The change in air pressure associated with a sonic boom is only a few pounds per square foot — about the same pressure change experienced riding an elevator down two or three floors.
和音爆有关的气压变化只有每平方英尺几磅——大约是坐电梯向下两到三层所感受到的气压变化。
2
The sharp release of pressure, after the buildup by the shock wave, is heard as the sonic boom.
冲击波累积之后压力的瞬间释放，就是人们听到的音爆。
3
It is the rate of change, the sudden onset of the pressure change, that makes the sonic boom audible.