The movement of vibrating objects creates pressure variations in the medium, leading to the propagation of sound waves.

Sound propagation can be visualized as the propagation of density or pressure variations in the medium.

Pressure is related to the density of particles in a medium. More density results in higher pressure, and vice versa.

Compression refers to the region of high pressure, while rarefaction refers to the region of low pressure.

The rapid movement of the object creates compressions and rarefactions in the air.