Propagation of sound can be visualized as propagation of density variations or pressure variations in the medium. Comment.

Air is the most common medium through which sound travels. A vibrating object moves back and forth rapidly, a series of compression and rarefaction is created in the air. These make the sound wave that propagates through the medium. Compression is the region of high pressure and rarefaction is the region of low pressure. Pressure is related to the number of particles of a medium in a given volume. More density of the particles in the medium gives more pressure and vice versa. Thus, propagation of sound can be visualized as propagation of density variations or pressure variations in the medium