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  • Has this ever happened to you?

    各位有遇過這種狀況嗎?

  • You're not alone.

    不是只有你

  • Apple, Google and other companies

    蘋果、Google 和許多公司

  • have gotten rid of the headphone jack from their phones.

    早已不在手機上設置耳機孔

  • This is pushing people towards wireless headphones,

    這使得消費者轉向使用無線耳機

  • which means they'll have to rely

    這意味著消費者必須仰賴

  • on that Bluetooth connection.

    藍芽連線技術

  • The Bluetooth is still so unreliable.

    但是至今藍芽仍然很不可靠

  • Its got a short range, devices disconnect randomly

    它的有效範圍很短,裝置很容易忽然斷線

  • and it uses up battery life.

    並且十分耗電

  • Even thought it's been around for 20 years, why does Bluetooth still suck?

    儘管藍芽技術已有約 20 年的歷史,但到底為什麼還是這麼爛?

  • Bluetooth is a wireless standard used all around the world.

    藍芽技術是一種世界通用的無線標準

  • Wireless printers, keyboards, game controllers,

    無線的印表機、鍵盤、電玩搖桿、

  • speakers and headphones all use it.

    麥克風和耳機...等,皆是運用此技術

  • It was created by a group of engineers in the mid '90's

    藍芽技術是在 90 年代由一群工程師所發明

  • as a secure way to exchange data between devices,

    是裝置間傳輸資料的一種安全方式

  • the Bluetooth name and logo come from

    藍芽的名稱和商標源自於

  • 10th century viking king Harald Gormsson who,

    十世紀維京國王哈拉爾德高姆森

  • similar to Bluetooth's purpose,

    該國王的事蹟和藍芽的概念很相似

  • unified two separate entities, Denmark and Norway.

    他統一了丹麥和挪威兩個分離的政體

  • King Harald's nickname was Blatand,

    而這位國王的綽號就叫布萊登

  • which translates from Danish to Bluetooth.

    而該詞從丹麥文翻譯成英文即為藍芽

  • The logo comes from the initials of King Harald Blatand.

    藍芽的標誌來自於國王哈拉爾德布萊登名字的兩個首字母

  • It is a combination of the runic letters H and B.

    是古北歐文字 H 和 B 字母的結合

  • Bluetooth uses the 2.4 gigahertz frequency

    藍芽使用的是 2.4 百萬赫茲的頻段

  • to communicate with other devices.

    和其他裝置進行通訊

  • This frequency and a few others are referred to

    此頻段和其他少數幾個頻段統稱為

  • as the ISM band, for Industrial

    ISM 頻段,用於工業

  • Scientific and Medical devices.

    科學研究和醫學裝置

  • This is the spectrum that baby monitors

    嬰兒監控器和無線電話

  • and cordless phones all use.

    都是使用這個頻段

  • It's also the same frequency,

    日光燈和微波所釋放出的

  • fluorescent lights and microwaves omit.

    電波頻率也和這個頻段相同

  • These frequencies don't require devices

    這類頻段不需要經過美國聯邦通訊委員會

  • to have an FCC license to operate on them.

    授權即可使用

  • This makes the band attractive to manufacturers

    這對許多製造商而言是一大利多

  • because they don't have to deal with the FCC.

    如此便不需要花功夫和美國聯邦通訊委員會打交道

  • Because of this, the ISM is brimming with devices.

    也鑒於此因素,許多裝置都支援 ISM 頻段

  • And they all interfere with your Bluetooth devices.

    而這些裝置會和你的藍芽裝置互相干擾

  • Any device running on Bluetooth,

    任何配備藍芽的裝置

  • falls into one of three classes.

    都屬於這三種功率等級之一

  • Class one, for long range, these need a power supply,

    等級 1: 用於較長傳輸距離,需要電力供應

  • and are mainly used for industrial purposes.

    主要用於工業用途

  • They have a range of nearly 330 feet.

    有效傳輸距離約 330 英尺

  • Class two, they have a range of about 30 feet.

    等級 2: 有效傳輸距離約 30 英尺

  • This is what most cellphones and speakers use.

    此等級是大多數手機和藍芽喇叭所使用

  • Class three devices have a range of less than 30 feet.

    等級 3: 有效傳輸距離小於 30 英尺

  • Class two and three devices

    等級 2 和 3 的裝置

  • generally use low power Bluetooth.

    一般而言都是使用低功耗藍牙

  • But even low power can use

    不過即便是低功耗藍牙

  • a precious battery life on your phone.

    仍舊會用到手機的電力

  • And if you have a class two speaker,

    如果你的藍芽喇叭屬於等級 2

  • 20 feet away from your phone,

    若它距離你的手機 20 英尺以外

  • it still may not work great.

    效果會不好

  • Especially if there's any interference

    若同時,附近又有來自其他裝置的電波干擾

  • coming from other devices.

    效果就會更差

  • Bluetooth also transfers data much slower than WiFi does.

    藍芽的資料傳輸速度也比 WIFI 慢很多

  • While devices connected via the new WiFi Direct standard

    透過新 WIFI 標準連線的裝置

  • will be able to transfer data at 250 megabits per second,

    可以每秒 250 MB 的速度傳輸資料

  • Bluetooth 4.0 can only get up

    而藍芽 4.0 最多只能達到

  • to 25 megabits per second max.

    每秒 25 MB 的速度

  • There's no superfix for these issues coming anytime soon.

    這個問題短期看來仍無解

  • But if you want to improve the connection

    如果你想要改善兩個裝置間的連線狀況

  • between two devices, there are a few things you can do.

    你可以這麼做:

  • Keep the devices as close together as possible.

    盡可能使裝置靠近一些

  • Keep your devices updated.

    讓裝置時時更新

  • Reset your connections daily.

    每天重設連線

  • Or even use a device that can amplify a Bluetooth signal.

    或甚至你可以使用可以放大藍芽訊號的裝置

  • While there's no sure fix yet,

    總而言之,目前仍沒有確定有效的方式

  • some companies are taking matters into their own hands,

    有些公司已開始自行尋找解決之道

  • developing technology that works a lot like Bluetooth.

    開發出原理和藍芽相似的技術

  • Apple's W1 chip enables its AirPods

    例如蘋果 的 W1 晶片可使所在的 AirPod

  • to switch to whatever device you're using,

    切換至任何您在使用的裝置

  • rather than having to unpair and re-pair

    而非每次都得要停止配對

  • the devices each time.

    然後再重新配對

  • Will we start seeing other companies

    我們未來是否會看到其他公司

  • take wireless communication into their hands?

    也開始自行開發無線通訊技術呢?

  • We'll just have to wait and see.

    只能拭目以待囉!

Has this ever happened to you?

各位有遇過這種狀況嗎?

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B1 中級 中文 美國腔 裝置 傳輸 通訊 技術 國王 有效

為什麼藍牙還是這麼爛?(Why Does Bluetooth Still Suck?)

  • 8947 523
    Samuel 發佈於 2018 年 09 月 13 日
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