Double frequency wave distortion has been found in the experiment.

实验上观察到了倍频失真。

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Experiments of rock fracture verified that strong low frequency wave could be received both on the surface of rocks and in the air before the main fracture.

岩石破裂实验证实主破裂前在岩石表面和空气中均收到较强的低频波。

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The bridge was actuated by sinusoid sweeping frequency wave, and then the power spectral density differences between the undamaged and damaged bridge were analyzed.

利用正弦扫频波激振钢桥，分析其损伤前后加速度反应功率谱密度的变化。

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So, if something cycles through five wavelengths in a single second, we would just say that the frequency of that wave is five per second.

如果一个东西在一秒,内经历了五个波长，我们就说这个波的,频率是每秒5次。

麻省理工公开课 - 化学原理课程节选

Alright. So, since we have these terms defined, we know the frequency and the wavelength, it turns out we can also think about the speed of the wave, and specifically of a light wave, and speed and is just equal to the distance that's traveled divided by the time the elapsed.

好了，我们已经定义了，这些术语，我们知道了，频率和波长，现在可以来考虑,波的速度了，特别是光波的速度，速度等于它走过的距离,除以所用的时间，因为我们。

麻省理工公开课 - 化学原理课程节选

This development is made possible by a new wave of technology: radio-frequency ID chips the size of pepper grains, broadband wireless and Web-based "dashboards" enabling monitoring and management.

FORBES: Your Product's a Hit

Using millimeter wave technology, which the TSA says emits 10, 000 times less radio frequency than a cell phone, the machine scans a traveler and a robotic image is generated that allows security personnel to detect potential threats -- and, some fear, more -- beneath a person's clothes.

CNN: Airport security bares all, or does it?