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class="pic"><img src="https://tyunfile.71360.com/UploadFile/SHLHJC1/637449324718045812/3185742.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div><div id="239vhy3" class="smallimg"><div><p class="pic"><img src="https://tyunfile.71360.com/UploadFile/SHLHJC1/637449324718045812/3185742.png" class="vcenter" onerror="javascript:this.src='/static/new_net_01/images/nopic.jpg';"></p></div></div></div><div id="3iuazqp" 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>嘉定區(qū)工業(yè)噪聲檢測(cè)服務(wù)公司,噪聲檢測(cè)</p><p><span>***更新：</span>2021-01-28 03:16:36</p><p><span id="click" >瀏覽次數(shù)：1次</span></p><a rel="nofollow" class="button">聯(lián)系我們</a></div></div><div id="hqhxjl2" 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="k8lcov9" class="page-proshow02"><p class="title">詳細(xì)說(shuō)明</p><div id="uyac3so" 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)，嘉定區(qū)工業(yè)噪聲檢測(cè)服務(wù)公司，區(qū)域環(huán)境噪聲和道路交通噪聲實(shí)現(xiàn)自動(dòng)采樣，嘉定區(qū)工業(yè)噪聲檢測(cè)服務(wù)公司，嘉定區(qū)工業(yè)噪聲檢測(cè)服務(wù)公司，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)。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)。周期性變化噪聲用快擋讀取較大值并讀取隨時(shí)間變化的噪聲值，也可以測(cè)量等效聲級(jí)。嘉定區(qū)工業(yè)噪聲檢測(cè)服務(wù)公司</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="嘉定區(qū)工業(yè)噪聲檢測(cè)服務(wù)公司,噪聲檢測(cè)" src="https://tyunfile.71360.com/UploadFile/SHLHJC1/637449324718045812/3185742.png"></div><p style="text-indent:25px">加強(qiáng)噪聲檢測(cè)工作的對(duì)策：提高重視程度當(dāng)前我國(guó)對(duì)環(huán)境保護(hù)工作非常重視，也采取了很多積極措施，取得了明顯成效，但是在噪聲檢測(cè)工作上還顯得比較滯后，需要進(jìn)一步加強(qiáng)。對(duì)檢測(cè)站而言，面臨著沉重的噪聲檢測(cè)工作任務(wù)，由于主觀意識(shí)較為薄弱，因此在很大程度上未認(rèn)識(shí)到噪聲檢測(cè)的重要性，主要放在水環(huán)境、大氣環(huán)境等檢測(cè)上。對(duì)此在今后的工作中，需要提高對(duì)噪聲檢測(cè)的重視程度，必須較全、多角度加強(qiáng)控制，從噪聲污染特征出發(fā)，將環(huán)境噪聲檢測(cè)與實(shí)際情況結(jié)合起來(lái)，保證噪聲檢測(cè)結(jié)果的正確性與科學(xué)性。徐匯區(qū)低頻噪聲檢測(cè)機(jī)構(gòu)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。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="嘉定區(qū)工業(yè)噪聲檢測(cè)服務(wù)公司,噪聲檢測(cè)" src="https://tyunfile.71360.com/UploadFile/SHLHJC1/637449324825272384/4274578.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。</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，它聽起來(lái)的感覺像是綿延不絕的“嘶嘶”聲，類似電視沒信號(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。測(cè)量時(shí)要避免高溫、高濕、強(qiáng)磁場(chǎng)、地面和墻面反射等因素的影響。