At last, making use of SEA method get the non-resonance coupling loss factor of sound.
并求出其他的统计能量的参数，计算出隔声罩的隔声量。
This paper includes two parts: theory and simulation. The theory part is based on an enclosure model. In order to consider structural-acoustic coupling of the enclosure, two formulas are deduced. One is used to describe the amplitude of sound pressure that can be gained by combining Green function of fluid, Helmholtz equation and boundary conditions. The other is used to describe the amplitude of velocity that is obtain by combining Green function of structure, vibration equation of a panel and boundary conditions.
以封闭声腔为模型，在考虑流固祸合作用的基础上，结合流体格林函数和Helmholtz方程及其边界条件，导出了各阶声压模态对应的声压振幅响应公式；结合结构格林函数和板的振动方程及其边界条件，导出了各阶板模态对应的速度振幅响应公式。
The resonance frequency and the sound pressure level decreases because of the coupling between the interior heavy fluid and the shell.
b 当内部流体呈现低马赫数流动时，对于顺流传播情形，随着流速的增加，声压级的幅值及峰值频率均增加；反之亦然。
The speaker with an upper case, a frame, a vibration plate, a voice coil, a yoke, a magnet, a top plate and a printed circuit board includes a housing for accommodating the vibration plate, the voice coil, the yoke, the magnet and the top plate, the housing being formed by coupling the upper case and the frame, a sound emission hole formed in one side surface of the housing, a sound pressure adjustment hole formed by penetrating the upper case, and a resonance space formed in an outer circumference of the upper case.
具有上壳体、框架、振动板、语音线圈、轭铁、磁体、顶板和印刷电路板的所述扬声器包括：壳体，用于容纳振动板、语音线圈、轭铁、磁体和顶板，所述壳体通过将上壳体和框架结合形成；声音发射孔，形成在所述壳体的一侧表面中；声压调节孔，通过穿透上壳体而形成；谐振空间，形成在上壳体的外周上。
Then we seek the best experiment condition through changing the quantity of coupling agent occasionally and suitable ultra sound temperature.
于是我们通过改变偶联剂的量以及合适的超声温度寻求最佳的实验条件。
The article has carried out thorough research on mechanism of road tire noise production, the coupling prediction model and coupling factor having brought forward on the road and tire noise, have reached time domain wave and frequency spectrum of road sound production.
文章对道路与轮胎噪声的综合发声机理进行了深入的研究，分析了影响道路发声的大小的因素，提出了道路和轮胎噪声的耦合预测模型及耦合因子行阵，得出了道路发声的时域波与频谱。
Dynamic coupling drive, no friction and impact sound.
盘动联轴器，深井泵无摩擦及碰撞声音。
Utilizing the finite element method this paper established a 3D sound-structure-coupling model of car cab, the vibration characteristics of sound-structure-coupling of cab for frequencies from 20 to 200 Hz was calculated with ANSYS.
文中利用有限元方法，建立汽车驾驶室三维声固耦合模型，在ANSYS中计算了驾驶室在20~200 Hz频率的声固耦合振动特性。
Structure-acoustic coupling field; sound loudness; finite element method; enclosed cavity; critical-band level
结构-声耦合场；响度；有限元法；封闭空腔；特征频带声强级
ABSTRACT Cylindrical shell stiffened by ring ribs is the main structure model of underwater vehicle, which includes torpedo and submarine, etc. Research of sound and vibration coupling characteristics of cylindrical shell, will be helpful to find out the mechanism of sound radiation from underwater aircraft.
水中加肋圆柱壳体结构是水下航行器的基本结构形式，研究其在水中的声-振耦合特性有助于揭示水下航行器噪声辐射的机理，并对提高水下航行器隐蔽性和进行低噪声声学设计有重要的意义。
Wave coupling between fluid and pipe wall, sound propagation through the pipe/plate joints, and the effects of fluid loading on radiation surface are extensively analyzed.
为此，本文以具有弹性障板的有限长液体管道为研究模型，逐步开展了理论求解、数值计算、结果验证以及控制策略等方面的研究，全面考察了管内流体和管壁之间、弹性障板和管口与外部流体负载之间、弹性障板和管口的声辐射之间以及弹性障板和管壁之间的声振耦合对系统声传播及其声辐射的影响。
This paper summarizes the study progress on the impending earthquake prediction by Chinese scientists from the method of multi-subject intersection and the internal and external factors coupling. Depending on very hard work during recent years, they get some important signals of predicting impending earthquakes, including the anomalies of infrasonic sound wave, crustal stress, behavior of budgerigars, general geoelectric, geomagnetic, satellite heat infrared and high frequency gravity pulsation.
文章综述了中国科学家从多学科交叉和内外因耦合的科学途径，已在大地震临震信号方面获得了次声波异常、地应力突跳、虎皮鹦鹉跳跃异常、地电和地磁异常、卫星红外异常、重力高频脉冲等临震预测的手段。
In the experiment, an accelerater is used as sensor to pick up the vibration signal of aerofoil, loudspeakers are used as vibration control sources, the aerodynamic load on the aerofoil is produced by the coupling of sound and vortex.
实验中采用加速度计作为传感器，拾取机翼振动的信号，用扬声器作为振动控制源，通过声—涡的耦合来产生作用在机翼上的气动载荷。
After solving the coupling equation, several parameters, which indicate the general characteristics of the shell vibration and sound radiation are calculated. The parameters are the acoustic radiated power level, the radial quadratic velocity level and the radiation efficiency.
通过求解流固耦合振动方程，计算了壳体在径向简谐激励下的表征壳体总体振动与声辐射的几个物理量：辐射声功率级、振动均方速度级和辐射效率。
It is shown that the acoustic power radiated by panel structure depends on not only exterior sound field and natural characteristics of panel but also modal coupling characteristics between acoustic cavity and panel structure.
研究表明：壁板结构的辐射声功率不仅与外场声场声压、壁板本身的固有特性有关，而且与壁板和内声空间的耦合特性密切相关。
The distribution of 2 D steady state temperature field induced by focused ultrasound heating has been calculated with difference method. Characteristics of sound field and temperature field, and the relation between the width of coupling layer, the size and the position of treated area are presented.
本文运用差分法求解了聚焦超声加热的二维稳态温度场，比较了声场与温度场的特征，分析了耦合层厚度与治疗区大小、位置的关系。
The article puts forward the innovative thought on this question, use the photoelectrical coupler to isolate coupling, utilize the fine characteristic of the photoelectrical coupler and advantage of BTL circuit's great power output, under the output power of 400W, nearly replay the sound undistortedly.
本设计采用光电耦合器隔离耦合，利用其优良特性和BTL电路大功率输出优点设计的音频功率放大器，在400W的输出功率下，几乎能不失真地重放声音。
Listen for a clearly audible locking sound when fitting all rapid-action coupling connections and cable plugs.
安装所有快接管接头和电缆插头时，请注意听是否有清楚的卡入位的声音。
10 Foot chip to the left and right input signals, then there is a general of the resistance and a coupling capacitor, to find two small wires, solder in the 7, 10 feet, the other end, respectively, in the sound card output socket welding of on compasses.
芯片的7、10脚为左右声道信号输入端，一般各接有一电阻和一耦合电容，再找两根细导线，焊在7、10两脚上，另一端分别焊在声卡输出插座的两脚上。
In this paper, the effects of EPR content, rockwool content, the void fracture and the coupling agent on the sound absorbing property of the material were discussed in...
此外，对增塑剂和发泡时间及温度对空隙率的影响也作了简要介绍。