Answer
When the sound of a sudden ‘bang' propagates through a medium the motion of the medium’s particles is parallel to the direction of wave propagation. Therefore, the wave nature of the sound of a sudden ‘bang' is longitudinal.
Work Step by Step
When the sound of a sudden ‘bang' propagates through a medium the motion of the medium’s particles is parallel to the direction of wave propagation. Therefore, the wave nature of the sound of a sudden ‘bang' is longitudinal.