acoustic resonance

Preliminary research of chicken egg crack detection based on acoustic resonance analysis

敲击振动检测鸡蛋裂纹的初步研究

The research on measurement of pipe length by means of acoustic resonance

利用声共振测量管件长度的研究

The main methods are also put forward to handle acoustic resonance with electronic ballast .

并分析总结了电子镇流器解决声共振问题的方法。

Effects of Axial Magnetic Field on Acoustic Resonance of Low Power Metal Halide Lamp

纵向磁场对小功率金属卤化物灯声共振的影响

Study of Spread Spectrum in Suppressing Acoustic Resonance

频谱分散抑制气体放电中声谐振技术研究

Application of Frequency Modulation in Suppressing Acoustic Resonance

频率调制在抑制声谐振中的应用

Eliminating acoustic resonance in metal halide lamps based on saber simulation

基于Saber仿真消除金卤灯声共振问题研究

Real-ear measurement of ear canal acoustic resonance on Chinese children

中国幼儿外耳道声学共振特性的真耳测量

The electronic ballasts that drive light sources , must be high efficient and can prevent acoustic resonance .

新型、节能、高效的光源需要高效率的电子镇流器来驱动，同时所设计的电子镇流器又能够避免声谐振现象的产生。

In the design of supersonic wave treatment equipments , the key factor to output efficiency is the acoustic resonance frequency tracking technology .

在超声波治疗仪的设计中，声学系统谐振频率自动跟踪技术是保证输出效率的关键因素。

Applying axial magnetic field on low power metal halide lamps , its effects on acoustic resonance were observed experimentally .

本文对纵向磁场作用下小功率金属卤化物灯电弧声共振现象进行了实验研究。

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。

Design of a New Type Dimming Fluorescent Ballast ; Novel Dimmable UHF Electronic Ballast without Acoustic Resonance

新型可调光荧光灯电子镇流器的设计一种新型可调光无声谐振超高频电子镇流器

And a analysis of several methods solving the problem of acoustic resonance is presented , with an emphasis of the low frequency square wave method .

分析了解决HID气体灯声共振问题的不同方法的特点，重点对低频方波电子镇流器进行介绍；

Effect on the noise of centrifugal blower of the acoustic resonance cavity worm tongue with perforation board of various thickness

声学共振腔式蜗舌穿孔板厚度对离心式风机噪声的影响

Three main research aspects for the electronic ballast : Suppression of acoustic resonance , Dimming , and Start-up control are summarized respectively .

在此基础上对目前高强度气体放电灯电子镇流器研究的三大研究热点：声谐振抑制技术、调光技术和启动技术进行了归纳和总结。在此基础上提出了本文的主要工作。

Novel Dimmable UHF Electronic Ballast without Acoustic Resonance On the supersonic impinging jet by Laser Doppler Velocimetry

一种新型可调光无声谐振超高频电子镇流器激光多普勒测速方法研究超声速冲击射流

Low-frequency square-wave driving mode is the most effective method to eliminate acoustic resonance in low power metal halide lamp electronic ballast at present .

低频方波驱动模式是目前小功率金属卤化物灯电子镇流器抑制声谐振最有效的方法。

A Highly Sensitive Doppler Limited Photoacoustic Overtone Spectrometer with a Ti : sapphire Ring Laser & Optical Multipass and Acoustic Resonance

高灵敏高分辨钛宝石激光光声光谱仪&光学长程+声学共振

Acoustic resonance is due to the formation of the gas pressure wave created by standing wave . Plasma theory is introduced to explain the formative process of acoustic resonance .

声共振现象是由于气体的压力波形成驻波造成的，本文用等离子体理论分析了声共振现象形成的过程。

The acoustic resonance spectroscopy ( ARS ), which is a fundamental , promising and not very mature measurement , is used to measure acoustic velocity of sea water .

共振声谱法是测量海水声速的一种基本的、不太成熟且具有发展前景的测量方法。

While the lamp is running in the steady-state , it can also make the lamp work at a low frequency square wave voltage and current a voiding acoustic resonance .

在稳态时可以使灯工作于低频叠加高频的方波电压，从而避免了声谐振的发生。

There are acoustic resonance phenomena in HID lamps when driven at high frequency , which prohibits the developments of electronic ballast of HID lamps .

高强度气体放电灯在高频工作时特有的声谐振现象大大阻碍了高强度气体放电灯电子镇流器的发展。

It is showed that the acoustic resonance phenomena would happen in high intensity discharge lamps working in high frequencies with appropriate exciting frequencies and enough energies at the same time .

研究表明，高强度气体放电灯高频工作且具备适当的激励频率和足够的能量时，会产生声谐振现象。

A new type of electronic ballast circuit was proposed to solve the problem of acoustic resonance which may occur in the electronic ballast for high-intensity discharge ( HID ) lamps .

为解决高强度放电（HID）灯采用电子整流器时可能出现的音频共振问题，提出了一种新型的电子整流器电路。

Metal Halide lamps have very serious acoustic resonance problems , the most widely used method to achieve free acoustic-resonance is low-frequency square-wave electronic ballast with an additional pulse igniter .

金卤灯因其声谐振现象比较严重，通常采用低频方波驱动来彻底消除声谐振，附加点火电路。

It is shown by experimental data and testing waves that the chaotic modulation can decrease efficiently the PWM harmonics , reduce the electromagnetic interference , and suppress the acoustic resonance in HID lamp .

测试波形和数据表明：混沌调制技术能有效减小PWM电路产生的谐波，降低了输入级电路产生的电磁干扰，抑制了输出级的声谐振现象。

In this paper , some research work has been made to acoustic resonance phenomenon as follows : 1 The mechanism of HID lamp is studied . HID lamp works in arc discharge status in steady state .

本文针对HID的声共振问题，主要做了如下的工作：1.对HID灯的发光机理进行了研究，在稳态下HID灯工作在弧光放电状态。

Thirdly , the thesis synthetically researches the realization scheme of electronic ballast used for MHL by the technical lays of basic topology , control strategy , method for free of acoustic resonance , ignition circuit .

然后，从金卤灯用电子镇流器的基本拓扑选择、控制策略、避免声谐振方法、点火电路几个主要技术层面综合研究了金卤灯用电子镇流器的可行性方案。

And the resonant frequency and amplitude for cavity with samples differ from those for empty cavity obviously . Furthermore , the acoustic resonance spectroscopy of the small samples with different acoustic parameters differs from each other .

腔体中存在扰动体时的共振频率和幅度与空腔体中的共振频率和幅度之间存在比较明显的差别，并且声学参数不同的小扰动体之间的共振频率和幅度也各不相同。