声压

利用Matlab仿真并分析了纵向声压分布情况。

Using of Matlab software simulation and analysis of the distribution of the longitudinal sound pressure .

此外，定义了描述空化强弱的空化系数K，并将其与通过理论计算所得的空泡振动最大声压进行比较后发现两者有着较好的一致性。

Moreover , the cavitation coefficient that can describe the strength of cavitation is definitude . It has a good consistency with the theoretical maximum sound pressure .

总统的讲话被数百名反对人士的怒喝声压过。

The president was howled down by hundreds of opponents .

结果表明，当折转角为30°～60°和折转长度（b）与振荡波长（λ）相当时（b/λ≈1.0），折板具有显著的削弱振荡声压的效果；

The results show that the bent plates with angels of 30 ~ 60 and a length about an oscillating wavelength diminish the sound pressures notably .

进一步得出了声压反射系数模r（f）极小值与涂层声速和厚度之间的关系。

The relationship between the minimum of the mode of ultrasonic reflection coefficient , ultrasonic velocity and coating depth is acquired .

重点推导了基于表面Rayleigh积分方程，并对其进行离散化，得出辐射声压的求解表达式。

It mainly derive Rayleigh integral equation based on surface , and discretize it .

测试了利用调Q的Nd∶YAG脉冲激光在水中诱导金属钛产生等离子体冲击波的声压和速度。

The pressure and velocity of the shockwave generated by the Ti induced plasma with a Q-swithced Nd ∶ YAG laser were measured .

HIFU场中声压的光纤光栅偏振型测量理论分析

The Theoretical Analysis of Polarization Type Measurement of Fiber Gratings about Acoustical Press in HIFU Field

结果表明，此类声压水听器具有较高的灵敏度，测量结果与ANSYS软件的计算结果基本吻合。

The tests show that this type of hydrophone have much higher sensitivity , this tested results is basically consistent with the calculated results of ANSYS software .

用推迟势计算了脉冲波声场的声压公式，克服了Fourier分析中对频率求和的困难。

By Employing the retarded potential in calculating sound pressure in the pulse - wave sound field . difficulties of frequency summation in Fourier analysis can be overcome .

而声压通道采用PVDF压电薄膜作为敏感元件，以拾取水下声场中的标量信息。

A PVDF piezoelectric membrane is used as sensitive element for measuring the scalar pressure of the underwater sound field .

首先推导了基于Fourier变换的时域声全息的声压重建公式，并从理论上分析了声压重建过程中的误差及其控制办法。

Its reconstruction formulas of sound pressure were deduced based on Fourier transform , and its reconstruction errors as well as the corresponding control methods were analyzed in theory .

无限长FFS圆柱壳体远场辐射声压的参数研究

Parametric study on far-field sound pressure radiation from an infinite FFS cylindrical shell

对锅炉、电站用大口径厚壁无缝钢管的超声检测中若干问题进行了探讨，包括探头声压分布、K值及钢管曲率影响等。

Some problems in automatic ultrasonic inspection of the large diameter thick-wall steel seamless tubes for boilers and power plants are discussed including sound distribution , K value and tube curvature effect on inspection , etc.

为了提高光纤布喇格光栅（FBG）水听器的声压灵敏度，提出了一种基于薄壳弹簧的增敏结构。

For the purpose of improving the acoustic pressure sensitivity of the Fiber Bragg Grating ( FBG ) hydrophone units , a sensitization configuration based on shell spring is presented .

并且，消雾的效果随着作用声波的频率和声压级（SPL）呈规律性的变化趋势。

And , the dissipating speed of water fog regularly altered following the different frequency and the Sound Pressure Level ( SPL ) .

本文从经典Rayleigh简正级数解出发导出共振声辐射公式，然后分别用经典公式和共振声辐射公式计算钢圆柱壳的辐射声功率及壳体表面声压曲线。

Firstly , the resonance radiation formula is derived from classical Rayleigh normal mode solutions , then numerical calculation for a thin steel cylindrical shell is completed by using these two methods .

