A method for measuring acoustic field of electromagnetic ultrasound is introduced.

The higher the acoustic frequency is, the stronger its directivity is.

而且所有声频均有指向性,声频愈高, 指向性愈强.

Hot firings show that the frequency of the oscillating shock is close to the acoustic frequency.

热试结果表明,振荡激波的频率与声频相近.

Four parts are included : acoustic lens, mechanics I electronic circuitsand microcomputer system.

声显微镜由声镜、机械部件 、 电路和微机软硬件组成.

The acoustic material is an effective measure which could reduce noise and improve acoustic environment.

声学材料是降低噪声,改善声环境的有效措施.

Acoustic measurement was conducted to examine the development of acoustic features in Putonghua-speaking children.

声学测量用于考察讲普通话儿童的声学特征的发展.

Method Retrospectively summarized the postoperative ICU monitoring and nursing experience of 46 cases acoustic neuroma.

方法回顾性总结了46例听神经瘤手术后病人的ICU监护体会.

To evaluate the application of endoscope in acoustic neuroma resection in internal auditory canal ( IAC ).

目的探讨内镜技术在切除内耳道 ( IAC ) 内听神经鞘瘤术中的价值.

Results All the 20 patients with facial nerve neuroma or acoustic neuroma were evaluated by anatomy.

结果20例面、神经瘤均能从解剖部位加以鉴别.

Objective : To summarize and analysis the skills of facial nerve reservation in large acoustic neuroma surgery.

目的: 探讨和分析巨大听神经瘤手术面神经保留技术.

This will be deafening sound acoustic power.

这声音将震耳欲聋,铿锵有力.

An audio ( sound ) 　 wave is a one-dimensional acoustic ( pressure ) wave.

声波是一 维 的声学 ( 气压 ) 波.

The output current is operated at low-frequency square to prevent the acoustic resonance for MH lamps.

负载侧输出为低频方波电流,有效克服了MH灯声共振现象.

Electronic ballast ultrahigh frequency ( UHF ) can avoid the intrinsic problem of acoustic resonance of HID lamps.

采用 超高频 电子镇流器能有效克服高强度气体放电灯所固有的声谐振问题.

When human tissue is irradiated by microwave pulses, there is thermo-acoustic signal due to heat expansion.

人体组织在微波脉冲的激励下, 会因热膨胀产生热超声信号.

And based on MSP 430 F 427 , multi-frequency underwater acoustic signal data collecting device is designed.

介绍了低功耗MSP430F427单片机,并基于该单片设计了一种多频水声信号数据采集器.

The core problem of this thesis is to study the different acoustic signal identification methods.

本论文的核心就是研究不同地声目标识别方法.

The acoustic velocity of a rock varies according to its elastic constants and density.

岩石的声波速度随其弹性常数和密度而变化.

The linear relationship between the nodularity and acoustic velocity has been accepted.

球墨铸铁的球化率随超声声速的线性变化关系已经被人们所认同.

A new passive and wireless Surface Acoustic Wave ( SAW ) sensor array is introduced.

介绍了一种新型的无源、无线声 表面波 传感系统.

Biot ( 1956 ) established a fundamental theory of acoustic wave propagation through a fluid saturated porous elastic medium.

1956年Biot提出流体饱和多孔介质声传播理论,奠定了该声学分支的理论基础.