sound power and power level 中文意思是什麼

sound power and power level 解釋
聲功率與聲功率級
  • sound : adj 1 健全的；強壯的，正常的；完好的，無疵的，沒有腐爛的（船、牙齒等）。2 正確的；正當的，合法的...
  • power : n 1 力，力量；能力；體力，精力；（生理）機能；〈常 pl 〉才能。2 勢力，權力，權限；威力；政權；權...
  • and : n. 1. 附加條件。2. 〈常 pl. 〉附加細節。
  • level : n 1 水平儀，水準儀；水準測量。2 水平線，水平面；水平狀態；平面，平地。3 水平，水準；水位；標準；...
  1. Wind turbines - declaration of apparent sound power level and tonality values

    風輪機.表面聲功率級和音調值聲明
  2. Wind turbines - part 14 : declaration of apparent sound power level and tonality values

    風輪機.第14部分:表面聲功率級和音調值聲明
  3. Here a number of factors must be taken into consideration, such as the environmental standard of the area where the engine room is located, the fender structure of the engine room as well as the engine type, power level and the cooling air volume, etc. the core of the overall control is the concept of " equal sound insulation ", which means to apply a closed fender structure to isolate the engine unit from outside parts so as to cut the outward sound radiation

    經過多年來與環保部門的合作，對油機房進行消噪聲處理，積累了一些治理經驗，主要是必須根據具體的機房項目來確定相應的控制方案，這其中應考慮機房所在區域的環境標準，機房圍護結構形式及油機機型、功率、冷卻風量等因素。綜合控制的核心是等隔聲概念，即用一封閉的圍護結構將機組與外界隔離開來，減少聲源對外的聲輻射。
  4. Air conditioners, heat pumps and dehumidifiers with electrically driven compressors. measurement of airborne noise. determination of the sound power level

    帶電動壓縮機的空調器熱力泵和除濕器.機載噪音的測量.噪音等級的測定
  5. Air conditioners, heat pumps and dehumidifiers with electrically driven compressors - measurement of airborne noise - determination of the sound power level

    帶電驅動壓縮機的空調加熱泵和除濕器.空氣噪聲的測量.聲功率水平的測定
  6. Air conditioners, heat pumps and dehumidifiers with electrically driven compressors - measurement of airborne noise - determination of the sound power level ; german version env 12102 : 1996

    空調器熱力泵和帶電動壓縮機的除濕器.載氣噪聲測量
  7. Abstract : on the basis of the analysis about noise sources of the air compressor, it shows that air dynamic noise is primary one. according to the theory of fluid mechanics, the mathematics model of the air compreesor air dynamic noise is found, which shows the relationship between the sound power level and other parameters. the knowing noise of the air compressor " s air dynamic is of low frequencies. the reliable data is provided for the noise and vibration control

    文摘:通過對空壓機噪聲源的分析，確認空壓機噪聲源中的空氣動力性噪聲為最強；由流體流場的聲學理論，建立空壓機動力性噪聲源的力學模型，它表明聲功率與其它參數的關系；並知空壓機的空氣動力性噪聲呈低頻特性，這為噪聲及振動控制提供了可靠的依據
  8. Acoustics. noise emitted by machinery and equipment. determination of emission sound pressure levels at a work station and at other specified positions from the sound power level

    聲學.機械裝置及設備噪聲.工作地點和其它試驗場所按聲功率級測量聲壓級
  9. Acoustics - noise emitted by machinery and equipment - determination of emission sound pressure levels at a work station and at other specified positions from the sound power level

    聲學.機械裝置及設備發出的噪聲.在工作地點和其它試驗場所從聲功率級測量聲壓級
  10. 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。
  11. Limits of sound power level for noise emitted by air compressors for power source use and diaphragm compressors

    動力用空氣壓縮機和隔膜壓縮機噪聲聲功率級限值
  12. Sound power and power level

    聲功率與聲功率級
  13. Most present acoustic level gauges use a sound generator which can produce high - power acoustic waves and a microphone which can detect the echo signal. the fluid level can be worked out based on the artificial analysis of the echo curve

    目前正在應用的井下液位測量儀器，主要是通過爆炸聲源產生大功率聲脈沖信號，利用微音器接收回波信號，人為地對回波信號曲線進行分析來估算液位。
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