In order to further improve the performance of acoustic power output and make full use of acoustic energy of TE, experiment study on double-output method is made.
为进一步提高热声发动机的声功输出能力，实现能量的梯级利用，本文对本课题组提出的双路声功输出方案进行了实验研究。
Series: a series of competitive audio products with high performance and reasonable price. With complete function of input-output systems, perfect acoustic feeling. This series uses the lastest technology, most advanced circuitry design. Every track is powered by separate power supply. There are 3 working modes, stereo, balance and bridging.
系列功放机是一款性价比较高具有竟争力的专业功放，输入输出系统功能齐全，音质细腻而颇有解析力，采用最新的技术、最先进的线路计而成，每个声道由独立的电源供电，三种工作模式：立体声、平衡和桥接，并具备高通、低通和直通功能。
And despite its power, the 1.4 TFSI sets new benchmark standards in its class for its acoustic output too.
尽管它的权力，1.4 TFSI发动机规定了其声输出在同类产品中的新基准了。
With working pressure and maximum pressure ratio in the torus of 2.4MPa and 1.20 respectively, investigation on acoustic power output from the torus and resonator simultaneously is carried out when nitrogen gas is used. The maximum output power, thermal efficiency and exergy efficiency reach 364.25W, 11.2% and 16.02%, which increase by 52.2%, 33.3% and 22.57% respectively than those using only one R-C load in the torus.
以氮气为工质，工作压力为2.4MPa，在热声发动机环路压比稳定在1.20的情况下，从环路声容和谐振管处同时引出声功，获得了364.25W的最大声功，11.2％的最大声功输出效率以及16.02％的最大声功输出效率，这比单独从环路引出时分别提高了52.2％，33.3％和22.57％。
Using nitrogen as working fluid at 2.20 MPa, the pressure ratio of 1.50 was obtained at the end of the coupled system, and the maximum output acoustic power obtained under certain resistance was 105 W.
实验中采用高纯N2作为工质，当工作压力为2.20MPa时，在耦合系统末端获得了1.50的压比；在一定的输出阻抗下获得了105W的输出声功。
The conventional numerical simulation of a reverberant field as a launch acoustic environment was introduced. Following the reciprocity theorem used in the coupled FE-BE model, the structural response due to reverberant acoustic excitation was substituted by the sound pressure caused by force excitation on the structure, then the output response power spectrum density of the coupled model subjected to reverberant environment was evaluated based on the stochastic analysis principle.
首先介绍了传统的构建混响声场的数值模拟方法；其后利用声振耦合中的互易定理，将混响声场的激励问题转化为结构模型上力激励引起的场点声压响应问题，并采用随机分析原理，用谱分析方法推导了结构在混响声场激励下的响应计算公式；最后建立了航天器典型结构的声振耦合模型，并分别用传统方法和利用互易定理的方法进行了数值模拟。
The method of the invention comprises the following steps: a sound velocity meter measures the acoustic velocity of water; a horizontal receiving array receives a radiation signal of a plurality of point sources in a sound field, amplifies the filtration and then carries out the data acquisition; the weight obtained by realizing the sound focusing of a spherical sound field array is the optimum focusing weight; based on the optimum focusing weight, shielding factors are increased to obtain the optimum focusing shielding weight; the output waveform is obtained by inverse Fourier transform and output power also can be obtained by frequency domain integral; the following coherent processing is carried out or the power after sound shielding and focusing is output.
由声速仪测量水的声速；水平接收阵接收声场中的多个点源的辐射信号，放大滤波，然后进行数据采集；实现球面波声场中阵的声聚焦，得到的权值即为最佳聚焦权；在最佳聚焦权的基础上，增加屏蔽因子，得到最佳聚焦屏蔽权；进行反傅立叶变换可得到输出波形，也可进行频域积分得到输出功率；后续相干处理或输出经声屏蔽、聚焦后的功率。
It was experimentally proved for the first time that the maximum acoustic power output can be transferred to the load when the acoustic resistance of RC load equals to its acoustic capacitance impedance.
首次通过实验验证了当声阻与容抗相等时，热声发动机向阻容负载传递的声功率最大。
By adjusting valve opening and the volume of the gas reservoir, the influence of resistance and empty volume of load on the acoustic power output and thermal efficiency of the engine was also investigated.
通过改变阀门开度和气库容积大小，分析了负载的阻力和空体积对声功输出和系统热效率的影响。
This paper presents a novel electronic equipment with which laser beam stability excelling 0.5% can be obtained, and its output noise in comparision with that obtained with an ordinary stabilized current power source can be reduced by about 20 dB in the acoustic frequency range.
本文介绍了一种新型电子学装置，它可以使小功率He-Ne激光器输出功率稳定度达到0.5%，在声频范围的噪声与通常稳流电源相比，可降低20dB。
The output part of the electronic circuit controls a main electric power source, an acoustic horn loop and a brake system.
电子线路输出部分控制车辆的用电总电源、喇叭回路及刹车系统。
It is also shown that the resonance frequency of the resonant pipe is the optimized operating frequency and a high acoustic output power can be achieved when the total reactance of the system equals zero.
结果表明，谐振管的谐振频率即为系统的最佳工作频率，而当系统总的抗性为零时，扬声器输出较大的声功率。
The active stabilization system utilizes opto-acoustic effect and electronic feedback to lock the cavity length to the maximal absorption of a sample gas. Output power stability of better than 1% was achieved for the long and short term.
主功稳频利用光声效应及电子学反馈系统使其工作频率稳定在样品吸收的极大值处，得到了优于1%的输出功率稳定和好的频率短期及长期稳定性。
This is achieved by investigating relationship between the probe output and the radiated acoustic power.
通过测量清洗液中的声功率与探头输出信号电压间的关系，用数字形式来显示超声场强度。
Sound intensity distribution and acoustic power output of a sound source in reverberation chamber
混响室内声源的声功率输出及声强分布
Results show that the sensor output signal in ˉ tensity is basically linear to the acoustic power which prompts us to detect ultrasound using optic fiber gratings sensors, provides a new method for noninvasive detection of ultrasound in body.
结果表明传感器输出信号强度与声功率表现了基本的线性性，提示可以利用光纤光栅检测超声，为体内超声场的无创测量提供了新的工具。
Experiments proved that the matching circuits designed were able to increase the output power of the transmitting circuit by 60%, which effectively boosted the whole efficiency of an EMAT detecting system, and provided a basis for application of the electromagnetic acoustic technique.
实验表明：所设计的匹配电路能够使发射电路输出功率增加60%，有效提高了检测系统的整体效率，为电磁超声技术的工程应用奠定了基础。
Methods Suspensions of Walker-256 hepatoma in vitro exposed to ultrasound disruption with the acoustic power output 022 W and the ultrasound frequency 42 kHz were observed by the scanning electron microscopy, the transmission electron microscopy and the flow cytometric analysis of DNA content.
方法体外超声消融（42kHz，0.22W）Walker-256细胞，扫描电镜、透射电镜和流式细胞仪分别观察细胞变化。
After acoustic power output of the thermoacoustic engine was measured accurately by variable-load method, the mutual relations of power output with pressure ratio, heating power and heating temperature were analyzed.
应用变负载法，对该热声发动机的声功输出进行了精确测量.分析得到声功输出与热声发动机压比、加热功率和加热温度之间的相互影响关系。
According to this concept a traffic stream of equally spaced vehicles with identical acoustic power output is equivalent to just one source situated between a pair of rigid image walls.
根据这个概念，由单车种等间距分布的车流所产生的声场可等效于位于—对假想的刚硬墙壁之间的单一车辆所产生的声场。