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#f30;"></span></p><p><span>產(chǎn)品關(guān)鍵詞：</span>華東師范大學(xué)音頻哪家便宜,音頻</p><p><span>***更新：</span>2021-01-22 01:09:57</p><p><span id="click" >瀏覽次數(shù)：0次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="3wn2wqm" 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="7ryvrlx" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="3yfhjqh" 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，華東師范大學(xué)音頻哪家便宜、雙指向性、單指向性和可變指向性。在音頻系統(tǒng)中阻抗匹配問題：電聲設(shè)備的連接中，華東師范大學(xué)音頻哪家便宜，對(duì)于前后級(jí)阻抗的處理方式有兩種，一種是阻抗匹配，華東師范大學(xué)音頻哪家便宜，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。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。華東師范大學(xué)音頻哪家便宜</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="華東師范大學(xué)音頻哪家便宜,音頻" src="https://tyunfile.71360.com/UploadFile/huaiyan/637414038817954604/6552052.png"></div><p style="text-indent:25px">振幅：在特定的瞬間高于或低于坐標(biāo)零線的距離稱為該波形的振幅，而正或負(fù)向的大漂移則分別為正或負(fù)的峰值振幅。表示聲音單位的強(qiáng)弱。頻率：一秒鐘內(nèi)首尾銜接的周波數(shù)稱為波形的頻率，以赫茲（HZ）為計(jì)算單位，指每秒的周波數(shù)。與波長(zhǎng)和聲速有關(guān)。聲速：指聲波的傳播速度。在15度時(shí)聲波在空氣中的速度每秒接近340米，聲波的速度隨溫度而變，溫度每升高一度，聲波速度約增加0.9米。波形：與時(shí)間相關(guān)的振幅變化。波形有簡(jiǎn)單波和復(fù)合波，簡(jiǎn)單波是因?yàn)樗鼈兪沁B續(xù)的和重復(fù)的，而且它們?cè)诹愣壬舷率峭耆珜?duì)稱的。復(fù)合波是很多波的組合，它們不需要重復(fù)，而且在零度上下也不需要對(duì)稱。華東師范大學(xué)音頻哪家便宜音頻藝術(shù)專業(yè)的學(xué)生主要學(xué)習(xí)音樂、廣播、電影、電視音頻等方面的基本理論和基本知識(shí)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="華東師范大學(xué)音頻哪家便宜,音頻" src="https://tyunfile.71360.com/UploadFile/huaiyan/637414038729419531/318452.png"></div><p style="text-indent:25px">幾種立體聲音頻制式的聲學(xué)原理和各自優(yōu)缺點(diǎn)：時(shí)間差方式，A/B制，把兩只型號(hào)完全相同的單聲道傳聲器A.、B，按照一定的距離固定在雙頭支架上，這樣構(gòu)成AB制立體聲傳聲器。傳聲器可以是全向的，也可以是心形的。由于AB存在距離差別，聲波到達(dá)AB時(shí)總會(huì)存在時(shí)間差、相位差和強(qiáng)度差。AB制式的立體聲傳聲器，結(jié)構(gòu)簡(jiǎn)單，使用方便，立體聲效果顯著，但與單聲道的兼容性稍差。強(qiáng)度差方式，X/Y制式，把兩只性能完全相同的單聲道傳聲器一上一下同軸安裝在一起，構(gòu)成XY制，傳聲器的可以選擇心形或8字形。兩次傳聲器緊靠在一起，不存在距離差，因此不存在時(shí)間差和相位差，只存在聲音的強(qiáng)度差。重放效果和兼容性比AB制式好些，但立體聲效果不如AB制式。和差變換方式，M-S制式。使用一只心形傳聲器，一只8字形傳聲器，疊加而成的拾音方式。讓8字形橫過來對(duì)著兩邊拾音，心形指向正前方。但必須把傳聲器的輸出信號(hào)進(jìn)行和與差的變換后才能作為左右聲道信號(hào)使用。