The acoustic resonant phenomenon shows the selective frequency response of the arc ultrasonic. 发现了电弧超声的若干谐振频段并对电弧频率响应的选择性现象进行了初步分析。
Monitoring of microbial inhibition process by bulk acoustic wave impedance technique and the relative frequency shift response model 用声波阻抗传感技术监测细菌的生长抑制过程及其相应的频移响应模型
Compared with the surface acoustic wave filter with same period and same size of all fingers of interdigital transducers, the frequency response of that which based on evolutionary design is improved greatly, especially in its side lobe suppression. 与典型的等周期、等指长的声表面波滤波器相比,采用进化方法设计,极大地提高了滤波器频率响应性能,旁瓣抑制得到了改善。
Base on the theory of dynamics and acoustic radiation and choosing the stiffened plate as example, the characteristics of natural frequency, static response, exited vibration, power of radiation and directivity of sound are researched respectively. 本文采用结构动力学和声辐射的有关理论,以加筋板结构为例,分别研究了水中含损伤结构的固有振动特性、静力特性、强迫振动特性、辐射声功率、辐射指向性等特性参数。
Several simple acoustic low-pass filtering fiber-optic hydrophones are designed, and the acoustic pressure phase sensitivity frequency response properties are investigated in terms of theories, simulations and experiments. 设计了几种简单的水声低通滤波光纤水听器,对它们的声压相位灵敏度频响特性进行了详细的理论分析、仿真和实验研究,取得了一些成果。
Underwater acoustic low-pass filtering fiber-optic hydrophones of second-order, forth-order, and with side cavity are designed based on the model and theories given in this paper. And the acoustic pressure phase sensitivity frequency response properties are investigated in terms of theories, simulations and experiments. 基于本论文建立的水声低通滤波理论及模型,设计了二阶、四阶和带侧支的三种水声低通滤波光纤水听器,并对它们的主要声学特性进行了理论分析、仿真和实验研究。
From the acoustic pressure distribution and the pressure frequency response function of the one dimensional finite multilayer structure and the two dimensional finite periodic structure with square scatterers, the directional acoustic wave band gap structures are obtained. 通过对一维层状周期结构和二维正方形截面散射体周期结构的声压频率响应函数曲线来确定其不完全声波禁带。