揚聲器又稱“喇叭”。是一種十分常用的電聲換能器件，在發(fā)聲的電子電氣設(shè)備中都能見到它。

　　(1)揚聲器有兩個接線柱(兩根引線)，當(dāng)單只揚聲器使用時兩根引腳不分正負(fù)*性，多只揚聲器同時使用時兩個引腳有*性

　　之分。

　　(2)揚聲器有一個紙盆，它的顏色通常為黑色，也有白色。

　　(3)揚聲器的外形有圓形、方形和橢圓形等幾大類。

　　(4)揚聲器紙盆背面是磁鐵，外磁式揚聲器用金屬螺絲刀去接觸磁鐵時會感覺到磁性的存在;內(nèi)磁式揚聲器中沒有這種感覺，

　　但是外殼內(nèi)部確有磁鐵。

　　(5)揚聲器裝在機器面板上或音箱內(nèi)。

　　Hi-res是由JAS (日本音頻協(xié)會)和CEA (消費電子協(xié)會)制定的高品質(zhì)音頻產(chǎn)品設(shè)計標(biāo)準(zhǔn)。

　　Hi-Res是High Resolution Audio的縮寫，而High Resolution就是高解析力、高分辨率的意思，這個詞在圖像顯示領(lǐng)域運用得

　　比較多，比如說4k分辨率就可以

　　High Resolution來形容，如此一L 來，High Resolution Audio就是高分辨率音源的意思。

　　Hi-Res是評價它的Sony爸爸和飛利浦爸爸合力推出dsd音頻的高保真超**水平的形容詞，有**的音樂，自然也有-流的耳機

　　，所以HR也用來表示頻響范圍超過5-40k hz的耳機。

　　現(xiàn)在Hi-res已經(jīng)快成為高端音頻設(shè)備必備的一個認(rèn)證標(biāo)志

　　HiRes隨身影音具備了全音域、高碼率的能力，意味著隨身影音產(chǎn)品邁進一個新的時代。更豐富的細(xì)節(jié)、采樣深度更高，對音源

　　的追求更上- -層。對于硬件產(chǎn)品來說，如果你擁有出色的符合Hi-res認(rèn)證的硬件產(chǎn)品，那么相比參數(shù)不夠得到認(rèn)證的產(chǎn)品來說

　　擁有更加出色的表現(xiàn)。這些得到認(rèn)證的耳機也-定都是市場中非常優(yōu)秀的產(chǎn)品。

　　Test info測試要求

　　1.In principle, the definition of "Hi-Res" is based on the announcement of Japan Electronics and Information

　　Technology Industries Association (JEITA) onthe March 26. 2014

　　2. "Hi-Res" applicable products JAS defines is to fulfll the fllowing specification on the recording,

　　reproduction and signal transition process

　　(1) Microphone response performance: 40 kHz or above during recording

　　(2) Amplification performance: 40 kHz or above

　　(3) Speaker and headphone performance: 40 kHz or above

　　(1) Recording format: Capability of recording using the 96kHz/24bit format or above

　　(2) I/O (nterface): Input/output interface with the performance of 96kHz/24bit or above

　　(3) Decoding: File playability of 96kHz/24bit or above (FL AC and WAV both required)

　　(In case of self-recording equipment, FL AC or WAV file is requred as minimum condition)

　　(4) Digital Signal Processing: DSP processing of 96kHz/24bit or above

　　(5) DIA conversion: Digital to analog conversion processing of 96 kHz/24 bits or above

　　3. Listening evaluation process is to be organized

　　(1) Listening evaluation process is required by each applicant.

　　(2) Each applicant must assign the audio/sound quality control manager in addition to the product quality

　　control manager.

　　(3) The audio/sound quality control manager should be responsible for final decision as Hi-Res Audio product to

　　be proved according to each company's sound evaluation standard.

　　Rre-testSample size預(yù)測試送樣規(guī)格:八對成品，8pairs finished products似及一個詳細(xì)介紹產(chǎn)品的URL鏈接Audio products

　　URL

　　Lead time項目周期:十到十二周，10-12 weeks

　　The purpose of video interview視頻面試要求

　　The purpose of video interview is simply to see each other as "Seeing is Believing".

　　And precisely, we'd like to hear from you about your company, brand, business history, expertise, target

　　market, sales force, etc., in addition to the inquiry to

　　what you reported.