声波

The effects of several parameters of a digital ultrasonic borehole televiewer on system performance are analyzed, for example, those of the distance measuring error, the crack distinguishability, the side beam of the ultrasonic transducer and the wave propagation attenuation, The distance measuring error depends mainly on the accuracy of time measurement.

本文分析了数字井下超声电视系统中影响系统性能的几个主要参数，其中包括距离测量误差、系统的裂缝分辨力、超声换能器的副瓣影响以及声波的传播损耗等。

As early as 1927, the rocksy had converted the echo of seism to exhaustive section map of the earth's crust, according to which they spell one kind of 3D model which could open out the status of the oil storage on porous terrane, thus improve the probability of discovery and harvest of oil by 20％.

早在1927年，地质学家就将地震反射声波转换成地壳的详尽剖面图，并据此拼合成一种3维模型，它能揭示多孔岩层中的石油蕴藏状况，从而将石油的发现率和收获率提高20％。

It is an advanced technology. In all these methods,acoustic velocity thermometry based on the acoustic travel time is a better one with a wider use.

而在声学测温的各种方法中，基于声波传播时间的声速测温方法又是一种比较好的、应用更广泛的方法。

Low frequency sound waves (around 19 Hertz), which are below the threshold of hearing, have also been shown to precipitate a feeling of presence and the perception of shadowy images in the periphery of vision.

低频声波（约19赫兹）人耳听不到，但是也被证实可以让人产生一种有东西存在的感觉，并且在视力边缘感觉到有阴影。

Thus, we should consider the effect of the transverse perturbations.

因此我们的模型中考虑了弱横向扰动对尘埃声波的影响。

Besides fully functional earphones for use with the Soundwave MP3 player, these magic earphones can also transform into the troublemaking robots – Frenzy and Rumbles.

除了功能齐全的耳机一起使用声波MP3播放器，这些神奇的耳机也可以转化为参与滋事的机器人-狂热和r umbles。

The nature of the wave motion in sound can be made clear by considering the tuning fork.

对于音叉的考查可以使我们清楚地理解声波波动的本质。

Tympanic membranes - A thin membrane that receives and transmits the vibrations of sound waves to the nervous system for interpretation.

鼓膜膜 -一种薄膜接收和传输声波振动的神经系统的解释。

The structure of batscochlea is partly resembled withother mammals; meanwhile, there are some specilized aspects, which are considered asmorphologic adaptation to dealing with ultra-high frequency sound wave.

蝙蝠的耳蜗结构在部分相似于其它哺乳类动物的同时，也有部分特化现象的存在，这些特征都被认为是处理超高频声波的形态学适应。

Ultrasound:Use of ultrasonic wave s to produce images of body structures.

超音检查：利用高频声波在人体深部结构产生影像的技术。

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。