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src="https://tyunfile.71360.com/UploadFile/SHLHJC1/637449324936239188/536607.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="b75dv5x" 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>青浦區(qū)社會(huì)生活環(huán)境噪聲檢測(cè)服務(wù)機(jī)構(gòu),噪聲檢測(cè)</p><p><span>***更新：</span>2021-01-18 04:17:22</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="b5xrntn" 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="pl5jft7" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="5j3lp3b" class="box"><p><p style="text-indent:25px">中國(guó)環(huán)境噪聲監(jiān)測(cè)工作目標(biāo)：我國(guó)環(huán)境監(jiān)測(cè)工作目標(biāo)是較終實(shí)現(xiàn)自動(dòng)連續(xù)監(jiān)測(cè)。到2010年，各機(jī)場(chǎng)航空噪聲、城市火車站鐵路噪聲和所有城市功能區(qū)噪聲全部實(shí)現(xiàn)自動(dòng)連續(xù)監(jiān)測(cè)，區(qū)域環(huán)境噪聲和道路交通噪聲實(shí)現(xiàn)自動(dòng)采樣，青浦區(qū)社會(huì)生活環(huán)境噪聲檢測(cè)服務(wù)機(jī)構(gòu)，數(shù)據(jù)處理實(shí)現(xiàn)計(jì)算機(jī)化。中國(guó)環(huán)境噪聲監(jiān)測(cè)技術(shù)路線運(yùn)用具有自動(dòng)采樣功能的環(huán)境噪聲自動(dòng)監(jiān)測(cè)儀、積分聲級(jí)計(jì)、噪聲數(shù)據(jù)采集器設(shè)備，按網(wǎng)格布點(diǎn)法進(jìn)行區(qū)域環(huán)境噪聲監(jiān)測(cè)，按路段布點(diǎn)法進(jìn)行道路交通噪聲監(jiān)測(cè)，按分期定點(diǎn)連續(xù)監(jiān)測(cè)法進(jìn)行功能區(qū)噪聲監(jiān)測(cè)。在大型國(guó)際空港航空噪聲自動(dòng)監(jiān)測(cè)系統(tǒng)，在穿越大型城市的鐵路樞紐站、場(chǎng)建立鐵路噪聲自動(dòng)監(jiān)測(cè)系統(tǒng)，青浦區(qū)社會(huì)生活環(huán)境噪聲檢測(cè)服務(wù)機(jī)構(gòu)，青浦區(qū)社會(huì)生活環(huán)境噪聲檢測(cè)服務(wù)機(jī)構(gòu)。在全國(guó)建成功能完善的城市環(huán)境噪聲監(jiān)測(cè)網(wǎng)絡(luò)和重點(diǎn)交通噪聲源自動(dòng)監(jiān)測(cè)網(wǎng)絡(luò)系統(tǒng)。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。青浦區(qū)社會(huì)生活環(huán)境噪聲檢測(cè)服務(wù)機(jī)構(gòu)</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="青浦區(qū)社會(huì)生活環(huán)境噪聲檢測(cè)服務(wù)機(jī)構(gòu),噪聲檢測(cè)" src="https://tyunfile.71360.com/UploadFile/SHLHJC1/637449324936239188/536607.png"></div><p style="text-indent:25px">高鐵站沿線噪聲檢測(cè)與預(yù)測(cè)研究設(shè)計(jì)中遇到的問(wèn)題：隨著我國(guó)高速鐵路的飛速發(fā)展，噪聲污染已成為較大的環(huán)境污染因素之一，其特點(diǎn)主要有噪聲高、持續(xù)時(shí)間短等。