Eli5 what is the force behind a sonic boom?

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I know it comes from breaking the sound barrier, but why a boom instead of complete silence?
I have the understanding it creates a physical wave too.
Bonus questions: Does the pilot hear it?

Can the same thing be achieved underwater?

Related: I know the speed of sound is faster under water, does any reaction happen theoretically at the air speed of sound underwater?

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13 Answers

Anonymous 0 Comments

the force??? isn’t something traveling past the speed of sound relative to air enough force to convince you? lol

Anonymous 0 Comments

This is funny, because I’ve been reading and looking a bit into Cherenkov radiation and how that’s essentially a photonic boom, which sounds impossible: nothing can travel faster than light, right? Well, when light travels through a medium, like water, it’s substantially slowed. Turns out that some particles can travel faster than light can in water. That creates a photonic boom. Here’s a helpful gif that illustrates the effect. When you hear a sonic boom, what you’re hearing is that diagonal line—all the circles of sound colliding with one another. https://en.wikipedia.org/wiki/File:Cherenkov_radiation-animation.gif

Anonymous 0 Comments

Can the pilot hear the boom or is he always I front of it?
If someone were to be able to sit on the back end of the plane or held ina basket a distance behind it ) like towing a car) would the boom be constant?