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class="container clearfix tcPro"><section class="home-main container clearfix"><div id="xcy7ifn" class="twoCol"><div id="yyb8yng" class="page-proshow clearfix"><p class="current"> 當(dāng)前位置:<a href="http://m.cdcfah.com/">首頁(yè)?<a href="http://m.cdcfah.com/cp/">產(chǎn)品供應(yīng)</a>?<a href="http://m.cdcfah.com/cp/first-_huanbao/">環(huán)保</a>?<a href="http://m.cdcfah.com/cp/second-huanbao_hjjcyq/">環(huán)境檢測(cè)儀器</a>?<a href="http://m.cdcfah.com/cp/third-hjjcyq_zaoyinjipy/">噪音計(jì)</a>?松江區(qū)高速公路噪聲檢測(cè)公司歡迎咨詢上海綠環(huán)商品檢測(cè)供應(yīng)</p><div id="ytjdn7g" class="leftbox clearfix"><h1>松江區(qū)高速公路噪聲檢測(cè)公司歡迎咨詢上海綠環(huán)商品檢測(cè)供應(yīng)</h1><div id="vkzwqsg" class="proBig"><div id="yxhfedc" 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="xsrq422" 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="mjjiwqp" 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>松江區(qū)高速公路噪聲檢測(cè)公司,噪聲檢測(cè)</p><p><span>***更新：</span>2021-01-09 00:31:27</p><p><span id="click" >瀏覽次數(shù)：5次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="fffutxh" 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(cè)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(jī): </span>021-62398830</p><p><span>地址: </span>綏德路2弄8號(hào)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="ee8p2tp" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="b3horrw" class="box"><p><p style="text-indent:25px">噪聲是一種惡性刺激物，長(zhǎng)期作用于人的系統(tǒng)，可使大腦皮層的興奮和克制失調(diào)，條件反射異常，出現(xiàn)頭暈、，松江區(qū)高速公路噪聲檢測(cè)公司、耳鳴、多夢(mèng)、、心慌、記憶力減退、注意力不集中等癥狀，嚴(yán)重者可產(chǎn)生精神錯(cuò)亂。這種癥狀，藥物治療療效很差，但當(dāng)脫離噪聲環(huán)境時(shí)，癥狀就會(huì)明顯好轉(zhuǎn)。噪聲可引起植物神經(jīng)系統(tǒng)功能紊亂，表現(xiàn)在血壓升高或降低，心率改變，心臟病加劇。噪聲會(huì)使人唾液、胃液分泌減少，胃酸降低，胃蠕動(dòng)減弱，食欲不振，松江區(qū)高速公路噪聲檢測(cè)公司，引起胃潰瘍。噪聲對(duì)人的內(nèi)分泌機(jī)能也會(huì)產(chǎn)生影響，如：導(dǎo)致女性性機(jī)能紊亂，月經(jīng)失調(diào)，流產(chǎn)率增加等。噪聲對(duì)兒童的智力發(fā)育也有不利影響，據(jù)調(diào)查，3歲前兒童生活在75分貝的噪聲環(huán)境里，松江區(qū)高速公路噪聲檢測(cè)公司，他們的心腦功能發(fā)育都會(huì)受到不同程度的損害，在噪聲環(huán)境下生活的兒童，智力發(fā)育水平要比安靜條件下的兒童低20％。噪聲對(duì)人的心理影響主要是使人煩惱、激動(dòng)、易怒，甚至失去理智。此外，噪聲還對(duì)動(dòng)物、建筑物有損害，在噪聲下的植物也生長(zhǎng)不好，有的甚至死亡。噪聲監(jiān)測(cè)是對(duì)干擾人們學(xué)習(xí)、工作和生活的聲音及其聲源進(jìn)行的監(jiān)測(cè)活動(dòng)。