And that's the shockwave as that propagates down to the ground and it goes by your ears, you get that sudden change of pressure from that shockwave, and that sounds like a boom or an explosion.

这就是冲击波， 它向下传播到地面并经过你的耳朵，你会从冲击波中感受到压力的突然变化， 这听起来像是一声巨响或爆炸。