSR's BlueCore3 technology and Bluetooth version 1.