M-S制具有良好的立體聲效果和優(yōu)異的單聲道兼容性，聲場(chǎng)寬，但使用比較麻煩。</p><p style="text-indent:25px">雙耳效應(yīng)：盡管單耳耳廓的選聽功能對(duì)方位聽感有某些作用，但人是用兩耳聆聽的，對(duì)方位的感覺是依靠雙耳完成的，這就是雙耳效應(yīng)。人耳對(duì)方位感的作用機(jī)理：人耳在一定的聲學(xué)空間內(nèi)能夠?qū)β曉炊ㄎ坏哪芰ΨQ空間定位，取決于兩耳聽覺上的強(qiáng)度差、到達(dá)兩耳的時(shí)間差、耳廓的作用。雙耳的時(shí)間差和相位差是低頻的水平定位的主要因素，隨著頻率的提高，雙耳間的相位可能相同，這時(shí)聲壓差和音色差就成了水平定位的主要因素，人耳的縱向定位能力較差。早期反射聲：指經(jīng)過一次、兩次或多次反射后到達(dá)接受者的聲音，與混響不同，每個(gè)反射聲可以區(qū)分，可以改變聲音的音色、位置和空間感。雙軌立體聲音頻采用一對(duì)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="華東師范大學(xué)音頻哪家便宜,音頻" src="https://tyunfile.71360.com/UploadFile/huaiyan/637414038435708517/1254231.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(chǎng)擴(kuò)聲中提高平均電平。（4）對(duì)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”。音頻藝術(shù)專業(yè)對(duì)聲音記錄及處理的質(zhì)量要求很高。徐州南京藝術(shù)學(xué)院音頻機(jī)構(gòu)</p><p style="text-indent:25px">雙軌立體聲主要采用錄制傳統(tǒng)聲學(xué)樂隊(duì)，而多軌音頻多錄制流行音樂。華東師范大學(xué)音頻哪家便宜</p><p style="text-indent:25px">流動(dòng)旋律：RealAudio主要適用于在網(wǎng)絡(luò)上的在線音樂欣賞，大多數(shù)的用戶仍然在使用56Kbps或更低速率的Modem，所以典型的回放并非好的音質(zhì)。有的下載站點(diǎn)會(huì)提示你根據(jù)你的Modem速率選擇佳的Real文件。real的的文件格式主要有這么幾種：有RA（RealAudio）、RM（RealMedia，RealAudio G2）、RMX（RealAudio Secured），還有更多。這些格式的特點(diǎn)是可以隨網(wǎng)絡(luò)帶寬的不同而改變聲音的質(zhì)量，在保證大多數(shù)人聽到流暢聲音的前提下，令帶寬較富裕的聽眾獲得較好的音質(zhì)。隨著網(wǎng)絡(luò)帶寬的普遍改善，Real公司正推出用于網(wǎng)絡(luò)廣播的、達(dá)到CD音質(zhì)的格式。如果你的RealPlayer軟件不能處理這種格式，它就會(huì)提醒你下載一個(gè)**的升級(jí)包。許多音樂網(wǎng)站提供了歌曲的Real格式的試聽版本。現(xiàn)在新的版本是RealPlayer 11。華東師范大學(xué)音頻哪家便宜</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2949941.html</p></div></div></div></div></div><div id="7bn3ypw" class="page-right twoColRt"><div id="5j7d7sz" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="s2x88xu" class="recomPic likePro"><a href="http://www.cdcfah.com/cp/814588.html"><div><img src="http://tyunfile.71360.com/UpLoadFile/2019/11/1/14/637082168864691056_lgpj_5374157.jpg" alt="福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></div><p>福建ZF配件哪家強(qiáng) 信息推薦自業(yè)物資供應(yīng)</p></a></div><div id="vpczwdk" class="recomPic likePro"><a 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