声波

The influence of acoustic perturbation on the pressure oscillation of a premixed conical flame combustor is experimentally investigated.

研究表明，V形预混火焰的锋面皱褶的频率与声波扰动的频率相同，其幅值与声波扰动的频率成反比。

Based on the measurement results, the elastic modulus and the longitudinal wave velocity of diabase and argillaceous limestone are organized and regressed to calculate their correlation.

百色水利枢纽消力池的工程地质条件复杂，在施工详图设计阶段对其进行专门勘察时做了大量的钻孔变形参数测试和声波测试，利用钻孔变形参数测试和声波测试结果，对辉绿岩、泥质灰岩的弹性模量和纵波速度进行整理、回归，求出其相关性。

Ultrasound is sound that has a frequency above the audible range of man that is greater than 20 kHz.

超声是一种声波，在医学影象中，超声仪使用2MHz-10MHz间的声波，此一频率已远远超过人耳所能听到的20kHz。

A mathematic model was established and applied to prediction of drillability in parallel direction to the bedding plane of formation by using drillability in perpendicular direction to the bedding plane of formation.

根据声波在横观各向同性介质中的传播规律，建立了利用测井资料反演岩石的各向异性参数进而求取垂直于层面声波波速的方法。

Thus this belt sander has its limitation in practical use.

不过，对测定目标物距离来说，声波运行的速度太慢，因此，声波回声测距法在实用中有其局限性。

In this thesis, sound wave path equation is derived from Fermat's theorem and the calculus of variations, and then the temperature field is reconstructed by the combination least-square method and the modified sound wave path.

本文通过求解由费马定理和变积分原理确定的声波路径方程，结合最小二乘法实现了声波路径的修正。

We come to the conclusionthat the physical wavelet is the conjugate of the wavelet operator group.

我们还以声波为例，给出了几种不同参数下声波的共轭小波算子族的图形。

Vibrating objects create sound waves. When you speak into one of the cups, your vocal chords vibrate to create sound waves. Sound waves are compression waves , which means they move by the compression of a fluid.

震动的物体会产生声波，当你对著杯子说话时，你的声带震动产生了声波，声波是一种压力波，这表示它们随著流体的压力而传播。

The batteries on the "pingers," little electronic noisemakers stuck to the sides of the flight data recorder and the cockpit voice recorder, will start to wear down in about three weeks, and slowly fade to silence.

在装有飞行数据和驾驶仓对话录音的黑盒子两侧存在一个声波发射器，但是声波发射器上的电池将会在3周后减弱，直至声波发射器慢慢降到无声。

Concrete components have flaws, such as loose, hole, slit band and so on. These flaws not only lead to the change of acoustic velocity, but also have strong absorption and attenuation action to the acoustic wave. It is an effective method to detect engineering quality of concrete components by using acoustic velocity CT and attenuation CT combined detection technology.

混凝土构件中存在的诸如松散、空洞、缝隙夹层等缺陷，不仅造成声波速度的变化，而且对声波具有较强的吸收衰减作用，利用声波速度CT和衰减CT联合检测技术是检测混凝土构件工程质量的有效方法。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。