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class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價(jià)格要求：</span>面議</p><p><span>所在地：</span>上海市</p><p><span>包裝要求：</span><span style="color: #f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>浙江制作音頻專業(yè),音頻</p><p><span>***更新：</span>2021-01-27 03:10:00</p><p><span id="click" >瀏覽次數(shù)：3次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="oizl43s" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海懷嚴(yán)文化傳媒有限公司</a></p><p><span>聯(lián)系人：</span>曹晨光</p><p><span>郵箱: </span>deforu@163.com</p><p><span>電話: </span>13611988611</p><p><span>傳真: </span>021_</p><p><span>網(wǎng)址: </span>http://www.oranshine.com</p><p><span>手機(jī): </span>021-64458098</p><p><span>地址: </span>宜山路508號(hào)3E室</p><p>[當(dāng)前離線] <a rel="nofollow"> [加為商友] </a><a rel="nofollow"> [發(fā)送信件] </a></p></div></div><div id="ncofjpg" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="lk8f3p9" class="box"><p><p style="text-indent:25px">頻程的含義：頻程又成頻帶。兩個(gè)聲或其他信號(hào)的頻率間的距離，是頻率的相對尺度。以高頻與低頻的率比的對數(shù)來表示。此對數(shù)通常以2為底，單位稱為倍頻程（oct）。也可以以10為底的對數(shù)表示，此時(shí)單位為10倍程（decede）。把20～20000HZ可聞聲頻率變化范圍劃分成的若干個(gè)較小的段落，浙江制作音頻專業(yè)。通常劃分為10段頻程或30段頻程，也稱頻帶。立體聲擴(kuò)展技術(shù)原理：使一只揚(yáng)聲器的信號(hào)相對于另一只揚(yáng)聲器的作相移能引起聽覺幻想在一定程度上的擴(kuò)展，稱之為立體聲擴(kuò)展技術(shù)。相移度為0度時(shí)，產(chǎn)生定位在中間的幻想，為點(diǎn)聲源。相移為---135度時(shí)，聲像開始擴(kuò)大，為面聲源。相移度超過135度時(shí)，聲像開始分開，浙江制作音頻專業(yè)，聲像不自然。相移度到達(dá)180度時(shí)，浙江制作音頻專業(yè)，即產(chǎn)生“倒相”，定位完全含糊不清。聲音的聲學(xué)特性如音的高低等都可以用計(jì)算機(jī)硬盤文件的方式儲(chǔ)存下來。浙江制作音頻專業(yè)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="浙江制作音頻專業(yè),音頻" src="https://tyunfile.71360.com/UploadFile/huaiyan/637414038872427268/8681380.png"></div><p style="text-indent:25px">采樣：是一個(gè)以某一時(shí)間間隔迅速采集信號(hào)振幅的過程，速度越快聲音越逼真，采樣法則表明這一過程必須至少比音頻的2個(gè)周期時(shí)間稍快。信噪比：指在媒介基準(zhǔn)電平以下的媒介或傳輸路徑中的噪聲值。失真：指任何不需要的信號(hào)變化，噪聲除外，分線性失真和非線性失真，線性失真包括頻響和相位方面的誤差，表現(xiàn)為具有可經(jīng)過相反的等量信號(hào)處?？蛇€原的特征。非線性由于有新的頻率產(chǎn)生，通常不可還原。帶通濾波器：一種電子濾波器，用以使某一范圍的頻率通過，而范圍外的頻率被限制通過的設(shè)備，可以通過高通濾波和低通濾波組合實(shí)現(xiàn)。帶阻濾波器：用來限制某一范圍內(nèi)的頻率通過而范圍外的頻率則被通過的設(shè)備，常用于消除某一頻率的噪聲。浙江制作音頻專業(yè)現(xiàn)在音響創(chuàng)作人員需要具備多種素質(zhì)，既要熟練掌握高技術(shù)的設(shè)備來完成復(fù)雜的音頻工作。