飛機聲測 的英文怎麼說
中文拼音 [fēijīshēngcè]
飛機聲測
英文
acoustic aircraft detection-
Measurement of noise airworthiness verification to the light propeller airplane
小型螺旋槳類飛機的適航噪聲驗證測量方法To sum up, tested and validated by data sets of shenzhou iv unmanned spacecraft and precise orbit ephemeris, the algorithms presented in the thesis can improve orbit accuracy and reduce random noise considerablely. derived conclusions have important value for reference, and lay the firm technological foundation for future applications
總之，經過神舟四號飛船實測數據計算和精密星歷檢驗，表明本文提出的各種定軌方法可以較好的提高定軌精度，減少隨機噪聲，所得出的結論對于實際應用具有重要的參考價值，並為將來的應用奠定了堅實的技術基礎。A minitype wireless noise measure system is designed to act as an automonitor, which has been proved to be a practical device
試驗結果表明，該系統可以有效獲得飛機的噪聲數據，測試結果與模擬結果比較吻合。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。In order to analyze the influence of airplane noise on indoor sound environment in the vicinity of beijing international airport, different of buildings, such as villages, schools, offices, commercial building are choose as monitoring objects, the characteristic of sound insulation for building around beijing international airport are monitored and analyzed
摘要為較好的分析飛機噪聲對機場周圍居民室內聲環境的影響，研究選擇不同類型的民居房、學校（多層建築） 、基層機關辦公用房、商品房等為測試對象，對北京國際機場周邊地區建築物隔聲特性（插入損失）進行監測與分析，結果表明：現有民居、學校、機關辦公室的隔聲特性較差，商品房的隔聲效果較好。In huangshan city, east china ' s anhui province, an aircraft was required to change route on thursday afternoon, as parents worried the noise could affect their children ' s listening comprehension in the english test
周四下午安徽省黃山市，一架飛機被迫改變航線，原因是考生家長擔心飛機噪聲有可能會影響英語考試中的聽力測試。Abstract : 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
文摘: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。Measurement of aircraft noise around airport
機場周圍飛機噪聲測量方法The monitoring and evaluation on the airplane noise in inner airfield
機場內部飛機噪聲監測與評價Measurement and assessment of aircraft noise ; quantities and parameters
飛機噪聲的測量和評定.數量值和參數The monitoring and evaluation on the noise pollution around a military airport
某軍用機場周圍飛機噪聲監測及評價D specification for frequency weighting for the measurement of aircraft noise d - weighting
飛機噪聲測量用頻率加權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A test method comparison on the brainstem auditory evoked potentials and the audiometry methods testing aircraft noise - induced hearing losses
飛機噪聲性聽力損傷的腦干聽覺誘發電位及電測聽方法比較At last, the test for the ma60 apu noise with the micro perforated absorber is present in this paper. experiment results show that an obvious reduction has be obtained using this micro perforated absorber
最終將微穿孔板消聲器安裝到新舟60飛機apu的排氣管道上在飛機場進行現場測試，得到了滿意的降噪結果。A compositive measure of these four signals will be introduced in this paper. first the feasibility of the compositive measure is analyzed. then compositive measure model is built on the basis of detectable functions of each signal
一是初步建立起飛機雷達信號、紅外信號、光學信號和聲學信號統一測度模型，首先分析統一測度的可行性，對相關專業知識進行研究，找出各個信號的測度公式，在此基礎上建立統一測度模型，並對模型做進一步討論及分析模型中存在的問題。Wavelets technology and wavelet packages technology for the ultrasonic testing signal of some aeroengine. turbine vane and some aeroplane main undercarriage wheel - hub axes are researched
本文研究了某型航空發動機壓氣機葉片和某型飛機主起落架輪轂軸套超聲檢測信號的小波分析和小波包分析技術。Measurement and assessment of aircraft noise ; aircraft noise monitoring systems within the meaning of article 19a of the luftverkehrsgesetz civil aviation law
飛機噪聲測量和評估.根據空中交通法規19a規定的飛行Acoustics - measurement of sound pressure levels in the interior of aircraft during flight iso 5129 : 2001
聲學.飛行中飛機內聲壓級的測量So, a kind of device is needed, which can be fixed on the airplanes and can provide the tractor drivers with the exact distance between the dangerous points and the barriers. furthermore, the device should alert the drivers with sounds and lights to minimize the possibility of these accidents and ensure the airplanes ’ safety
因此在飛機上安裝一種測量障礙物距離的裝置，讓司機坐在牽引車內就能獲得飛機危險點與障礙物之間的精確距離，並能通過聲、光等形式提醒司機，這樣就可以盡量減小車輛作業過程中的事故率，保障飛機的安全。分享友人