查询词典 acoustic

Laser-generated surface acoustic waves are excited by Nd:YAG and the signals are detected by PVDF transducer. The paper discusses laser-generated surface acoustic waves in the smooth and non-laser shock peened medium by using the experimental system.

分别对不同激光冲击硬化次数下样品表面抛光前后的激光声表面波信号进行探测，通过对探测到的激光声表面波信号进行频谱分析，利用相位谱法得到激光声表面波的相速度色散曲线。

This may have been improved following the modernisation refits of the submarine in the late 1990s, which saw the surface of the submarine being covered with acoustic tiles to reduce the acoustic signature, and the introduction of the more advanced wire-guided anti-submarine torpedo and possibly submarine-launched YJ-8 anti-ship missile too.

这可能已经随着潜艇在1990年后期中的现代化改装中被改进，看到潜艇表面覆盖消声瓦减少声学特征，引进更先进的线导反潜鱼雷和也可能有潜射YJ-8反舰导弹。

Based on the above theories, some vibration characteristics of longitudinal acoustic horns are analyzed with finite element analysis software ANSYS. Some factors influence to large end amplitude distribution is studied such as big end diameter, length of horn, and diameter ratio of big end to small one. In addition, we carry on analysis and research to resonance frequency of large cross-section acoustic horn, amplitude magnification factor, wave node position of horn, transverse vibration situation and so on, and some related change rules are obtained.

在此基础上，通过有限元分析软件ANSYS对纵向超声变幅杆进行了振动特性分析，研究了变幅杆的大端直径、变幅杆长度、大小端面直径比对大端面振幅分布的影响，并对大截面变幅杆的谐振频率、振幅放大系数、变幅杆的波节点位置，横向振动分布等进行了分析研究，总结了相关的变化规律。

The analysis on the numerical simulation results of the azimuth characteristics of the acoustic field generated by the transmitter showed that the acoustic energy generated by the phased arc array transmitter could radiate onto the sidewall of oil well in a certain azimuth range.

对模拟声场的方位特征进行的分析表明：相控圆弧阵声波辐射器产生的声波能量基本向某一周向角范围的井壁入射，进入地层的声波在一定周向角范围内传播。

Electro-acoustic components for communications professionals and accessories factory, over the years you承蒙industry cooperation and Tixie, our products have covered the full range of electret condenser microphone, holding the first high-fidelity audio and microphone, all kinds of micro - Speakers and receiver, and the full range of hands-free stereo headset, Xiankong Qi, and other accessories, such as piezoelectric acoustic devices.

做为通讯电声元器件及配件的专业制造厂，多年来承蒙业内诸位的合作与提携，我们的产品已涵盖了全系列电容式驻极体麦克风、手持高保真音头和麦克风，各种微型喇叭及受话器，全系列立体声及免提耳机，线控器等配件、压电声学器件等。

A high speed high accuracy and multi-channel synchronous data acquisition system for array acoustic logging is designed, which can be used under downhole high temperature, the requirements for cross dipole simulation signal process for acoustic logging, the integration of acquisition circuit and method for its data processing are put forward.

设计了一种可工作于井下高温环境，用于阵列声波测井的高速高精度多通道同步数据采集系统，提出了声波测井对交叉偶极模拟信号的处理要求以及采集电路的构成和采集数据处理的方法。

The same position of each of the first plurality of acoustic drivers and the same position of each of the second plurality of acoustic drivers may be the center of the dust cap.

所述多个第一声学驱动器的每一个的相同位置和所述多个第二声学驱动器的每一个的相同位置可以是防尘罩的中心。

The major work is as follows: I make the comparing test to check up the two acoustic emission theory's fundamental hypothesis and get that merit and limit of two method, which is help to find the best applying area for two acoustic emission method.

主要完成的工作如下：通过对比试验来验证参数式声发射技术和模态式声发射技术的理论，分析两种声发射技术的优缺点，找到各自最佳的应用范围。

Kaneda, Gilbert - Though some expect an acoustic guitar wielding singer-songwriter to be a folkie, Gilbert Kaneda's tough as nine inch nails acoustic alternative rock defies such tired conventions.

以Kaneda吉尔伯特虽然有些预料挥舞木吉他歌手是folkie，吉尔伯特以Kaneda的强硬作为替代石九吋钉声厌倦这种蔑视公约。

Methods Measurement of voice signal was made using micro-computer and acoustic software during sustained phonation of vowel /a/ in 50 healthy subjects and 50 patients with benign vocal fold lesions.The harmonic waves,formants and noise of the sonogram were analysed. Results There were significant differences of acoustic characteristics between normal and pathologic groups.

采用&电子计算机声学测试系统&对50例正常成人及50例声带良性增生性疾病患者发持续元音/a/时的声音信号进行检测，分析元音语图谐波、共振峰及噪声成分特征及变化规律。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。