查询词典 acoustic

According to the acoustic admittance curve of stapedius,we wrote down the differential equation of the acoustic reflex dynamic system,and deduced the corresponding transfer function.

针对镫骨肌声反射的声导纳变化曲线，建立声反射动态系统的微分方程，进一步推导出相应的传递函数。

The tympanogram was A-type curves in the acoustic immitance test, and acoustic stapedius reflex was normal.

声导抗测试鼓室导抗图为A型，交叉和非交叉镫骨肌声反射均可引出。

Since the decrease of the acoustic stapedius reflex amplitude is mediated by the auditory efferent system in sound field, in clinical practice the function of the auditory efferents can be evaluated by testing the change of acoustic stapedius reflex amplitude with the stimulation of the wide band noise in sound field.

声场下白噪声刺激可致镫骨肌声反射幅值降低，临床上可以通过检测声场下白噪声刺激后镫骨肌声反射幅值的变化评枯听觉传出神经的功能。

So the paper thinks of aircraft sound source as motorial dot source to research the acoustic field around airport, and analyses the impact of the aircraft velocity against the acoustic field around airport stressfully.

论文首先将飞机声源作为运动点源，考查对机场周围声场的影响，并重点分析飞行速度对机场周围声场的影响。

Vector acoustic field is a very important part of sound wave, but the vector information of acoustic wave has been unwitnessed for a long time.

矢量声场时声波场的重要组成部分，但在相当长的一段时间内没有受到重视，声波的矢量信息却被忽略了。

After comparing nonlinear simulation with linear, the results indicate that: Weak nonlinearity has definite and apparent influence on the distribution of acoustic fields and focused gain of array, which cause the distribution of waveform is closer to the array and the focused gain deteriorate ; the strong nonlinearity have a strong waveform aberration, because the other waves of non-fundamental frequency appear . No evident distinction is found in the effects between the oblique propagation and the vertical propagation, though less focused gain and influence caused by strong nonlinear produced by the acoustic diffraction which results in more attenuation in terms of oblique propagation.

将线性条件下的模拟结果与非线性条件下的模拟结果进行比较发现：弱非线性会对声场的分布和阵列聚焦增益产生一定的影响，使得声场分布波形比线性条件下的更加靠近阵列，聚焦效果变差；强非线性会使波形发生更严重畸变，这是由于产生了基频以外的其他频率声波引起的；非线性对斜向传播时声场分布的影响与垂直传播时的影响效果基本相同，但由于斜向辐射时的声波衍射造成的衰减要大于垂直辐射时的，因此聚焦增益和强非线性的影响都将小于垂直辐射时的情况。

This can cause acoustic neuromas to grow on the acoustic nerves on both sides of the head.

这可能会导致听神经瘤的增长，对声波的神经两边的头部。

Methods:MRI of 138 acoustic neuromas in 135 cases proved by operation and pathology were analyzed,in which there were 10 small acoustic neuromas,42 cases were Gd-DTPA enhanced.

收集手术和病理证实的135例、138个听神经瘤的MRI，其中微小听神经瘤为10例，行Gd－DTPA增强扫描为42例。

Methods The MRI features along with pathologic findings of 35 patients with acoustic neuroma were analysed retrospectively.There were 3 small acoustic neuromas,30 cases were Gd DTPA enhanced.

通过手术病理对照，回顾分析了35例听神经瘤的MRI表现，其中微小听神经瘤为3例，行Gd DTPA增强扫描为30例。

The surface roughness of the laser shock peened medium has effect on the high frequency of laser-generated surface acoustic waves. As the impact times of the laser shock peening increase, the surface roughness has little effect on the dispersion of laser-generated surface acoustic waves. From the theoretical curve and experiment curve, it can ...

本文研究的结果，可对研究样品激光冲击硬化后残余应力、晶粒方向改变和错位密度增加分别对激光声表面波色散影响提供了基础，并对利用激光声表面波的色散特性来研究激光冲击硬化材料冲击层材料性质的变化具有一定的意义。

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在，'歼灭战perfuming自己与胡努特，那麼，他来到和SAT 。