松江區(qū)高速公路噪聲檢測(cè)公司</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="松江區(qū)高速公路噪聲檢測(cè)公司,噪聲檢測(cè)" src="https://tyunfile.71360.com/UploadFile/SHLHJC1/637449324890047773/7662206.png"></div><p style="text-indent:25px">不同區(qū)域噪聲檢測(cè)方法：若是廠界存在圍墻，則噪聲檢測(cè)點(diǎn)必須在圍墻以上，應(yīng)根據(jù)實(shí)際狀況合理設(shè)置布點(diǎn)的數(shù)量。接下來(lái)要按照各噪聲測(cè)點(diǎn)位置開(kāi)展噪聲檢測(cè)工作，同時(shí)認(rèn)真記錄相關(guān)數(shù)據(jù)，確保將工業(yè)等場(chǎng)所噪聲檢測(cè)結(jié)果準(zhǔn)確顯示出來(lái)。三是建筑施工噪聲檢測(cè)。在建筑施工場(chǎng)地噪聲檢測(cè)過(guò)程中，應(yīng)從被檢測(cè)建筑物的建筑方案出發(fā)，將噪聲檢測(cè)位置與氛圍合理確定下來(lái)。應(yīng)較全掌握建筑物形成污染源位置，之后在建筑施工現(xiàn)場(chǎng)邊界線上選擇污染源較近的檢測(cè)點(diǎn)，并從施工現(xiàn)場(chǎng)實(shí)際情況出發(fā)，有針對(duì)性作出調(diào)整，保證獲得較佳的噪聲檢測(cè)結(jié)果。松江區(qū)高速公路噪聲檢測(cè)公司無(wú)規(guī)則變化噪聲應(yīng)測(cè)量若干時(shí)間段內(nèi)的等效聲級(jí)及每個(gè)時(shí)間段內(nèi)的較大值。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="松江區(qū)高速公路噪聲檢測(cè)公司,噪聲檢測(cè)" src="https://tyunfile.71360.com/UploadFile/SHLHJC1/637449324910438479/921874.png"></div><p style="text-indent:25px">目前的國(guó)內(nèi)聲學(xué)振動(dòng)測(cè)試領(lǐng)域主要存在下面三個(gè)問(wèn)題：一、設(shè)備專業(yè)性高，而懂聲振測(cè)試及分析的從業(yè)人員較少。二、常用的NVH測(cè)試設(shè)備、多通道高精度儀器都是國(guó)外的設(shè)備，軟件和硬件打包售賣，價(jià)格昂貴。三、特殊領(lǐng)域的測(cè)試系統(tǒng)比如高聲強(qiáng)測(cè)試國(guó)內(nèi)無(wú)通用裝備。而很多敏感領(lǐng)域，比如**，航空航天專業(yè)又無(wú)法使用國(guó)外產(chǎn)品。聲學(xué)振動(dòng)測(cè)試行業(yè)格局曾經(jīng)隨著DSP技術(shù)的發(fā)展有過(guò)重大變化，以模擬電路為信號(hào)處理主力的廠家不再有壟斷地位。而當(dāng)前隨著現(xiàn)代社會(huì)的發(fā)展，通信網(wǎng)和互聯(lián)網(wǎng)的普遍推廣和網(wǎng)絡(luò)延伸，同時(shí)智能手機(jī)的普及，各種移動(dòng)設(shè)備處理器的性能突飛猛進(jìn)，已經(jīng)遠(yuǎn)遠(yuǎn)超過(guò)單通道信號(hào)采集和實(shí)時(shí)簡(jiǎn)單處理的運(yùn)算能力要求?？梢韵胂?，與現(xiàn)有的通信網(wǎng)絡(luò)及智能設(shè)備的結(jié)合的聲學(xué)振動(dòng)測(cè)試設(shè)備將是行業(yè)格局變化的一個(gè)新的契機(jī)。</p><p style="text-indent:25px">噪聲檢測(cè)中應(yīng)注意的問(wèn)題：1.噪聲檢測(cè)布點(diǎn)問(wèn)題噪聲檢測(cè)布點(diǎn)關(guān)系著噪聲數(shù)據(jù)的收集，從當(dāng)前很多城市噪聲檢測(cè)布點(diǎn)情況來(lái)看，不僅設(shè)置問(wèn)題存在很大差異，同時(shí)也只是在交通要道與車流量較多的區(qū)域布設(shè)噪聲檢測(cè)點(diǎn)，這樣會(huì)導(dǎo)致收集的數(shù)據(jù)與資料不夠真實(shí)，缺乏實(shí)用性。各地區(qū)環(huán)境情況不一樣，噪聲污染也各不相同，因此要合理布設(shè)噪聲檢測(cè)點(diǎn)，這關(guān)系著是否能夠有效開(kāi)展噪聲檢測(cè)工作，除了在上述區(qū)域布設(shè)噪聲檢測(cè)點(diǎn)以后，還要擴(kuò)大布設(shè)范圍，保證監(jiān)測(cè)數(shù)據(jù)的真實(shí)性。