声功率

Kalman滤波器在医用超声诊断设备声功率计量中的应用

Application of Kalman filter to measurement of sound power for medical ultrasonic diagnostic equipment

在HIFU聚焦探头声功率测量中，常用吸收靶来进行声功率测量。

In measuring ultrasonic power of HIFU transducers , absorbing targets are often used .

辐射声功率级、表面振动均方速度级和辐射效率级都随着复刚度值Z的减小而减小。

The radiation sound pressure level , the mean vibration velocity level , radiation efficiency reduce with reducing of the complex stiffness .

小波包分解Welch平均法在焊接电弧声功率谱估计中的应用

Application of wavelet packet analysis and Welch method in power spectrum evaluation of arc sound

ASAC系统最终的目的是控制辐射声功率。

The aim of ASAC is to control radiation power .

当功率超过200W以上时具有除垢效果，并且除垢效果与波声功率成正比。

The incrustation removal effect is in direct proportion to the magnitude of the ultrasonic wave power .

得出结论：同一位置受单位力激励时，Mx激励的声功率最高，Fr居第二，Fx最低；

It is concluded that the sound radiation power is highest driven by Mx , secondly is driven by Fx , the lowest is by Fx at the same value and the same position .

基于声功率的二次型表达式和Rayleigh积分建立了辐射声功率与激励力之间的关系，在此基础上得出以力为变量的声功率表达式。

The relationship between the radiated acoustic power and the exciting force is obtained based on the quadratic form of the acoustic power and the Rayleigh integral . The acoustic power is then expressed directly by the exciting force as the variable .

以某四缸柴油机为例，利用ATV技术，计算得到了整机结构辐射声功率、外场域点声压（级）、结构面板声学贡献、辐射效率等声学响应。

Engine was studied . Taking a four-cylinder diesel engine as an example , acoustic response such as the entire engine 's radiation power , the field point sound pressure level and the panel acoustic contribution , radiation efficiency etc.

综合运用文中的降噪措施，标定工况时整机噪声A声功率级降低了2.5dB。

Combining all above measures can reduce the noise power level of complete engine by 2.5 dB ( A ) at rated power mode .

换能器具有良好的长期稳定性，故标准超声功率能以测量射频电压的精确度来再现，在1～5MHz频率范围内，以5%的不确定度传递1～500mW的声功率。

With its excellent long-term stability , it can be used in the power range of 1 to 500 mW within 1-5 MHz with an overall uncertainty less than 5 % .

随后，建立了SCLD系统辐射声功率预测模型，基于数值方法，开展了SCLD薄钢板结构辐射能力及其影响因素研究。

Then a radiated acoustic power forecast model of the SCLD system is established . Based on the numerical methods , the radiation ability and its influencing factors of sheet steel with SCLD structure are investigated .

以0.8MHz、焦距120mm、定点点打、声功率220W连续照射两组实验犬肝右叶90s，对肝毁损灶进行面积和体积测定及病理学检查。

The dogs of experiment group undergoing simulative partial costectomy and costophrenic angle closure were continuously exposed to HIFU with 0.8 MHz waves , 120 mm focal distance , fixed-point exposure , and 220 W sound power for 90 seconds . The liver damage area were measured and observed pathologically .

测试发现，该柴油机在标定工况下的噪声声功率级为113dB（A），已满足国际规定要求，并且低于我国中小型功率柴油机噪声限值及国内同类机型产品的噪声值。

The test shows that the noise sound power level of the diesel in standard situation is 113 dB ( A ), which is lower than the limit of China ′ s medium-size diesel engines and that of the same products in China .

粗纱机噪声声功率级的测定与分析

Measuring And analysing for the sound power level of Roving Frame

狭小空间条件下的声功率测量

Sound Power Measurement in a Narrow Room Chat Room Next Room

一种机器噪声声功率级自动检测方法

An Automatic Detecting Method about the sound Wavelength of Machine Noise

电机电磁振动辐射的声功率和声场分析

Analysis of Acoustic Field and Power Radiated by an Electrical Machine

小型圆盘锯机锯切声功率的计算分析

Calculation Analysis of Cutting Sound Power in Small-Sized Disk Saw Machine

GB/T3770-1983木工机床噪声声功率级的测定

Determination of sound power level for noise emitted by woodworking machinery

基于统计能量模型的辐射声功率灵敏度分析

Radiated Sound Power Sensitivity Analysis Based on Statistical Energy Analysis Model

辐射压力法测量声功率是一种常用的超声功率测量方法。

Radiation pressure method is often used in ultrasound power measurement .

中国传统民族乐器琵琶的声功率测试

Sound Power Level Measurement for Pipa-One of Chinese Traditional Instruments

GB/T4214-1984家用电器噪声声功率级的测定

Determination of sound power levels of noise emitted by household electrical appliances

声压级及声功率级的测量和计算。

Measurement and calculation of sound pressure level and sound power level .

最后本文给出了应用本系统测量电机声功率的例子。

An example of sound intensity measurement for electric motor is presented .

利用有限元法分析电机辐射的声功率

Finite Element Analysis of Acoustic Power Radiation by Electrical Machines

7声功率对铜电化学阴极沉积过程速率的影响

Effects of ultrasonic power on voltammetric curves for copper electrodeposition

噪声源声功率级测量的进展

The Progress in the Measurement of Sound Power Level of Noise Source

半混响环境中水下结构辐射声功率测量

The determination of radiated sound power from underwater structures in a semi-reverberant environment