因此对发动机进行降噪一个直接的方法就是对表面噪声进行屏蔽。
So a direct method to reduce the engine noise is to insulate the exterior radiation noise.
通过测量柴油机表面振动速度的方法对其进行了表面噪声源识别的研究。
An experimental study on the engine noise source identification by the method of surface vibration measurement technique is carried out in this paper.
此外，发动机位于后部上表面，提供了自然的噪声屏蔽，使得配置在起飞和着陆期间更安静。
In addition, the engines are located on the aft upper surface, providing natural noise shielding that makes the configuration quieter during takeoff and landing.
这不仅限于准确性的灵敏度拾音器系统，但在质量，轴表面和噪声所产生的轮换。
This accuracy isn't limited by the sensitivity of the pickup system, but by the quality of the shaft surface and the noise generated by the rotation.
考虑了工作信号躁声，感光光电二极管深嵌入硅片中，与芯片表面上产生噪声的元件相隔离。
Operating signal noise was also considered, and the sensor photodiodes were deeply embedded in silicon to isolate them from noise-causing elements on the chip surface.
导线风噪声是风吹过导线后，由导线表面的流体剥离所引起的压力变化所产生。
The wind noise of transmission conductor has been produced by pressure variation caused by the fluid peeling on the conductor surface after wind blowing.
对发动机表面辐射噪声控制的研究已受到越来越多的汽车生产企业的重视。
More and more automobile enterprises have attached important to research into the control of radiated noise from engine surface.
低表面能涂层涂覆在铝合金模型上，考察了其在水筒中低频段降低流噪声的效果。
The flow noise reduction of al alloy model with low surface energy coatings have been studied in a water tunnel.
由表面发射激光放大器和检测器组成的光接收器的噪声因任何增益的非均匀性而增加。
The noise of an optical receiver consisting of a surface emitting laser amplifier and a detector is enhanced by any lack of gain uniformity.
以4120SG柴油机为研究对象，提出基于激光测振的表面振动法测量柴油机辐射噪声。
The laser vibrometer based on the surface vibration for measuring and analyzing the radiating noise of the 4120SG diesel engine is proposed.
试验结果表明，这种新型减振端铣刀不仅可以减少振动和噪声，而且还可以提高表面加工质量和刀具寿命。
The experimental results have shown that the modern vibration-free face-milling cutter can not only reduce vibration and noise but also increase the surface finish quality and tool life.
本文从声学振动理论出发，分析并导出了结构的振动与表面辐射噪声的关系。
In this paper, the relationship between the structure vibration and the surface noise radiation is analyzed and deduced from the acoustic and vibrational theory.
又通过发动机机体表面振动加速度，确定活塞敲击噪声产生的根源在于活塞与缸套的碰撞冲击。
It has also been clear that the source of piston knock noise is the impact between piston and cylinder sleeve by the vibration acceleration of the engine's body surface.
为避免该问题，本研究将散斑视为含有表面结构有用信息的载体，而不再视为噪声，提出了一种基于散斑技术的测量方法。
To avoid this, a speckle method is proposed, where the speckles are regarded as the useful carrier of the information of surface microirregularities but not the noise.
以声表面波延迟线为核心的距离欺骗、多重回答欺骗、噪声欺骗技术是对雷达信号的综合干扰手段之一。
With the core of SAW delay line, deception jamming of distance, multiple reply and noise has become one of the comprehensive interference methods against radar signal.
本文应用声学仿真的方法对125-C型摩托车变速箱端盖进行结构优化设计，达到降低表面辐射噪声的目的。
In this paper, the acoustic simulation was applied to improve the noise performance of gearbox cover on the motorcycle of 125-C with the low vibro-acoustic structure design.
通过实验研究了巴克豪森噪声强度与铁磁材料表面硬度之间的关系。
The relationship between the surface hardness of ferromagnetic material and the intensity of Barkhausen noise was studied.
结果表明，采用的方法能有效抑制飞轮壳的表面辐射噪声。
The results show that the method adopted can effectively suppress the radiated noise from cover surface.
本文的研究重点包括车身表面脉动压力的求解和分析、车外远场噪声和车内噪声的预估以及实车道路试验研究。
This study focused on analysis of pressure fluctuation on the body surface, prediction of exterior far-field noise and interior noise and the road tests.
而且由于弹性板的柔性和抗弯性的折中，使得在测量数据存在噪声和数据出现重复的情况下也能得到需要的拟合表面。
Owing to the flexibility and bending elastic plate of trade-offs, surface can be fitted when data is noisy or duplication.
由于声表面波压电效应产生的电压信号非常微弱，一般放大不能分辨出信号电压和噪声电压。
Generally, because the output voltage signal is very weak, the signal voltage and the noise voltage can't be distinguished.
在导线表面采取缠绕扰流线措施或直接使用低噪声导线，能够降低导线风噪声和电晕噪声水平。
The measures to disturbing the current by means of winding on the conductor surface or application of low-noise conductor can reduce the level of wind noise and corona noise.
动力机械的辐射噪声产生于结构表面振动，通过控制振动来控制其辐射噪声是机械工程师长期追求的目标。
The radiated noise of the dynamical mechanism comes from its surface vibration. Controlling the vibration to reduce the radiated noise is a long-term aim for most researchers.
控制发动机表面辐射噪声是降低汽车噪声最根本有效的方法之一。
One of the most fundamental and effective methods to reduce automobile noise is the control of radiated noise from engine surface.
计算机模拟和实验结果均证明，此方法能有效地去除相位图中的噪声，实现带噪声的主值相位图的相位展开，可靠地重建被测物体的表面形貌。
Computer simulation and experimental results make it clear that this method can effectively remove noise in phase map, unwrap the wrapped phase, and reconstruct the surface of the detected object.
该收集装置结构特别简单，维护量很小，使用该收集装置能消除噪声，并保护钢管表面质量。
The collecting device has the advantages of simpler structure and less maintenance amount, can eliminate noise, and protects quality of the steel pipe surface.
结果证明，通过结构参数的改变来降低表面辐射噪声是行之有效的。
The results of this paper proved that it is effective to reduce the engine surface noise by changing the structure parameters.
试提出一种高荧光及强背景噪声情况下表面增强拉曼散射光谱的提取方法。
A spectrum signals detection method has been designed for surface enhanced Raman scattering (SERS) under high fluorescence and background noise.
消声器的外表面采用厚钢板，以控制噪声的投射型。
The muffler uses the thick steel sheet as its exterior surface so as to prevent noise from diffusion.
消声器的外表面采用厚钢板，以控制噪声的投射型。
The muffler uses the thick steel sheet as its exterior surface so as to prevent noise from diffusion.
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