然后，利用谱截断正则化和Tikhonov两种正则化方法对点焊热声源声压幅值进行了模拟计算。

Then , using the spectral truncation method and the Tikhonov regularization method to calculate the thermoacoustic pressure amplitude of the source was simulated .

对1400Hz-3200Hz的声波垂直通过管阵列结构模型前后的声压级（SPL）进行了实验测试，发现了多处频段声压的加强与减弱区。

We tested the sound pressure level before and after the sound ( 1 400Hz ~ 3 200Hz ) passed through the steel array structure perpendicularly .

采用染料激光器作为激励光源，用光纤位移传感器代替传统的微音器，测量被气体吸收并转变为声压信号，从而对SO2气体浓度进行测量。

Using laser source as incentive light source , and using optical fiber sensor instead of traditional microphone measure the photoacoustic signal absorbed by SO_2 gas and the concentration of gas can be obtained .

基于AVS中声压和振速的相干性原理，提出了一种新的声矢量阵最小范数算法。

The new mini-norm algorithm is based on the principle of coherency between pressure and particle velocity and has better DOA estimation performance than existing algorithms in isotropic noise field .

采用pp法计算声强时，需要将两声器测得的声压进行平均作为被测点的声压，将两声压进行差分计算来间接获得声振速。

When calculating the power of sound source using the p_p strategy , the sound pressures obtained via two microphones should be averaged to get the average sound pressure of the estimated point , and from the differential of the two sound pressures the sound vibrating speed can be derived .

应用Neumann外边值问题的谐和Green函数解得声压的表达式，再用壳体表面的边界条件来求解，得到壳体振动所产生的用壳体位移来表示的声压表达式。

The harmonic pressure can be expressed by using the well known harmonic Green 's function for the exterior Neumann boundary value problem , and be solved by boundary conditions of the shell surface to obtain the pressure expression .

结果：分别在F1和F2点测得光击穿及空化气泡闭合与反跳时产生的声压脉冲信号；用石膏小球进行了碎石演示性实验，取得初步结果。

Results : We measured the pulse sound pressure from water broken down and bubble collapse near F 1 and F 2 respectively and made the simulated lithoclastic experiments for a small plaster ball .

400～5000Hz频率范围内SEA模型的计算结果与车内声压水平实测值的误差达到3dB以内。

The interior car sound pressure level results of the SEA model obtain a difference of less than 3 dB compared to the test data over the frequency range of 400 ~ 5 000 Hz .

数值计算了全船与典型舱室声压分布，为FPSO声学设计和噪声控制提供依据。

This paper also gives the computational results about sound pressure distribution in the whole ship and the typical cabins , which can provide measures for acoustics design and noise control in FPSO .

本文提出的声场分离技术利用波场的外推理论，建立起在波数域声场分离的公式，然后通过二维Fourier逆变换，便得到了全息面一侧声源产生的声压，从而达到声场分离的目的。

The technique builds the sound field separation formula in wave number domain according to the wave field extrapolation theorem , and the sound pressure caused by sources on one side of holographic plane can be obtained as expected by taking two-dimensional Fourier transform of the formula .

环肋圆柱壳声辐射的研究中，用Helmholtz波动方程和流固交界面上的速度相容条件求得壳体表面辐射声压的表达式，以及内部声场的声压对系统结构的影响。

The sound radiation field out of the shell is resolved by applying Helmholtz equation and the continuity conditions of the displacement on the surface of fluid-structure , and the expression of sound pressure is obtained by Fourier transform .

结果表明，滤布的振动以及滤袋的残余压力降低率（PDR）和清灰周期延长率（PTE）随声波频率的减小和声压的增大而增大。

The results obtained demonstrate that the cloth vibration , the residual pressure drop rate and the cleaning cycle extention rate of the bag increase as the sound frequency decreases or as the sound pressure increases .

该SH1800的设计，以增加低频声压自置居所的乐富豪专业系列扬声器，或其他全音域柜的能力。

The SH1800 is designed to augment the LF SPL capabilities of Wharfedale Pro SHO Series loudspeakers , or other full-range cabinets .