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Has this ever happened to you?
You're not alone.
Apple, Google and other companies
have gotten rid of the headphone jack from their phones.
This is pushing people towards wireless headphones,
which means they'll have to rely
on that Bluetooth connection.
The Bluetooth is still so unreliable.
Its got a short range, devices disconnect randomly
and it uses up battery life.
Even thought it's been around for 20 years,
Bluetooth is a wireless standard used all around the world.
Wireless printers, keyboards, game controllers,
speakers and headphones all use it.
It was created by a group of engineers in the mid '90's
as a secure way to exchange data between devices,
the Bluetooth name and logo come from
10th century viking king Harald Gormsson who,
similar to Bluetooth's purpose,
unified two separate entities, Denmark and Norway.
King Harald's nickname was Blatand,
which translates from Danish to Bluetooth.
The logo comes from the initials of King Harald Blatand.
It is a combination of the runic letters H and B.
Bluetooth uses the 2.4 gigahertz frequency
to communicate with other devices.
This frequency and a few others are referred to
as the ISM band, for Industrial
Scientific and Medical devices.
This is the spectrum that baby monitors
and cordless phones all use.
It's also the same frequency,
fluorescent lights and microwaves omit.
These frequencies don't require devices
to have an FCC license to operate on them.
This makes the band attractive to manufacturers
because they don't have to deal with the FCC.
Because of this, the ISM is brimming with devices.
And they all interfere with your Bluetooth devices.
Any device running on Bluetooth,
falls into one of three classes.
Class one, for long range, these need a power supply,
and are mainly used for industrial purposes.
They have a range of nearly 330 feet.
Class two, they have a range of about 30 feet.
This is what most cellphones and speakers use.
Class three devices have a range of less than 30 feet.
Class two and three devices
generally use low power Bluetooth.
But even low power can use
a precious battery life on your phone.
And if you have a class two speaker,
20 feet away from your phone,
it still may not work great.
Especially if there's any interference
coming from other devices.
Bluetooth also transfers data much slower than WiFi does.
While devices connected via the new WiFi Direct standard
will be able to transfer data at 250 megabits per second,
Bluetooth 4.0 can only get up
to 25 megabits per second max.
There's no superfix for these issues coming anytime soon.
But if you want to improve the connection
between two devices, there are a few things you can do.
Keep the devices as close together as possible.
Keep your devices updated.
Reset your connections daily.
Or even use a device that can amplify a Bluetooth signal.
While there's no sure fix yet,
some companies are taking matters into their own hands,
developing technology that works a lot like Bluetooth.
Apple's W1 chip enables its AirPods
to switch to whatever device you're using,
rather than having to unpair and re-pair
the devices each time.
Will we start seeing other companies
take wireless communication into their hands?
We'll just have to wait and see.
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為什麼藍牙還是這麼爛?(Why Does Bluetooth Still Suck?)

5366 分類 收藏
Samuel 發佈於 2018 年 9 月 14 日   Tracy Wang 翻譯   Evangeline 審核

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你也曾經怎麼樣都連不上藍牙嗎?越來越多的設備開始設計成「無線」藍牙連接,但關鍵的藍牙技術卻常常失聯,或連到錯誤的機台上。這部影片簡單地解說了藍牙運作的方式以及優缺點,讓我們來看看藍牙到底是什麼吧!

1randomly0:21
randomly 是「隨機地;任意地」的意思,作副詞用。
The order of the interviewees were arranged randomly by a computer.
面試者的順序是由電腦隨機安排的。


另外,當 randomly 作形容詞用時為 random,同樣為「隨機的;任意的」之意。
Jack was injured by a random act of violence on his way to work.
傑克在去上班的路上被隨機攻擊事件所傷。


*同場加映:
【TED】Donald Hoffman:我們看到的真的是現實嗎? (Do we see reality as it is? | Donald Hoffman)


2operate1:36
operate 是「(使) 運行;操作」的意思,作動詞用。
The instructions given by the Principle helped the school operate smoothly.
校長給予的指示幫助學校順利運行。


另外,operate 有「開刀;動手術」的意思,同樣作動詞用,並且經常和介系詞 on 搭配使用:operate on sb.
If the tumor gets bigger, they'll have no choice but to operate on that 4-year-old boy.
如果腫瘤再變大,他們別無選擇,只能為那四歲大的男孩動手術。


3interference2:27
interference 是「干涉、干預」的意思,作名詞用。
His any suggesstion seems to be interference when you have no repesct for him.
當你不尊重他時,他的任何建議似乎都是在干涉你。


另外,interference 作動詞用時為 interfere,同樣為「干涉、干預」的意思。
Don't you ever interfere between a couple when they're in a fight.
你可千萬別干涉情侶間的吵架。


*同場加映:
【TED-Ed】海龜的生存之道 (The survival of the sea turtle - Scott Gass)


4amplify3:05
amplify 為「擴大,放大 (聲音)」的意思,作動詞用。
Live performances can amplify the touching feelings of audiences.
現場演出可以渲染觀眾的感動之情。


另外,與amplify 相似的一字為 amplitude,意思是「廣闊;豐富」,作名詞用。
The sheer amplitude of the movie invites high acclaim from critics of great reputation.
僅僅這部電影的恢弘巨製,就讓它得到享有盛名的評論家的高度讚賞。


5switch3:18
switch 為「(用開關) 打開、關閉;轉換」的意思,作動詞用。
James switches the TV off in order to concertrate on the papers.
詹姆士為了要好好專注於論文而將電視關起來。


*同場加映:
【TED】艾絲特.佩雷爾:重新思考外遇... 給所有愛過的人 (Rethinking infidelity ... a talk for anyone who has ever loved | Esther Perel)


無線連接的技術真的非常方便,希望未來藍牙技術或其他新的無線連接技術能更穩定、更好用囉!

文 / Priscilla Huang

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