Gadgetory

Bluetooth there's actually nothing to do with teeth it's a wireless technology standard for exchanging data over short distances using short wavelength you hdf radio waves bluetooth transmits in the is M that's for industrial scientific medical devices banned from 24:02 to twenty four eighty three point five megahertz also known as the 2.4 gigahertz short-range radio frequency band including its guard bands and as such it's also completely colorless so what's the story behind the name then well the original standard was developed by the telecom vendor Ericsson in 1994 as a wireless alternative to rs-232 data cables it didn't receive the name Bluetooth until 1997 when jim kardach who developed a communication system between mobile phones and computers proposed it while reading the long shifts by france gia benson a historical novel about Vikings and the Scandinavian King Harald Bluetooth legend has it that he United the Danish tribes of that period into a single unified nation much like what the introduction of the Bluetooth standard did for communication protocols ok cool story Linus but what does bluetooth actually do great question in short it facilitates communication between two to eight devices where there is one master device and up to seven slave devices the Vikings am i right and while it was only intended to replace serial cables it can do so much more you can wirelessly control and communicate between a mobile phone or tablet and hands-free headset car audio system speaker system and intercom you can network with a PC so like transfer files you can control printers and computer peripherals barcode scanners and traffic control devices and even replace infrared scanning in some cases and that list is not exhausted by any means so okay does lots of stuff but how does it work well there are two main components at the physical level well it works pretty much the same place any other radio frequency standard with antennas that can broadcast and receive signals in the appropriate bands but at the protocol level things get a little bit different to achieve a robust enough action for communication use even in environments with very heavy interference Bluetooth communicates with very short transmission bursts and then quickly does micro hops around to the various frequencies within its range and it allows more than one device to transmit on the same frequency at the same time but constant transmission of data means higher power consumption and for years most Bluetooth devices suffered from lame duck battery life that pained users and made the standard not practical for many applications until a few years ago bluetooth 4.0 or Bluetooth smart came on the scene it's basically the power efficient version of Bluetooth that has enabled amazing stuff like devices with one to two years of battery life on a single button cell I mean I wish my phone could do that to God as to power other stuff like the screen but one issue with Bluetooth smart accessories is that they can only be used with Bluetooth smart ready primary devices smartphones notebooks tablets a qualification given to phones that are by definition compatible with Bluetooth smart accessories meaning that there is no backwards compatibility between phones with older versions of Bluetooth like 2.0 3.0 and devices that are equipped with Bluetooth smart Bluetooth smart ready primary devices however are backwards compatible with accessories that run older versions of Bluetooth one other cool Bluetooth 4.0 fact is that range is no longer locked down so while manufacturers can opt to optimize for more traditional 10 meter or 30 meter ranges it's possible for devices to work at 60 meters or beyond so that's it Bluetooth is a low speed interference resistant communication protocol that allows devices to transfer data across multiple platforms at short range and now with great efficiency speaking of efficiency what if there was some way that we could read books while doing other things like driving working or even cleaning ourselves in the shower seriously shower speakers exist by the oh wait there is today's sponsor is audible.com if you enjoy reading but feel like your time spent reading is not being used as efficiently as it could be then you should give audible.com a try head over to audible.com slash tech quickie to become a member and get a new audiobook to listen to every month you can even get the world of Ice and Fire a 21-hour listening experience that acts as a gigantic prologue to the Song of Ice and Fire series by George RR martin also written by the same with some help from others it might not be as good as if he released the next books on dive in the next freaking decade or so but it might be enough to keep the you know withdrawal symptoms away speaking of withdrawal symptoms the best thing about audible besides their massive 150,000 plus library of titles is that the first one is free with a new account so check it out today at audible.com slash tag quickie thanks for watching guys like if you liked dislike if you disliked leave a comment if you have suggestions for future tech cookies I think that's pretty much it don't forget to subscribe if you haven't already and share this video with all your friends who don't know what bluetooth is or they think it's this piece