acoustic medium 中文意思是什麼
acoustic medium
解釋
傳聲媒質-
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。 -
For medium or long distance underwater acoustic communication, the narrow bandwidth and low carrier frequency only supports low bit - rate signal transmission
對于中、遠距離的水聲通信而言，水聲通道的窄帶寬、低載波頻率特性只能支持較低的信息傳輸速率。 -
Since sound is the only effective information carrier for medium or long distance wireless communication in sea water, underwater acoustic ( uwa ) communication plays an important role in national defense and in the development of marine economy
由於聲波是目前海中實現中、遠距離無線通信唯一有效的信息載體，因此水聲通信對于國防的保障和海洋經濟的發展都有著極其深遠的意義。 -
A medium frequency - small size vector hydrophone of co - vibrating type is wrapped with low density compound material and in shuck only one piezoelectric ceramic accelerator is used for each channel to measure the vector components of the underwater acoustic field
摘要中頻小型同振式矢量水聽器採用低密度復合材料作為矢量通道外殼、壓電加速度計作為內部振動傳感器，以拾取水下聲場中的矢量信息。 -
Acoustic transmission medium
傳聲介質 -
The study instructs simulating valve leakage experiment, perfects valves leakage test technology and bases theoretically for applying valve leakage test in practice. the test stand is constructed and instrumented to accept a variety of valves in order to determine which characteristics of acoustic emission change with leakage rate. the data for each valve type is generated by varying valve type and working medium
建立模擬在用承壓閥門內漏實驗臺，研究典型閥門內漏聲源的聲學特性，確定聲發射特徵參量與泄漏率的關系，為定量評價閥門泄漏率提供實驗數據；通過對不同類型、不同規格、不同工作介質下的典型承壓閥門內漏的實驗研究，確定閥門內漏最佳檢測區域，建立在用承壓閥門內漏聲學檢測方法。 -
The characteristic of excitation of the acoustic field is investigated for sources with various frequencies. the effects of an isotropic medium, inclined formation of different azimuth, horizontal or vertical fracture and its width or density on the propagation of the acoustic field are investigated. the fluid in borehole is also investigated
研究了聲源在不同頻率下的聲場激發特性，考察了井外介質為均勻介質、存在不同傾角的地層界面、存在水平和垂直裂縫以及裂縫寬度和密度等對井內外聲場傳播的影響以及井眼流體對井孔聲場的影響。
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