藍(lán)牙耳機(jī)聲學(xué)講座(存儲(chǔ)版)
【正文】 嘴 Mic單體間距離由算法需求決定，通常(tōngch225。 fen),Receiving聲腔的作用 Receiver前后聲波的振幅相同，相位相反 隔離前后聲波，防止聲干預(yù)、短路(duǎnl249。,RECEIVER聲腔、出音孔對(duì)頻響曲線(xiàn)(qūxi224。tǒng)不穩(wěn)定，沒(méi)有及時(shí)發(fā)現(xiàn)不良 S部門(mén)NPI沒(méi)有藍(lán)牙耳機(jī)的制作經(jīng)驗(yàn)，對(duì)聲腔密封與音頻對(duì)應(yīng)關(guān)系沒(méi)什么觀念,控制點(diǎn)膠位置,導(dǎo)光柱,解決方案 點(diǎn)膠到定位柱為止，導(dǎo)光柱周邊不打膠 產(chǎn)線(xiàn)增加測(cè)試receiver assembly音頻,第二十六頁(yè)，共二十九頁(yè)。描述SPEAKER性能的參數(shù)〔典型參數(shù)〕。前腔出聲(chū shēnɡ)孔：聲孔變小意味著前腔變大，3KHz附近有一個(gè)頻響峰,第二十九頁(yè)，共二十九頁(yè)。帶動(dòng)振膜一起運(yùn)動(dòng)，振膜籌劃空氣發(fā)出相應(yīng)的聲音。sh236。0.8，超過(guò)216。,Lesson Learn1 Black bird,Risk: Open design for microphone may lead to echo issue. Cause: 1. Mic unit is located on PCBA without mic boot. 2. Mic holes on bottom cover can be blocked when headset is being worn. Solution: 1. Add two slots on the edge of bottom cover which will not be blocked by face 2. Add an acoustic fabric in the back cavity of speaker housing, it will kill the resonance from speaker back cavity.,Two slots are added,Mic holes,Lesson: Be cautious of acoustic performance if there’s a risk for the mic holes being blocked. Avoid to use open design for microphone Do more verifications using mockup samples,第二十三頁(yè)，共二十九頁(yè)。 fen),單體的選擇： Omnidirectional。n y225。)指標(biāo)及測(cè)量方法,第十六頁(yè)，共二十九頁(yè)。)模式 支持44.1KHz/16bit采樣率，CD音質(zhì)，對(duì)頻響曲線(xiàn)要求較高，一般20Hz20KHz 不支持Uplink,第十四頁(yè)，共二十九頁(yè)。sh236。,SPEAKER的測(cè)試方法,聲學(xué)(shēngxu233。,聲學(xué)(shēngxu233。,SPEAKER與RECEIVER的區(qū)別(qūbi233。)根底知識(shí),SPEAKER 發(fā)聲(fā shēnɡ)原理,磁路系統(tǒng)構(gòu)
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