简述了低应变动测桩的频率理论，推导出了频率公式，得出了激励材质与频率、所测桩长之间的关系。

The frequency theory of law strain dynamic pipe measurement is sketched. The frequency formula is deduced out. The relationship between exciting material, frequency and length of piles is reached.

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此前乔瓦·尼巴。蒂斯塔·贝内代蒂(1530 - 1590)有相关的振动频率比和音调比之间的关系的理论。

Earlier Giovanni Battista Benedetti (1530-1590) had related the ratio of pitches to the ratio of the frequencies of vibrating objects.

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理论上，你可以极快地改变这些设备的频率，让敌人很难干扰或阻碍这些信号。

In theory, you could change the frequency of these devices quite rapidly, making the signals very hard for enemies to intercept or jam.

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