</p><div style="width:100%;text-align: center;"><img style="max-width: 640px; max-height: 320px;" alt="嘉定區(qū)工業(yè)噪聲檢測(cè)服務(wù)公司,噪聲檢測(cè)" src="https://tyunfile.71360.com/UploadFile/SHLHJC1/637449324982909083/9123692.png"></div><p style="text-indent:25px">聲強(qiáng)測(cè)量法：當(dāng)聲強(qiáng)探頭在聲源附近移動(dòng)時(shí)，聲波入射角與傳聲器膜片外法向方向?yàn)?0°時(shí)具有較小的方向靈敏度，輸出聲強(qiáng)為0。當(dāng)聲強(qiáng)探頭改變位置并使其夾角小于或大于90°時(shí)，聲強(qiáng)探頭輸出正或負(fù)聲強(qiáng)，且隨夾角增加在0～180°范圍內(nèi)聲強(qiáng)較全值增加。因此，用聲強(qiáng)測(cè)量法能區(qū)分出聲波入射的方向，從而找出噪聲聲源，并可測(cè)量可能聲源的位置。聲強(qiáng)測(cè)量法不需要特殊的聲學(xué)環(huán)境，適宜作現(xiàn)場(chǎng)測(cè)量。由于聲強(qiáng)是矢量，不僅能反映噪聲的大小還表示噪聲的輻射方向，因此測(cè)量汽車或發(fā)動(dòng)機(jī)表面聲強(qiáng)分布就可以知道聲音的輻射情況。但聲強(qiáng)測(cè)量的測(cè)試效率較低，一方面為準(zhǔn)確確定噪聲源不得不選擇適當(dāng)?shù)臏y(cè)點(diǎn)和側(cè)面，進(jìn)行細(xì)致的、多方面的聲強(qiáng)分布研究；而另一方面噪聲大時(shí)多對(duì)應(yīng)于發(fā)動(dòng)機(jī)滿負(fù)荷工作狀態(tài)，由于降溫和通風(fēng)設(shè)施欠缺不允許被試發(fā)動(dòng)機(jī)長(zhǎng)時(shí)間工作于滿負(fù)荷下，而反復(fù)啟動(dòng)一則效率低，二則工況難以一致，給測(cè)量帶來(lái)了許多不便，甚至使試驗(yàn)無(wú)法進(jìn)行。當(dāng)所測(cè)噪聲高出背景不足3dB時(shí)，測(cè)量結(jié)果不能作為任何依據(jù)。普陀區(qū)住宅噪聲檢測(cè)收費(fèi)</p><p style="text-indent:25px">測(cè)量等效聲級(jí)時(shí)，使用積分聲級(jí)計(jì)。嘉定區(qū)工業(yè)噪聲檢測(cè)服務(wù)公司</p><p style="text-indent:25px">噪聲對(duì)視力的損害。人們只知道噪聲影響聽力，其實(shí)噪聲還影響視力。試驗(yàn)表明：當(dāng)噪聲強(qiáng)度達(dá)到90分貝時(shí)，人的視覺細(xì)胞敏感性下降，識(shí)別弱光反應(yīng)時(shí)間延長(zhǎng)；噪聲達(dá)到95分貝時(shí)，有40％的人瞳孔放大，視模糊；而噪聲達(dá)到115 貝時(shí)，多數(shù)人的眼球?qū)饬炼鹊倪m應(yīng)都有不同程度的減弱。所以長(zhǎng)時(shí)間處于噪聲環(huán)境中的人很容易發(fā)生眼疲勞、眼痛、眼花和視物流淚等眼損傷現(xiàn)象。同時(shí)，噪聲還會(huì)使色覺、視野發(fā)生異常。調(diào)查發(fā)現(xiàn)噪聲對(duì)紅、藍(lán)、白三色視野縮小80％。噪聲對(duì)兒童身心健康危害更大。因兒童發(fā)育尚未成熟，各組織部位十分嬌嫩和脆弱，不論是體內(nèi)的胎兒還是剛出世的孩子，噪聲均可損傷聽覺部位，使聽力減退或喪失。據(jù)統(tǒng)計(jì)，當(dāng)今世界上有7000多萬(wàn)耳聾者，其中相當(dāng)部分是由噪聲所致。**研究已經(jīng)證明，家庭室內(nèi)噪音是造成兒童聾啞的主要原因，若在85分貝以上噪聲中生活，耳聾者可達(dá)5 ％。嘉定區(qū)工業(yè)噪聲檢測(cè)服務(wù)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。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。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)憑借創(chuàng)新的產(chǎn)品、專業(yè)的服務(wù)、眾多的成功案例積累起來(lái)的聲譽(yù)和口碑，讓企業(yè)發(fā)展再上新高。</p></p><br /><p>文章來(lái)源地址: http://www.cdcfah.com/cp/3042900.html</p></div></div></div></div></div><div id="xmtfhts" class="page-right twoColRt"><div id="3lhtkwf" class="box01 margin10 clearfix"><h3><a href="http://www.cdcfah.com/cp/">猜你喜歡</a></h3><div id="smykb2k" 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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