高鐵新城的建設(shè)也在如火如荼的進(jìn)行，高鐵站周邊建設(shè)大量的住宅、酒店、辦公等民用建筑，高鐵站周邊的噪聲環(huán)境影響了建筑設(shè)計(jì)策略，有針對(duì)性的隔聲措施決定了建筑建成后的室內(nèi)環(huán)境品質(zhì)。因此在鐵路沿線進(jìn)行建筑項(xiàng)目建設(shè)前，設(shè)計(jì)需充分考慮選址的特殊情況，采取措施降低室外交通噪聲對(duì)室內(nèi)背景噪聲的影響。高鐵一般采用高架方式建設(shè)，其聲場(chǎng)與一般地面鋪設(shè)鐵路有較大不同。中國(guó)尚無(wú)專門針對(duì)高鐵環(huán)境的噪聲標(biāo)準(zhǔn)，高鐵站沿線的噪聲分布數(shù)據(jù)也無(wú)參考。青浦區(qū)社會(huì)生活環(huán)境噪聲檢測(cè)服務(wù)機(jī)構(gòu)檢測(cè)人員將檢測(cè)數(shù)據(jù)及相關(guān)信息記錄在冊(cè)作為原始數(shù)據(jù)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="青浦區(qū)社會(huì)生活環(huán)境噪聲檢測(cè)服務(wù)機(jī)構(gòu),噪聲檢測(cè)" src="https://tyunfile.71360.com/UploadFile/SHLHJC1/637449325044862253/7947881.png"></div><p style="text-indent:25px">噪聲檢測(cè)要求：1、測(cè)量?jī)x器：測(cè)量?jī)x器精度為II型及II型以上的積分平均聲級(jí)計(jì)或環(huán)境噪聲自動(dòng)監(jiān)測(cè)儀器，其性能需符合《聲級(jí)計(jì)的電、聲性能及測(cè)試方法》(GB 3785—83) 和《積分平均聲級(jí)計(jì)》(GB/T17181—1997)的規(guī)定，并定期校驗(yàn)。測(cè)量前后使用聲校準(zhǔn)器校準(zhǔn)測(cè)量?jī)x器的示值偏差不得大于0.5dB，否則測(cè)量無(wú)效。聲校準(zhǔn)器應(yīng)滿足《聲校準(zhǔn)器》(GB/T15173—94)對(duì)1級(jí)或2級(jí)聲校準(zhǔn)器的要求，測(cè)量時(shí)傳聲器應(yīng)加防風(fēng)罩。2、測(cè)點(diǎn)選擇：根據(jù)監(jiān)測(cè)對(duì)象和目的，可選擇以下3種測(cè)點(diǎn)條件(指?jìng)髀暺魉梦恢?進(jìn)行環(huán)境噪聲的測(cè)量：（1）一般戶外：距離任何反射物(地面除外)至少3.5m外測(cè)量,距地面高度1.2m以上，必要時(shí)可置于高層建筑上，以擴(kuò)大監(jiān)測(cè)受聲范圍。使用監(jiān)測(cè)車輛測(cè)量，傳聲器應(yīng)固定在車頂部1.2m高度處。（2）噪聲敏感建筑物戶外：在噪聲敏感建筑物外，距墻壁或窗戶1m處，距地面高度1.2m以上。（3）噪聲敏感建筑物室內(nèi)：距離墻面和其他反射面至少1m。距窗約1.5m處，距地面1.2~1.5m高。</p><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。所有測(cè)量?jī)x器均應(yīng)符合相應(yīng)標(biāo)準(zhǔn)，使用前必須校準(zhǔn)。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="青浦區(qū)社會(huì)生活環(huán)境噪聲檢測(cè)服務(wù)機(jī)構(gòu),噪聲檢測(cè)" src="https://tyunfile.71360.com/UploadFile/SHLHJC1/637449324969940385/755914.png"></div><p style="text-indent:25px">環(huán)境噪聲測(cè)量注意事項(xiàng)有哪些：1.測(cè)量地點(diǎn)和位置的選擇是測(cè)量成敗的主要因素。進(jìn)行環(huán)境噪聲測(cè)量時(shí)，測(cè)點(diǎn)的選擇必須嚴(yán)格按照與測(cè)量目的完全對(duì)應(yīng)的有關(guān)標(biāo)準(zhǔn)的要求進(jìn)行。