What exactly causes the BANG! sound in a gun?
In: Other
There are 2 or 3 separate things that make sounds when a gun fires. The first is the actual mechanical movement of the gun’s parts, although this is not very loud. The second is the sonic boom from the bullet as it leaves the barrel – many but not all bullets have supersonic muzzle velocities. The last and loudest part is the rapidly expanding gas. The bullet is propelled out of the gun by extremely high pressure hot gas. That gas follows the bullet out of the gun, and that extreme pressure wave becomes an extreme sound wave.
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