青浦區(qū)住宅噪聲檢測機構(gòu)電話抱誠守真上海綠環(huán)商品檢測供應(yīng)-b2b網(wǎng)站_b2b電子商務(wù)平臺【買產(chǎn)品】-上?？谄蚴称酚邢薰?/title><meta name="description" content="頻譜分析法：各種噪聲源都有不同的頻率特性，如發(fā)動機噪聲與氣缸內(nèi)燃油燃燒的發(fā)火頻率有關(guān)，風(fēng)扇噪聲與扇葉頻率有關(guān)，進、排氣噪聲與進、排氣門的開閉頻率有關(guān)，齒輪噪聲與基節(jié)頻率有關(guān)等，青浦區(qū)住宅噪聲檢測機構(gòu)電話。噪聲的頻譜分析法就是利用汽車上各個噪"><meta name="keywords" content="青浦區(qū)住宅噪聲檢測機構(gòu)電話,噪聲檢測"><link rel="canonical" href="http://www.cdcfah.com/"/><meta name="applicable-device" content="pc"><link rel="shortcut icon" href="/static/new_net_01/images/favicon.ico"><link rel="stylesheet" href="/static/new_net_01/css/slick.css" /><link rel="stylesheet" href="/static/new_net_01/css/addnew.css"><link rel="stylesheet" href="/static/new_net_01/css/sidenav.css"><link rel="stylesheet" href="/static/new_net_01/css/style.css" /><link rel="stylesheet" href="/static/new_net_01/css/tab.css"><link rel="stylesheet" href="/static/new_net_01/css/404.css"> <meta name="baidu-site-verification" content="OBVzrC9aaQ" /> <meta 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clearfix"><p class="current"> 當(dāng)前位置:<a href="http://www.cdcfah.com/">首頁?<a href="http://www.cdcfah.com/cp/">產(chǎn)品供應(yīng)</a>?<a href="http://www.cdcfah.com/cp/first-_huanbao/">環(huán)保</a>?<a href="http://www.cdcfah.com/cp/second-huanbao_hjjcyq/">環(huán)境檢測儀器</a>?<a href="http://www.cdcfah.com/cp/third-hjjcyq_zaoyinjipy/">噪音計</a>?青浦區(qū)住宅噪聲檢測機構(gòu)電話抱誠守真上海綠環(huán)商品檢測供應(yīng)</p><div id="2ykho23" class="leftbox clearfix"><h1>青浦區(qū)住宅噪聲檢測機構(gòu)電話抱誠守真上海綠環(huán)商品檢測供應(yīng)</h1><div id="8tvsut3" class="proBig"><div id="x3lkbip" class="bigimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/SHLHJC1/637449324890047773/7662206.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="dhrx834" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/SHLHJC1/637449324890047773/7662206.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="xbqis8m" class="content"><p><span>需求數(shù)量：</span>0</p><p><span>價格要求：</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>青浦區(qū)住宅噪聲檢測機構(gòu)電話,噪聲檢測</p><p><span>***更新：</span>2021-01-15 01:17:08</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="et44ubd" class="rightbox"><h3>公司基本資料信息</h3><p style="border:0;"><a rel="nofollow">上海綠環(huán)商品檢測有限公司</a></p><p><span>聯(lián)系人：</span>程莉君</p><p><span>郵箱: </span>chenglijun139@163.com</p><p><span>電話: </span>18717976244</p><p><span>傳真: </span>021_62384557</p><p><span>網(wǎng)址: </span>http://www.x-gpi.com</p><p><span>手機: </span>021-62398830</p><p><span>地址: </span>綏德路2弄8號第四層</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="yx9eq7a" class="page-proshow02"><p class="title">詳細(xì)說明</p><div id="akevsmn" class="box"><p><p style="text-indent:25px">頻譜分析法：各種噪聲源都有不同的頻率特性，如發(fā)動機噪聲與氣缸內(nèi)燃油燃燒的發(fā)火頻率有關(guān)，風(fēng)扇噪聲與扇葉頻率有關(guān)，進、排氣噪聲與進、排氣門的開閉頻率有關(guān)，齒輪噪聲與基節(jié)頻率有關(guān)等，青浦區(qū)住宅噪聲檢測機構(gòu)電話。噪聲的頻譜分析法就是利用汽車上各個噪聲源產(chǎn)生的噪聲頻率不同來判斷哪個是主要噪聲源的分析方法。在汽車的噪聲譜中有時會遇到噪聲譜峰值所對應(yīng)的頻率由幾個噪聲源共同發(fā)出的噪聲所組成，此時為正確判斷噪聲源的主次關(guān)系，可適當(dāng)配合其它方法或改變汽車、發(fā)動機的運轉(zhuǎn)工況，青浦區(qū)住宅噪聲檢測機構(gòu)電話，重新獲取噪聲頻譜，分析這些頻譜成分的變化，從而識別出主要噪聲源。此外，由于聲音來源于振動，故聲輻射表面的振動譜與輻射噪聲之間有很好的相關(guān)性。因此，在難以準(zhǔn)確測定組成聲源的噪聲譜時，青浦區(qū)住宅噪聲檢測機構(gòu)電話，往往可利用該組成聲源表面的振動譜代替其噪聲譜來與總噪聲譜進行分析比較，以便確定主要噪聲源。噪聲監(jiān)測結(jié)果析噪聲污染的現(xiàn)狀及變化趨勢。青浦區(qū)住宅噪聲檢測機構(gòu)電話</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="青浦區(qū)住宅噪聲檢測機構(gòu)電話,噪聲檢測" src="https://tyunfile.71360.com/UploadFile/SHLHJC1/637449324890047773/7662206.png"></div><p style="text-indent:25px">我國環(huán)境噪聲監(jiān)測體系：我國建立了三級環(huán)境噪聲監(jiān)測網(wǎng)絡(luò)體系，即，省級和城市級。我國控環(huán)境噪聲監(jiān)測網(wǎng)絡(luò)是1986年確定的，國控環(huán)境噪聲網(wǎng)絡(luò)站的選擇是按照當(dāng)年由機構(gòu)環(huán)境保護領(lǐng)導(dǎo)小組辦公室（國家環(huán)保局的前身）所確定的錢國環(huán)境保護重點城市作為國家控制的環(huán)境噪聲監(jiān)測網(wǎng)絡(luò)站，包括省會城市，沿海開放城市，風(fēng)景旅游城市和歷史文化名城。省級環(huán)境噪聲監(jiān)測網(wǎng)絡(luò)一般由省轄市和縣級市環(huán)境監(jiān)測站組成，部分省份還包括縣城和建制鎮(zhèn)。城市環(huán)境監(jiān)測站組織市轄區(qū)，縣監(jiān)測站和有關(guān)行業(yè)，企業(yè)監(jiān)測站組成城市環(huán)境噪聲監(jiān)測網(wǎng)絡(luò)，進行道路交通噪聲，區(qū)域環(huán)境噪聲，功能區(qū)域聲的監(jiān)測和噪聲源監(jiān)測。普陀區(qū)低頻噪聲檢測機構(gòu)電話齒輪的傳播噪聲主要由端面輻射引起，端面面積越大。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="青浦區(qū)住宅噪聲檢測機構(gòu)電話,噪聲檢測" src="https://tyunfile.71360.com/UploadFile/SHLHJC1/637449324871053716/8633920.png"></div><p style="text-indent:25px">以銑床為噪聲檢測對象，其噪聲主要形式有：規(guī)律性噪聲，聲音有高有低，齒輪嚙合剛性的規(guī)律性變化對傳動噪聲的影響。嚙合剛性的變化是指齒輪傳動中，同時嚙合齒數(shù)不同，在一兩對之間變化而引起嚙合輪齒承受載荷的變化。當(dāng)一對輪齒嚙合時，所有負(fù)荷均作用于這對輪齒，會發(fā)生較大的變形量，噪聲較大；當(dāng)兩對輪齒嚙合時，其負(fù)荷由這兩對輪齒共同承受，每對輪齒的載荷縮小一半，此時輪齒會發(fā)生較小的變形量，噪聲較小。齒輪傳動誤差使從動齒輪的角速度滯后于主動齒輪的角速度，速度的瞬時變化會造成在從動齒輪齒頂處產(chǎn)生碰擊。在不同的載荷條件下，齒輪傳動產(chǎn)生的噪聲大小不同。</p><p style="text-indent:25px">我國環(huán)境噪聲監(jiān)測布點方法和采樣技術(shù)：我國環(huán)境噪聲監(jiān)測布點根據(jù)不同的測量內(nèi)容選用不同的布點方法。