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.

The imaging logging instruments include the electric imaging logging instrument and acoustic imaging logging instrument, as well as the array nuclear imaging logging instrument and nuclear magenetic resonance imaging logging instrument which are under development.

成像测井仪有电成像测井仪和声成像测井仪，正在研究中的还有阵列核成像测井仪和磁共振成像测井仪。

Then according to the function of the instrument, adopting a distribution processing method, the paper has discussed the realization scheme of a dipole array digital acoustic well logging instrument based on DSP.

接着根据偶极子数字阵列声波测井仪的具体功能和性能要求，采用分布式处理的设计思想，论述了一种基于DSP的偶极子数字阵列声波测井仪的实施方案。

A Computer-based Acoustic Emission Detecting Instrument for Partial Discharge within Power Capacitor

电力电容器局部放电微机化声发射检测装置

The Design Of Digital Acoustic Well Logging Instrument Based on DSP

基于DSP的数字声波测井仪设计

The experiment content is the acoustic emission instrument detects the process of the pipes' plastic deformation until their rupture; then the results can be obtained with Matlab programs.

实验内容是：声发射仪检测带环向穿透裂纹管塑性变形，直至断裂的过程。接下来，用Matlab编程算出结果。

Research on Testing the Quality of Rock Mass with Boring Elastic Modulus Instrument and Acoustic Wave Instrument

钻孔弹模计及声波仪检测岩体质量的试验研究

Development of acoustic emission instrument

声发射仪器的发展

The Application of Acoustic Logging For Landslide Investigation

声波测井在研究滑坡中的应用

Acoustic methods for investigation of the physical characteristics of sea bottom

研究海底物理特性的声学方法

Acoustic emission investigation on surface quality of magnetic recording disk and mechanical performance of magnetic head

磁盘表面质量及磁头力学特性的声发射研究

It has put forward a imaging method of acoustic lens using photoacoustic signal and according to the Kirchhoff diffraction theory we deduced pulse response of acoustic lens.

光声信号声透镜层析成像方法的提出，并依基耳霍夫衍射理论推导了声透镜的脉冲响应。

By using complex amplitude to describe sound field distributing, acoustic lens pulse response is deduced in theory, and function imaging of biological tissue is obtained.

以声场复振幅来描述声场分布，根据基尔霍夫衍射理论，从理论上推导了声透镜的脉冲响应，并通过实验得到了生物组织的功能成像。

Al. had got 3-D real-time optoacoustic image with much higher optical contrast and ultrasonic resolution by using an acoustic lens system and CCD system.

Frenz等人也利用声透镜结合CCD成像方法实现了对光声信号的实时三维成像，并且获得的光声图像对比度和灵敏度都比较高。

Acoustic lens designing is a key technology on lens imaging sonar. Firstly the paper introduces the design principle of the lens in detail.

透镜设计是透镜成像的关键技术，本文系统介绍了声透镜的设计原理。

Rayleigh-Sommerfeld Diffraction Formula on the Thin Acoustic Lens With Larger Aperture

较大孔径薄声透镜声场的瑞利&索末菲衍射公式

Simulation research on acoustic lens beamforming

声透镜波束形成技术仿真研究

Studies on Acoustic Lens Imaging of Photoacoustic Signal

光声信号的声透镜层析成像研究

Now, focus transducers have three kinds of types: Focus transducer, acoustic lens, phased array focusing system.

到目前为止可以实现聚焦的换能器有三种类型：聚焦换能器、声透镜、相控阵聚焦系统。

Many ultrasonic treatment systems produced by The Chongqing HIFU Company are acoustic lens focus system.

重庆海扶公司生产的许多超声治疗系统，都采用的是声透镜聚焦系统。

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。