Phonons have complicated dispersion relations which generally have several acoustic and optical branches, the phonons in acoustic branches called acoustic phonons. The dispersion of acoustic phonons are linear around the center of the first Brillouin zone.

Application of Acoustic Wave Formation Factors Formula to Wenliu Oilfield Acoustic Wave Equation with Dispersion STRATUM

声波地层因素公式在文留油田的应用

The acoustic dispersion of rocks is investigated with experimental method samples of sandstone and shale are measured at different frequencies with ultrasonic pulse penetration method, and then the acoustic dispersions are analyzed.

对岩石声频散进行了实验研究，用不同频率的声学探头使用超声波脉冲穿透法对砂岩和泥岩样品进行了测量，并分析了两者的频散现象。

Based on the results of dispersion experiments on cores of sand and shale, the paper analyzed the variability of acoustic dispersion for dry and water-saturated cores.

结合岩心砂泥岩频散特性实验结果分析了岩心在饱水及干燥状态下声频散的特点。

For clean sandstone, the acoustic dispersion of compressional wave exists obviously when its porosity is more than 28%.

对纯砂岩，当孔隙度大于28%时存在明显纵波声频散。

An experimental study of acoustic dispersion of rock and extrapolation of the velocity

岩石声频散的实验研究及声波速度的外推

A Survey on the Acoustic Dispersion in Shaly Sandstone

泥质砂岩声频散性考察

Surface Acoustic Wave filter and ceramic filter are primarily used in the traditional wireless communication systems; they can not meet the needs of current communication system because of large volume or low operating frequency.

传统用于无线通信的带通滤波器以介质陶瓷滤波器和声表面波滤波器为主，他们因为体积大或工作频率低等因素已经不能满足需要。

Surface Acoustic Wave Filter ( SAWF) is a sort of analogue device for signal processing.

声表面波器件是一种新型的模拟信号处理器件。

The utility model adopts surface acoustic wave filter, and the circuit is simple to realize.

采用声表面波滤波器，电路实现简单，调整方便，一致性好。

Evolutionary Design for Surface Acoustic Wave Filter

声表面波滤波器进化设计

Design of a RF Bulk Acoustic Wave Filter Using PZT Thin Film

采用PZT薄膜的体声波RF滤波器设计

Application of surface acoustic wave filter in television

声表面波滤波器在电视机中的应用

Analysis of the response of surface acoustic wave filter using admittance parametric

应用导纳参量分析声表面波滤波器的响应

Exploration on Teaching of Surface Acoustic Wave Filter and Developing Students' Comprehensive Ability

声表面波滤波器教学与学生综合能力培养的探索

Evolutionary design for surface acoustic wave filter based on genetic algorithm

基于遗传算法的声表面波滤波器进化设计

Inversion method of physical parameters in concrete based on the acoustic frequency detection technique

基于音频检测技术的混凝土无损检测技术

Research on Effect of Technology on Plant Acoustic Frequency Control in Cotton

植物声频控制技术在棉花上的应用效果研究

Application of acoustic frequency technique in shipbuilding technology

声频技术在船舶建造工艺中的应用

Application of acoustic frequency technology to protected vegetable production

植物声频控制技术在设施蔬菜生产中的应用

Emphasis is placed on the acoustic survey, which includes survey design, acoustic instrument calibration, survey data collection, fish target strength determination, echogram scrutinizing, data processing and fish biomass estimation.

其中重点介绍了声学调查与评估，它包括调查设计、数据采集、目标强度确定、映像分析、数据处理、生物量计算等。