Detonation is propagation of a combustion-driven shock wave at or above the speed of sound.

爆轰是一种以冲击波为特征，以超音速传播的爆炸。

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In this paper, the interaction between a cw plane wave and a plane pulse travelling with sound speed is considered. Both of them satisfy the homogeneous wave equation.

本文讨论一列平面波与一列平面行波脉冲的声相互作用，显然这两个波不仅都满足波动方程，而且可以用来讨论公共区之外的声散射声问题。

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The measurement of sound speed in the air is studied in the experiment by phase comparison method and standing wave method.

通过实验，应用相位比较法和驻波法对空气中的声速测量进行了研究。

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These waves travel at the speed of sound, but when a jet travels at Mach 1 and above these waves merge into one single shock wave as they cannot get out of the way of each other quickly enough.

CNN: Bang goes the sonic boom