2.噪聲檢測(cè)儀器設(shè)備問(wèn)題隨著噪聲污染的日益加重，我國(guó)也更加注重對(duì)噪聲污染的控制，在噪聲檢測(cè)工作中，相關(guān)儀器設(shè)備發(fā)揮著重要作用，如收集數(shù)據(jù)、控制噪聲污染等。一般要求電壓表的3dB帶寬△f3db大于8～10倍的噪聲帶寬。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="松江區(qū)高速公路噪聲檢測(cè)公司,噪聲檢測(cè)" src="https://tyunfile.71360.com/UploadFile/SHLHJC1/637449324825272384/4274578.png"></div><p style="text-indent:25px">噪聲測(cè)量的統(tǒng)計(jì)特性的測(cè)量：噪聲統(tǒng)計(jì)特性的測(cè)量屬于幅度域測(cè)量，包括數(shù)學(xué)期望（平均值），方差（均方值），功率譜密度、概率密度分布以及自相關(guān)和互相關(guān)函數(shù)的測(cè)量。通信線路噪聲的測(cè)量，就是在規(guī)定帶寬內(nèi)，噪聲均方值（功率）或均方根值（有效值）的測(cè)量。隨機(jī)信號(hào)電壓的測(cè)量與確知信號(hào)電壓的測(cè)量不同：①必須注意電壓表的檢波特性，有效值電壓表是測(cè)量噪聲電壓比較理想的儀表，這種電壓表的讀數(shù)與被測(cè)電壓的均方根值成正比，與被測(cè)電壓的波形無(wú)關(guān)，故若該電壓表以正弦有效值刻度，則可方便地直接讀出噪聲電壓的有效值。否則，需要對(duì)讀數(shù)進(jìn)行修正。例如，采用均值電壓表測(cè)量高斯白噪聲，必須將讀數(shù)乘上修正因數(shù)1．13。②帶寬準(zhǔn)則。噪聲功率正比于系統(tǒng)的帶寬，選用的電壓表其帶寬應(yīng)遠(yuǎn)大于被測(cè)系統(tǒng)的噪聲帶寬，否則，將會(huì)損失噪聲功率，使測(cè)量結(jié)果偏低。一般要求電壓表的3dB帶寬△f3db大于8～10倍的噪聲帶寬。當(dāng)齒輪精度要求不高時(shí)，或是該項(xiàng)誤差達(dá)不到精度要求，就會(huì)引起噪聲。松江區(qū)高速公路噪聲檢測(cè)公司</p><p style="text-indent:25px">必須注意電壓表的檢波特性，有效值電壓表是測(cè)量噪聲電壓比較理想的儀表。松江區(qū)高速公路噪聲檢測(cè)公司</p><p style="text-indent:25px">噪聲測(cè)定儀的測(cè)量方法:聲壓級(jí)測(cè)量?jī)墒制轿章暭?jí)計(jì)，將傳聲器指向被測(cè)聲源，計(jì)權(quán)網(wǎng)絡(luò)開(kāi)關(guān)置于“線性”位置，透明輸出旋鈕順時(shí)針轉(zhuǎn)到底，再調(diào)節(jié)黑色輸入旋鈕使指針有適當(dāng)偏轉(zhuǎn)，由透明輸出旋鈕兩條紅線所指的量程加上指示器指針的讀數(shù)，即可獲得所測(cè)聲壓級(jí)。例如：透明輸出旋鈕兩條紅線間指90dB，指針指示為+4dB，則被測(cè)聲壓級(jí)為90+4=94dB.當(dāng)所測(cè)聲壓級(jí)小，黑色輸入旋鈕置于70dB位置而指針仍無(wú)反應(yīng)時(shí)，可按反時(shí)針?lè)较蜣D(zhuǎn)動(dòng)透明輸出旋鈕，待指針有適當(dāng)偏轉(zhuǎn)時(shí)，即可讀數(shù)。例如透明輸出旋鈕兩條紅線間指50dB，指針指向-ldB，則被測(cè)聲壓級(jí)為50+（-1）=49dB。松江區(qū)高速公路噪聲檢測(cè)公司</p><p style="text-indent:25px">上海綠環(huán)商品檢測(cè)有限公司致力于儀器儀表，是一家服務(wù)型的公司。上海綠環(huán)商品檢測(cè)致力于為客戶提供良好的環(huán)境監(jiān)測(cè)，公共場(chǎng)所衛(wèi)生檢測(cè)，建設(shè)工程衛(wèi)生學(xué)評(píng)價(jià)，室內(nèi)空氣檢測(cè)，一切以用戶需求為中心，深受廣大客戶的歡迎。公司從事儀器儀表多年，有著創(chuàng)新的設(shè)計(jì)、強(qiáng)大的技術(shù)，還有一批**的專業(yè)化的隊(duì)伍，確保為客戶提供良好的產(chǎn)品及服務(wù)。上海綠環(huán)商品檢測(cè)秉承“客戶為尊、服務(wù)為榮、創(chuàng)意為先、技術(shù)為實(shí)”的經(jīng)營(yíng)理念，全力打造公司的重點(diǎn)競(jìng)爭(zhēng)力。</p></p><br /><p>文章來(lái)源地址: 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