acoustic attenuation 中文意思是什麼
acoustic attenuation
解釋
聲衰減- acoustic : adj. 1. 聽覺的；聲學的。2. 助聽的；傳音的。3. 原聲的，不經過電子設備傳聲的。adv. -tically 在聽覺上；在聲學上。
- attenuation : n. 1. 變薄，變細。2. 減少，減弱。3. 稀釋。4. 【物理學】衰減。
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Test method for bulk acoustic wave attenuation of piezoelectric lithium niobate crystals
壓電鈮酸鋰單晶體聲波衰減測試方法 -
Express the factors resulting in the attenuation of acoustic waves
敘述引起音波衰減的因素。 -
The new characteristics of borehole compensated ability of two transmitters and two receivers acoustic log system were given under a pulse resource and no attenuation ideal beds by numerical simulation
摘要通過數值模擬計算給出了點聲源、無衰減各種理想地層條件下雙發雙收聲系在不同擴徑層段新的聲速測井響應特徵規律。 -
Numerical simulations were performed and results show that significant attenuation of radiated acoustic power can be obtained, and sound radiation cancellation performance becomes better in low and medium frequencies
進行了數值模擬，模擬結果表明，應用壓電片能有效地抑制聲吶設備中障板聲輻射，抑制中低頻的聲輻射效果更好。 -
Comparisons between the acoustic performances of the air cleaners with and without filter paper illustrated that the acoustic attenuation performance has been improved due to the existence of filter paper
通過比較不帶濾紙和帶有濾紙的空氣濾清器的聲學性能結果表明，濾紙的考慮與否對空濾器的中高頻消聲性能有很大影響。 -
Finite element calculation and analysis of acoustic attenuation performance of perforated tube silencers
穿孔管消聲器消聲性能的有限元計算及分析 -
Acoustic attenuation constant
聲衰減常數 -
From the point of kinematics and dynamics, the author analyses the propagation rules of stress waves in concrete, namely time - space relations, wave amplitude attenuation, dispersion effect and characteristics of transmission of reflected waves and acoustic waves. combining with engineering practices, the author also concluded the main points of low strain detection of integrity of longdiameter underwater cast - in - situ piles, and pointed out that comprehensive and relational utilization of reflected waves method and acoustic wave transmission method can accurately evaluated the integrity of pile shaft and then improve the reliability of detection. 6figs., 3refs
從運動學和動力學角度，分析應力波在混凝土中的傳播規律：時空關系、波幅衰減、頻散作用以及反射波與聲波透射的特點，結合工程實踐，總結大直徑水下灌注樁低應變檢測的工作要點，指出綜合、合理運用反射波法與聲波透射法，可以較準確地評價樁身完整性，提高檢測結果的可靠性.圖6 ，參3 -
The structural optimization based on noise attenuation is studied, in which the thickness of each link is taken as the design variable, and the weighting sum of structural mass and measure of the structural acoustic performance is taken as the synthesis performance index
選取機構桿件厚度為設計變量，以機構質量和聲輻射性能量度的加權和為目標函數，應用改進了的變尺度優化演算法對優化問題進行了求解。 -
Based on the conclusion of wave number analysis, a new dynamic equation taking the measure of structural acoustic performance is obtained by a set of transformation, which is much convenient for us to discuss the noise attenuation
並依此對機構動態方程進行了改造，得出了一個以機構聲輻射性能的量度為變量的新的動態方程，為後面機構聲輻射控制研究提供了方便。
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