聲源級 的英文怎麼說

中文拼音 [shēngyuánjí]
聲源級 英文
acoustic source level
  • 源 : 名詞1. （水流起頭的地方） source （of a river）; fountainhead 2. （來源） source; cause 3. （姓氏） a surname
  • 級 : Ⅰ名詞1 （等級） level; rank; grade 2 （年級） any of the yearly divisions of a school course; gra...
  1. Verification regulation of standard ultrasonic sources for milliwatt level

    毫瓦級標準超聲源檢定規程
  2. Ultrasonic sources at milliwatt levels

    毫瓦級超聲源
  3. Acoustics - determination of sound power levels of noise soures - engineering methods for small, movable sources in reverberant field - part 1 : comparsion method for hard - walled test rooms

    聲學聲壓法測定噪聲源聲功率級混響場中小型可移動聲源工程法第1部分:硬壁測試室比較法
  4. Acoustics - determination of sound power levels of noise sources - engineering methods for small, movable sources in reverberant fields - methods for special reverberation test rooms

    聲學.噪聲源的聲功率級測定.在混響場中對可移動聲源的工程測量方法.用專用混響試驗室的測量方法
  5. Acoustics - determination of sound power levels of noise sources - engineering methods for small, movable sources in reverberant fields - comparison for hard - walled test rooms

    聲學.噪聲源聲功率級的測定.在混響聲場中小聲源和移動聲源的工程測量方法.第1部分:硬墻試驗室的比較分析法
  6. Acoustics - determination of sound power levels of noise sources - engineering methods for small, movable sources in reverberant fields - part 1 : comparison method for hard - walled test rooms

    聲學.測定噪聲源的聲功率級.混響場內小型可移動聲源的工程法.第1部分:硬壁試驗室中的比較法
  7. Acoustics - determination of sound power levels of noise sources - engineering methods for small, movable sources in reverberant fields - part 2 : methods for special reverberation test rooms

    聲學.聲壓法測定噪聲源聲功率級.混響聲場中小型可移動聲源的工程檢測法.第2部分:專用混響試驗室法
  8. Acoustics. determination of sound power levels of noise sources. engineering methods for small, movable sources in reverberant fields. part 1 : comparison method for hard - walled test rooms

    聲學.噪聲源聲強級的測定.混響聲場中小聲源和移動聲源的工程測量方法.第1部分:硬墻試驗室的比較分析法
  9. Acoustics - determination of sound power levels of noise sources - using sound pressure - engineering metheds for small, movable sources in reverberant fields - part 2 : methods for special reverberation test rooms

    聲學聲壓法測定噪聲源聲功率級混響場中小型可移動聲源工程法第2部分:專用混響測試室法
  10. Acoustics - determination of sound power levels of noise sources - precision methods for anechoic and semi - anechoic rooms

    聲學噪聲源聲功率級的測定消聲室和半消聲室精密法
  11. Precision methods for the determination of sound power levels of noise sources in anechoic and hemi - anechoic rooms

    在無回聲和半無回聲的室內精確測定噪聲源聲功率級的方法
  12. Acoustics - determination of sound power levels of noise sources using sound pressure - precision methods for anechoic and hemi - anechoic rooms

    聲學.利用聲壓測定噪聲源聲功率級.消聲室和半消聲室用精密法
  13. Acoustics - determination of sound power levels of noise sources using sound pressure - precision methods for anechoic and hemi - anechoic rooms iso 3745 : 2003 ; german version en iso 3745 : 2003

    聲學.利用聲壓測定噪聲源的聲功率級.消聲室和半消聲
  14. A large planar microphone array, which consists of 111 microphones, was successfully applied to obtain a two - dimensional mapping of the sound sources on a landing aircraft. the focus of study in this paper is on the landing gear noise source. the spectra, directivities and sound pressure levels of flap side - edge noise of 7 narrow - board commercial aircraft and 7 wide - board commercial aircraft are presented. it is found that the landing gear noise spectrum is broadband with some single tones in some cases. the directivity of the total sound pressure level of a landing gear noise resembles that of a horizontal dipole. the level differences between the various aircraft landing gears are larger than those expected from the airspeed differences. it is thus expected that the louder noise emission of the landing gears can be reduced by redesigning

    應用由111個傳聲器組成的平面傳聲器陣列對當前流行的民用客機進場著陸過程中的機體噪聲源進行了實驗測量，本文對七架窄體客機和七架寬體客機的起落架噪聲進行了分析，得到了起落架噪聲的頻譜特性、指向特性和聲級變化.研究發現，起落架噪聲的頻譜是由寬頻隨機噪聲與一些較為明顯的單音噪聲源組成，起落架噪聲的指向性類似於一個水平放置的偶極子.不同飛機起落架噪聲的聲級相差較大，這說明可以通過重新結構設計降低起落架噪聲。
  15. Acoustics - determination of sound power levels of noise sources using sound intensity - measurement at discrete points

    聲學.利用聲音強度測定噪聲源功率級.第1部分:離散點測量
  16. En iso 9614 - 2 acoustics. determination of sound power levels of noise sources using sound intensity. part 2 : measurement by scanning

    聲學.利用聲音強度測定噪聲源功率級.第2部分:掃描測量法
  17. Acoustics - determination of sound power levels of noise sources using sound intensity - part 2 : measurement by scanning iso 9614 - 2 : 1996 ; german version en iso 9614 - 2 : 1996

    聲學.利用聲音強度測定噪聲源功率級.第2部分:掃描測
  18. Acoustics - determination of sound power levels of noise sources using vibration velocity - measurement for seal machinery

    聲學振速法測定噪聲源聲功率級用於封閉機器的測量
  19. In this paper the train running noise level has been predicted with the theory of point sound source. the sound exposure level of a train set pass, equivalent continuous sound level and maximum sound level of a train set pass has been taken as estimate values, and some kinds of affixation attenuation on the course of noise propagation is considered, then the corresponding visual software has been developed. these make it convenient and precise to predict the noise level

    本文從點聲源的理論出發，對列車運行噪聲進行預測計算，採用一列車通過時的單發暴露聲級、時間特性的最大聲壓級和一定時間內的等效聲級等作為噪聲評價量，並考慮了噪聲傳播過程中的各種附加衰減，編制了相應的可視化軟體，使噪聲預測計算方便、準確。
  20. The propagation characteristics of underwater acoustic channels and their influences on long - range information transmission are studied thoroughly. based on the sonar equation, the optimal frequency band is abtained. from the calculation about transmission loss, the source level is forecasted. based on the random time varying channel theory, the fading characteristics of long - range underwater acoustic channels are analyzed

    系統、深入地研究了水聲通道特性及其對水聲遠程信息傳輸系統的影響；從聲納方程出發，確定了系統的最佳工作頻段；在聲傳播損失計算的基礎上，給出了聲源級的預報；基於時變通道理論，描述了遠程水聲通道的衰落特性。
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