当波从小扰动源向各个方向均匀传播时，其强度的变化与距离的平方成反比。

When a wave travels uniformly in all directions from a small source, the intensity varies inversely as the square of the distance.

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速度升高到1.3马赫（速度单位，1马赫=音速=340.29m/s——译者注）以后，不会再对冲击波强度造成太大的影响。

Increasing speeds above Mach 1.3 results in only small changes in shock wave strength.

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山丘、河谷和其它地貌特征会造成多种冲击波的反射并影响其强度。

Hills, valleys and other terrain features can create multiple reflections of the shock waves and affect intensity.

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