同時(shí)需注意，建筑物外部噪聲測(cè)量時(shí)盡可能離開(kāi)大型反射面3.5m以上，使反射聲的影響減至較低程度；建筑物內(nèi)部噪聲測(cè)量時(shí)，測(cè)點(diǎn)至少應(yīng)距離墻面或其他反射面1m，離窗1.5m，距離地面1.2—1.5m，并應(yīng)充分考慮門窗的側(cè)向聲傳遞、機(jī)器對(duì)聲音的遮擋與散射作用等要素對(duì)測(cè)量結(jié)果產(chǎn)生的影響。2.按照相應(yīng)標(biāo)準(zhǔn)的要求處理和提取測(cè)量數(shù)據(jù)，包括參數(shù)的類別、數(shù)據(jù)的數(shù)量等。3.測(cè)量時(shí)注意測(cè)試環(huán)境條件對(duì)測(cè)量可能造成的影響，其中包括大氣壓強(qiáng)、大氣溫度、濕度等。加工完成后要認(rèn)真清洗齒輪棱面的毛刺并防止磕碰傷。崇明區(qū)工業(yè)噪聲檢測(cè)價(jià)格</p><p style="text-indent:25px">在實(shí)踐中不斷作出修改與調(diào)整，保證其適用性與先進(jìn)性。青浦區(qū)社會(huì)生活環(huán)境噪聲檢測(cè)服務(wù)機(jī)構(gòu)</p><p style="text-indent:25px">白噪聲：表現(xiàn)：白噪音是一種全頻域的隨機(jī)噪音，它聽(tīng)起來(lái)的感覺(jué)像是綿延不絕的“嘶嘶”聲，類似電視沒(méi)信號(hào)播放雪花時(shí)的聲音。產(chǎn)生原因：白噪音通常是由設(shè)備中的增益裝置或功放產(chǎn)生的，如果將音量調(diào)節(jié)的過(guò)高，就很容易產(chǎn)生明顯的底噪。解決辦法：這時(shí)候需要檢查一下聲卡、軟件和音箱的輸出音量，以保證每個(gè)環(huán)節(jié)都沒(méi)有產(chǎn)生過(guò)載情況。PS：高靈敏度的麥克風(fēng)，如電容麥，能夠拾取到房間環(huán)境中人耳幾乎聽(tīng)不到的噪音，比如空調(diào)、屋外噪聲、風(fēng)聲等。表現(xiàn)：數(shù)字失真往往會(huì)發(fā)出刺耳的“嗡嗡”聲，聽(tīng)起來(lái)著實(shí)不像自然界中的聲音。一般來(lái)說(shuō)，它會(huì)根據(jù)電腦所用的進(jìn)程而不同。比如在使用不同的軟件或效果器時(shí)，數(shù)字失真也會(huì)隨之改變。產(chǎn)生原因：數(shù)字失真一般是由聲卡的某些問(wèn)題，或音箱與電腦連接在同一個(gè)插座上導(dǎo)致的。解決辦法：保證音箱或其他放音設(shè)備的電源與電腦等其他數(shù)字設(shè)備連接在自立的電源插座上。青浦區(qū)社會(huì)生活環(huán)境噪聲檢測(cè)服務(wù)機(jī)構(gòu)</p><p style="text-indent:25px">上海綠環(huán)商品檢測(cè)有限公司位于綏德路2弄8號(hào)第四層。公司自成立以來(lái)，以質(zhì)量為發(fā)展，讓匠心彌散在每個(gè)細(xì)節(jié)，公司旗下環(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)深受客戶的喜愛(ài)。公司秉持誠(chéng)信為本的經(jīng)營(yíng)理念，在儀器儀表深耕多年，以技術(shù)為先導(dǎo)，以自主產(chǎn)品為重點(diǎn)，發(fā)揮人才優(yōu)勢(shì)，打造儀器儀表良好品牌。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: http://www.cdcfah.com/cp/2895876.html</p></div></div></div></div></div><div id="fhlrvjp" class="page-right twoColRt"><div id="5n5rh3h" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="7f575rp" 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" 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