noise rating 中文意思是什麼
noise rating
解釋
噪聲定額-
Determination of rating levels from measurement data - part 1 : noise immission in the neighbourhood
從測量數據中算出額定聲級.鄰近區域發出的噪聲 -
Then analytical measurements of the noise were carried out on both of the turbines by means of modern acoustic apparatus and a conclusion has been found that the noise of the concentrated wind energy turbine is lower than the one of the ordinary wind energy turbine and the root of the trouble to cause noise chiefly originates from the turbine blade. besides, the result of analytical measurement also reveals that the power output both of the wind energy turbines will increase with the increase of the wind speed and unfortunately does the noise too. in order to lower the noise, a measures of noise reduction have been advanced that an active method is to develop a wind energy turbine run at a lower rating of wind speed while the passive method is to adopt a board drilled tiny holes, having established a sound technological basis for the development of a kind of wind energy turbine of low noise and high level in the world
主要對濃縮風能型風力發電機在正常運轉時，噪聲產生的機理進行了理論分析研究，並與普通型風力發電機的噪聲進行了對比實驗分析；利用現代聲學測試手段對兩類機型進行測試與分析，得出濃縮風能型風力發電機產生噪聲低於普通型風力發電機和葉輪是風力發電機產生噪聲的主要部件的結論；通過對兩類機型的噪聲、輸出功率的測試，得出隨著風速的增加，兩類風力發電機的輸出功率在增加，產生的噪聲也在增加的結論；提出了進一步降低濃縮風能型風力發電機噪聲的措施，從主動降噪方面，研製低額定轉速的發電機；從被動降噪方面，採用微孔穿板的降噪結構；為研究開發一種國際上低噪聲、高水平的風力發電機打下了良好的技術基礎。 -
Measurement and assessment of aircraft noise ; determination of rating level of aircraft noise exposure
飛機噪聲的測量和評定.飛機發射噪聲等級的測定 -
When the cooling fan is adopted, the forced air circulation of the low - noise fan will reduce the operating temperature of the winding so as to increase the output capacity up to 150 % of the rating capacity
當採用風冷系統時，低噪聲風機通過強迫空氣循環，可降低線圈的運行溫度，即可增大容量輸出至額定的150 %左右。 -
Method for rating industrial noise affecting mixed residential and industrial areas
評定工業噪聲對住宅和工業混合地區的影響的定方法 -
Two copies of the engine emission control certificate and engine noise certificate or approval letters from the environmental protection department, if the engine is a new model or of a new engine rating
4 . 2 . 2 . 5 .引擎如屬新型號或新的引擎功率，則須提交由環境保護署發出的引擎排放管制及格證明書和引擎噪音及格證明書或批準信的副本兩份。 -
Two ( 2 ) copies of the engine emission control certificate and engine noise certificate or approval letters from the environmental protection department, if the engine is a new model or of a new engine rating. original certificate or approval letter will be required for checking at the time of the type approval examination
引擎如屬新型號或新的引擎功率，則須提交由環境保護署發出的引擎排放管制及格證明書和引擎噪音及格證明書或批準信的副本兩份。在接受類型評定檢驗時，則須出示證明書或批準信的正本，以供核對。 -
Two copies of the engine emission control certificate and engine noise certificate or approval letters from the environmental protection department, if the engine is a new model or of a new engine rating. original certificate or approval letter will be required for checking at the time of the type approval examination
引擎如屬新型號或新的引擎功率，則須提交由環境保護署發出的引擎排放管制及格證明書和引擎噪音及格證明書或批準信的副本兩份。在接受類型評定檢驗時，則須出示證明書或批準信的正本，以供核對。 -
Determination of rating levels from measurements - part 2 : noise immissions at the work place
測量評定聲級.第2部分:工作場所噪聲發散
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