What 2 sounds make a bang?

A bang typically results from two sounds: the rapid compression and release of air, often caused by an explosive force, and the sharp impact noise produced when two objects collide with great force. In the case of a gunshot, for example, the initial explosive sound from the gunpowder igniting creates the bang, while the bullet breaking the sound barrier adds a secondary sonic boom. Together, these sounds create the characteristic sharp noise we associate with a bang.