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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>蘇州上海戲劇學(xué)院音頻專業(yè),音頻</p><p><span>***更新：</span>2021-01-14 02:14:20</p><p><span id="click" >瀏覽次數(shù)：2次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="3kbno7a" 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="gu8mie8" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="knb8drn" class="box"><p><p style="text-indent:25px">拾音器的工作原理和分類：拾音器是一種把聲音信號(hào)轉(zhuǎn)換為電信號(hào)的換能器件。有聲學(xué)系統(tǒng)、機(jī)械系統(tǒng)和電學(xué)系統(tǒng)三部分組成。分類：（1）按換能原理分電容傳聲器、駐極體傳聲器、動(dòng)圈傳聲器、碳粒式傳聲器和壓電式傳聲器。（2）按聲波作用于膜片的不同方式分壓強(qiáng)式、壓差式和壓強(qiáng)壓差復(fù)合式。（3）按指向性分全指向性、雙指向性，蘇州上海戲劇學(xué)院音頻專業(yè)、單指向性和可變指向性，蘇州上海戲劇學(xué)院音頻專業(yè)。在音頻系統(tǒng)中阻抗匹配問(wèn)題：電聲設(shè)備的連接中，蘇州上海戲劇學(xué)院音頻專業(yè)，對(duì)于前后級(jí)阻抗的處理方式有兩種，一種是阻抗匹配，一種是跨接的方式。阻抗匹配就是指前一級(jí)設(shè)備的輸出阻抗與后一級(jí)設(shè)備輸入阻抗相等。連接方式是基于大功率傳輸原理。音頻主要培養(yǎng)具備聲音藝術(shù)與音頻技術(shù)等多學(xué)科交叉方面的基本理論知識(shí)。蘇州上海戲劇學(xué)院音頻專業(yè)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="蘇州上海戲劇學(xué)院音頻專業(yè),音頻" src="https://tyunfile.71360.com/UploadFile/huaiyan/637414038817954604/6552052.png"></div><p style="text-indent:25px">人類聽(tīng)覺(jué)的頻響特征：頻率響應(yīng)指人的聽(tīng)覺(jué)系統(tǒng)或電聲設(shè)備對(duì)各種頻率成分的反映能力。特征：（1）聲壓級(jí)越高，人的聽(tīng)覺(jué)頻響會(huì)越趨平直，而隨著聲音聲壓級(jí)的降低，人的聽(tīng)覺(jué)頻響會(huì)相應(yīng)變壞，其中低頻尤甚。（2）人耳對(duì)于高于18—20KHZ和低于16—20HZ的聲音不論聲壓級(jí)多高，一般不會(huì)聽(tīng)到，因此，可以認(rèn)為20HZ—20KHZ是人類的聽(tīng)覺(jué)頻帶，20HZ—20KHZ稱之為“聲頻”“可聞聲”。高于20KHZ稱“超聲”，低于20HZ聲音稱“次聲”。（3）不論聲壓級(jí)高低，人們對(duì)3KHZ—5KHZ的聲音為敏感。南京上海師范大學(xué)音頻收費(fèi)標(biāo)準(zhǔn)其實(shí)任何我們可以聽(tīng)見(jiàn)的聲音經(jīng)過(guò)音頻線或話筒的傳輸都是一系列的模擬信號(hào)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="蘇州上海戲劇學(xué)院音頻專業(yè),音頻" src="https://tyunfile.71360.com/UploadFile/huaiyan/637414038372739833/7145334.png"></div><p style="text-indent:25px">音頻的屬性：大家都承認(rèn)是一個(gè)數(shù)碼時(shí)代，為追求優(yōu)良的音質(zhì)很多人做出了不懈的努力。隨著數(shù)碼時(shí)代的來(lái)臨，數(shù)字信號(hào)比模擬信號(hào)優(yōu)越已成為共識(shí)。什么是模擬信號(hào)？其實(shí)任何我們可以聽(tīng)見(jiàn)的聲音經(jīng)過(guò)音頻線或話筒的傳輸都是一系列的模擬信號(hào)。模擬信號(hào)是我們可以聽(tīng)見(jiàn)的。