sound-pressure level 中文意思是什麼
sound-pressure level
解釋
聲壓級-
Methods of a - weighted sound pressure level measurement for pumps
泵用加權噪聲壓強的測量方法 -
Mechanical presses - methods of measurement of a - weighted sound pressure level
機械壓力機. a -加權聲壓級測量方法 -
Fans, blowers and compressors - determination of a - weighted sound pressure level
風扇鼓風機和壓縮機.加權噪聲壓強的測定 -
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。 -
( 4 ) establish the grey model on the basis of the actual sound pressure level of 27000dwt bulk carrier superstructure cabin as a sample and extend the grey model through comparing the prediction values with the actual values, aiming to predict the noise level of superstructure cabin of 74500dwt bulk carrier and 5618teu container ship
（ 4 ）以27000噸散裝貨船上層建築艙室噪聲的實際測量值為樣本，建立灰色預測模型，通過預測值和實測值的對比分析對模型進行推廣，並分別對74500噸散裝貨船和5618箱集裝箱船的上層建築艙室噪聲進行預測。 -
On the basis of this method, this dissertation makes further analysis on the sound reflection in spherical conformation. this dissertation also makes accurate conclusion of the sound focusing region, and the increment of sound pressure level in this region
而本文是在這一方法的基礎上對球形構造聲反射做更進一步的分析，對其形成的聲聚焦區域及區域內的聲壓級的增量得到量化的結果。 -
The purpose of this thesis lies in : ascertain the sound focusing region in spherical conformation accurately, the increment of sound pressure level in this region approximately, make a basic principle and method to avoid creating the sound focus for architect and designer of indoor ornament. therefore it solves reasonably the conflict of spherical conformation between architectural appearance and acoustics design
本文選題的意義在於：將球形構造產生的聲聚焦區域量化，聲聚焦區域內的聲壓級增量量化，為建築師，裝飾工程設計者在殼形構造的設計與室內裝飾過程中，提出避免產生聲聚焦的基本設計原則與方法，從而合理解決球形構造在建築造型與聲學設計間的矛盾。 -
The refinements made to the original methodology are based upon not only the abroad new research about noise evaluation, but also upon the thought of the domestic base of current noise evaluation. the procedure involves not only considering the noise sound pressure level, but also considering the speech interference level and noise spectrum balance problems, which offer enough information about building noise environment for engineer and owner
該評價方法借鑒了國外在噪聲評價方面最新的研究成果，同時也考慮了國內目前的噪聲評價狀況，該方法不僅僅考慮了噪聲聲壓級一個因素，同時還考慮了語言干擾級，以及噪聲頻譜的平衡性等問題，給工程人員以及建築業主提供了建築聲環境方面充足的信息，這是很有意義的。 -
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。 -
Sound system equipment - headphones and earphones associated with portable audio equipment - maximum sound pressure level measurement methodology and limit considerations - general method for " one package equipment
音響系統設備.與便攜聲學設備相連的耳機和頭戴送受話器.最大聲壓水平測量方法學和限制.成套設備通用方法 -
Among the 11 tested samples of battery - operated toy lanterns, four were musical. the government laboratory confirmed that these samples of battery - operated toy lanterns, which had sound - producing features, were found to have complied with the requirement of the peak emission sound pressure level prescribed in the current european standard for toys that emit continuous sound
政府化驗所的報告還指出，在11款玩具電燈籠樣本中， 4款是可發聲的，而這些發聲玩具電燈籠樣本均符合歐洲安全標準中發聲玩具的音量標準。 -
Saturated sound pressure level
飽和聲壓級 -
Sound pressure level
聲壓級水平 -
Maximum sound pressure level of microphone
傳聲器最高聲壓級 -
Measurement of sound pressure level for sound signal appliances by seagoing vessel
海船聲號器具的聲壓級測量 -
Sound pressure level, spl
的聲壓級 -
Procedures for outdoor measurement of sound pressure level
室外測量聲壓級的程序 -
Metal - cutting machine tools - measurement method of sound pressure level
金屬切削機床噪聲聲壓級測量方法 -
I achieve approximately the increment of sound level in sound focusing region relative to sound incidence ( ? lpc ), and make ascertain the sound pressure level in focusing region accurately. through draw the curve of wrap - up line equation with matlab program of computer software
文章最後總結出本文理論分析所得的幾個解析式和避免聲聚焦的設計原則，同時在理論和實驗上提出今後研究其它構造時的一些方法和方向。 -
Motion - picture sound reproduction, frequency response of sound pressure level ; measurement
影片的聲音重放.聲壓級的頻率響應.測量
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