監(jiān)測道路交通噪聲時，按自然路段布點；對區(qū)域環(huán)境噪聲，在測量區(qū)域內(nèi)按等面積網(wǎng)格法均勻布點；功能區(qū)噪聲定期監(jiān)測，在每一功能區(qū)內(nèi)，選擇功能特征明顯，替代性強的位置布設(shè)一個測點，進行晝夜24小時連續(xù)監(jiān)測。我國的環(huán)境噪聲采樣技校術(shù)主要取決于所用噪聲監(jiān)測儀器的性能，在早期，主要使用指針式聲級計監(jiān)測，隨著噪聲測量儀器性能的不斷完善，多種具有數(shù)據(jù)存貯和數(shù)理統(tǒng)計的聲級計逐步應(yīng)用于環(huán)境噪聲監(jiān)測領(lǐng)域。噪聲又稱雜音，屬于隨機信號，可用統(tǒng)計學(xué)方法加以描述，即其統(tǒng)計量是可測的。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="青浦區(qū)住宅噪聲檢測機構(gòu)電話,噪聲檢測" src="https://tyunfile.71360.com/UploadFile/SHLHJC1/637449324825272384/4274578.png"></div><p style="text-indent:25px">噪聲的壞處：使工作效率降低。研究發(fā)現(xiàn)，噪聲超過85分貝，會使人感到心煩意亂，人們會感覺到吵鬧，因而無法專心地工作，結(jié)果會導(dǎo)致工作效率降低。損傷聽覺、視覺部位我們都有這樣的經(jīng)驗，從飛機里下來或從鍛壓車間出來，耳朵總是嗡嗡作響，甚至聽不清對方說話的聲音，過一會兒才會恢復(fù)。這種現(xiàn)象叫做聽覺疲勞，是人體聽覺部位對外界環(huán)境的一種保護性反應(yīng)。如果人長時間遭受強烈噪聲作用，聽力就會減弱，進而導(dǎo)致聽覺部位的器質(zhì)性損傷，造成聽力下降。強的噪聲可以引起耳部的不適，如耳鳴、耳痛、聽力損傷。據(jù)測定，超過115 分貝的噪聲還會造成耳聾。據(jù)臨床醫(yī)學(xué)統(tǒng)計，若在80分貝以上噪音環(huán)境中生活，造成耳聾者可達50％。醫(yī)學(xué)**研究認(rèn)為，家庭噪音是造成兒童聾啞的病因之一。噪聲的特征，即聲壓的各種頻率組成成分。普陀區(qū)低頻噪聲檢測機構(gòu)電話</p><p style="text-indent:25px">無規(guī)則變化噪聲應(yīng)測量若干時間段內(nèi)的等效聲級及每個時間段內(nèi)的較大值。青浦區(qū)住宅噪聲檢測機構(gòu)電話</p><p style="text-indent:25px">噪聲預(yù)測分析：計算方法及模型根據(jù)水平面噪聲分布情況測試結(jié)果推測，由于橋梁高架道路本身所特有的噪聲自屏蔽，橋梁下方形成聲影區(qū)，導(dǎo)致距離噪聲源較遠(yuǎn)的測點噪聲值反而高于距離近的測點。由于項目處于初步設(shè)計階段，無法通過現(xiàn)場檢測獲知不同高度處的聲壓級，因此基于平面檢測結(jié)果，采用計算軟件對設(shè)計建筑立面進行噪聲分析，同時還能精確計算出水平面各區(qū)域噪聲分布情況。CadnaA(Computer Aided Noise Abatement)是一套用于計算、顯示、評估及預(yù)測噪聲暴露和空氣污染影響的軟件，可精確計算交通噪聲影響。將現(xiàn)場檢測值作為輸入邊界條件，通過計算機模擬，得出水平面、噪聲敏感建筑立面聲壓分布情況。青浦區(qū)住宅噪聲檢測機構(gòu)電話</p><p style="text-indent:25px">上海綠環(huán)商品檢測有限公司專注技術(shù)創(chuàng)新和產(chǎn)品研發(fā)，發(fā)展規(guī)模團隊不斷壯大。公司目前擁有較多的高技術(shù)人才，以不斷增強企業(yè)重點競爭力，加快企業(yè)技術(shù)創(chuàng)新，實現(xiàn)穩(wěn)健生產(chǎn)經(jīng)營。公司以誠信為本，業(yè)務(wù)領(lǐng)域涵蓋環(huán)境監(jiān)測，公共場所衛(wèi)生檢測，建設(shè)工程衛(wèi)生學(xué)評價，室內(nèi)空氣檢測，我們本著對客戶負(fù)責(zé)，對員工負(fù)責(zé)，更是對公司發(fā)展負(fù)責(zé)的態(tài)度，爭取做到讓每位客戶滿意。公司力求給客戶提供全數(shù)良好服務(wù)，我們相信誠實正直、開拓進取地為公司發(fā)展做正確的事情，將為公司和個人帶來共同的利益和進步。經(jīng)過幾年的發(fā)展，已成為環(huán)境監(jiān)測，公共場所衛(wèi)生檢測，建設(shè)工程衛(wèi)生學(xué)評價，室內(nèi)空氣檢測行業(yè)出名企業(yè)。</p></p><br /><p>文章來源地址: http://www.cdcfah.com/cp/2848674.html</p></div></div></div></div></div><div id="mbvh3ax" class="page-right twoColRt"><div id="bgawovx" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="nxzls8z" class="recomPic likePro"><a 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