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="浙江制作音頻專業(yè),音頻" src="https://tyunfile.71360.com/UploadFile/huaiyan/637414038515259363/9916345.png"></div><p style="text-indent:25px">多普勒效應(yīng)：在傳輸系統(tǒng)中因聲源與聽者之間的有效距離隨時(shí)間改變，而聽到的聲波頻率有所改變的聲現(xiàn)象，或由于聲源或者接受者的移動(dòng)而產(chǎn)生的頻率變換效應(yīng)，稱之為多普勒效應(yīng)。倍頻程：人耳特別能夠察覺頻率為2：1的相關(guān)音響，這一比率關(guān)系是構(gòu)成音樂八度音程的基礎(chǔ)，音樂的八度音程在聲學(xué)上稱為倍頻程。聲壓：聲擾動(dòng)而產(chǎn)生的逾量壓強(qiáng)。逾量壓強(qiáng)=聲波存在時(shí)的壓強(qiáng)---沒有聲波時(shí)的壓強(qiáng)。單位為帕。聲壓級：表示聲壓的一個(gè)量度值，分貝：是貝爾的十分之一。分貝等于音量的振幅除以基準(zhǔn)振幅的對數(shù)比例。動(dòng)態(tài)范圍：以分貝為單位，表示一個(gè)媒介從背景噪聲電平到過載電平之間的范圍，用峰值余量和信噪比的圖表來完整地表示。</p><p style="text-indent:25px">回聲（殘響）：一個(gè)聲源的信號(hào)的不連續(xù)反復(fù)，與混響不同在于其聲音間隔更**于50-80毫秒。白噪聲：包含所有頻率且各頻率聲能的增量都相等的一種隨機(jī)信號(hào)，在還音過程中，白噪聲聽起來非常明亮，因?yàn)?0KHZ到20KHZ的高頻范圍內(nèi)和0HZ到10KHZ之間包含的白噪聲能量是相同的。粉紅噪聲：各倍頻程中聲能相等的隨機(jī)噪聲，利用粉紅噪聲以及實(shí)時(shí)頻譜分析儀可以測試聲音系統(tǒng)。衍射：指聲波有繞過或通過聲學(xué)障礙物的固有能力。是聲音能夠在死角被聽見的屬性，原因是當(dāng)聲音到達(dá)障礙物時(shí)會(huì)產(chǎn)生彎曲現(xiàn)象。擴(kuò)散：聲音遇到障礙物就會(huì)產(chǎn)生反射現(xiàn)象，良好的擴(kuò)散會(huì)產(chǎn)生平滑的混響聲，而不會(huì)產(chǎn)生回聲那樣不連續(xù)的聲音。音頻：聲音以電子或者其他方式在媒介上的存在形式，并非聲音本身。雙軌立體聲音頻采用一對立體聲話筒為主傳聲器，加若干輔助傳聲器的方式進(jìn)行音頻。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="浙江制作音頻專業(yè),音頻" src="https://tyunfile.71360.com/UploadFile/huaiyan/637414038545269068/3793869.png"></div><p style="text-indent:25px">壓縮器的功能：壓縮器是一種放大器，具有壓縮閥，低于閥值的輸入信號(hào)以固有的增益給予放大，高于閥值的輸入信號(hào)則按照特定的壓縮比進(jìn)行壓縮。一般有門限、啟動(dòng)時(shí)間、恢復(fù)時(shí)間和壓縮比可調(diào)。功能：（1）壓縮器可以避免削波失真，提高信噪比。（2）可以避免電平過高引起信號(hào)饋入而保護(hù)傳聲器和音箱。（3）在現(xiàn)場擴(kuò)聲中提高平均電平。（4）對傳聲器、電聲設(shè)備信號(hào)起到音量平衡作用。（5）改善音質(zhì)。（6）用于產(chǎn)生所謂的“潛入效果”或產(chǎn)生某些“特技效果音”。人類能夠聽到的所有聲音都稱之為音頻，它可能包括噪音等。徐州網(wǎng)課音頻管理</p><p style="text-indent:25px">傳聲器可以是全向的，也可以是心形的。浙江制作音頻專業(yè)</p><p style="text-indent:25px">“差拍”現(xiàn)象產(chǎn)生的原因：差拍指兩個(gè)頻率幾近相同的聲音疊加時(shí)，由于人耳不能將兩個(gè)音高相近的音分開，當(dāng)兩個(gè)聲波同向時(shí)，它們的合成是兩個(gè)波的和，而當(dāng)兩個(gè)波反向時(shí)，它們的合成是兩波之間的差。兩個(gè)頻率的差就是它們的拍頻。兩個(gè)聲波相遇引起振動(dòng)的疊加，在同方向上振動(dòng)，其疊加振動(dòng)后波形始終在某點(diǎn)上相互加強(qiáng)，方向相反時(shí)候相互干擾，兩個(gè)不同頻率有疊加引起的現(xiàn)象。掩蔽效應(yīng)的定義：掩蔽效應(yīng)指人耳在聽到強(qiáng)音時(shí)難以聽到弱音的現(xiàn)象，尤其頻率相近的聲音。當(dāng)聲音的頻率與掩蓋的噪聲的頻率比較接近時(shí)，以及聲音的方向與掩蓋噪聲的方向比較接近時(shí)，掩蓋效應(yīng)為明顯。掩蔽效應(yīng)應(yīng)是后期混音處理中使立體聲聲像定位與頻率均衡顯得尤為重要的原因，為使各樂器聲部清晰，應(yīng)進(jìn)行頻率均衡和聲像方位處理。浙江制作音頻專業(yè)</p></p><br 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