而數(shù)字信號(hào)就是用一堆數(shù)字記號(hào)(其實(shí)只有二進(jìn)制的1和0)來(lái)記錄聲音，而不是用物理手段來(lái)保存信號(hào)（用普通磁帶音頻就是一種物理方式）。我們實(shí)際上聽(tīng)不到數(shù)字信號(hào)。這樣我們可以簡(jiǎn)略地比較一下模擬時(shí)代的音頻制作與數(shù)碼時(shí)代的區(qū)別：模擬時(shí)代是把原始信號(hào)以物理方式錄制到磁帶上（當(dāng)然在音頻棚里完成了），然后加工、剪接、修改，然后錄制到磁帶、LP等廣大聽(tīng)眾可以欣賞的載體上。</p><p style="text-indent:25px">我們注意一下身邊的CD片就會(huì)看到很多CD都有如：ADD、AAD、DDD等標(biāo)記。三個(gè)字母按順序各表示該片在音頻、編輯、成品三個(gè)過(guò)程中所使用的方法，是模擬(Analog)還是數(shù)字(Digital)。當(dāng)然A表示模擬，D表示數(shù)字。AAD就說(shuō)明其音頻和編輯是用模擬方式的，而然后灌片是用數(shù)字方式的，這類唱片多是將過(guò)去錄制的音樂(lè)轉(zhuǎn)成CD片而不做任何修改。ADD則是有一個(gè)修改過(guò)程。許多古典音樂(lè)大師的演奏或指揮多錄制于模擬時(shí)代，我們聽(tīng)到的CD是經(jīng)過(guò)修改后灌錄的，很多這類唱片都有標(biāo)記ADD。而DDD的唱片必然是較現(xiàn)代的音頻品。自然，CD片必然以D結(jié)尾，而磁帶可以姑且認(rèn)為是AAA，雖然好像并沒(méi)有這種說(shuō)法。質(zhì)量的音頻師必須能夠根據(jù)自己對(duì)影視腳本的理解與感悟以及導(dǎo)演的創(chuàng)作意圖。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="蘇州上海戲劇學(xué)院音頻專業(yè),音頻" src="https://tyunfile.71360.com/UploadFile/huaiyan/637414038759321840/9224192.png"></div><p style="text-indent:25px">MP3格式壓縮音樂(lè)的采樣頻率有很多種，可以用64Kbps或更低的采樣頻率節(jié)省空間，也可以用320Kbps的標(biāo)準(zhǔn)達(dá)到極高的音質(zhì)。我們用裝有Fraunhofer IIS Mpeg Lyaer3的 MP3編碼器（現(xiàn)在效果好的編碼器）MusicMatch Jukebox 6.0在128Kbps的頻率下編碼一首3分鐘的歌曲，得到2.82MB的MP3文件。采用缺省的CBR（固定采樣頻率）技術(shù)可以以固定的頻率采樣一首歌曲，而VBR（可變采樣頻率）則可以在音樂(lè)“忙”的時(shí)候加大采樣的頻率獲取更高的音質(zhì)，不過(guò)產(chǎn)生的MP3文件可能在某些播放器上無(wú)法播放。我們把VBR的級(jí)別設(shè)定成為與前面的CBR文件的音質(zhì)基本一樣，生成的VBR MP3文件為2.9MB。聲波：聲音機(jī)械振動(dòng)引起周圍彈性媒質(zhì)發(fā)生波動(dòng)的現(xiàn)象。蘇州上海戲劇學(xué)院音頻專業(yè)</p><p style="text-indent:25px">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。蘇州上海戲劇學(xué)院音頻專業(yè)</p><p style="text-indent:25px">多普勒效應(yīng)：在傳輸系統(tǒng)中因聲源與聽(tīng)者之間的有效距離隨時(shí)間改變，而聽(tīng)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(jué)頻率為2：1的相關(guān)音響，這一比率關(guān)系是構(gòu)成音樂(lè)八度音程的基礎(chǔ)，音樂(lè)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(méi)有聲波時(shí)的壓強(qiáng)。單位為帕。聲壓級(jí)：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(duì)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(guò)載電平之間的范圍，用峰值余量和信噪比的圖表來(lái)完整地表示。蘇州上海戲劇學(xué)院音頻專業(yè)</p></p><br /><p>文章來(lái)源地址: 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