Question

If air molecules are at random motion how sound can propagate

Answer 1

hey mate here is your answer

Since air molecules (the particles of the medium) are moving in a direction that is parallel to the direction that the wave moves, the sound wave is referred to as a longitudinal wave. The result of such longitudinal vibrations is the creation of compressions and rarefactions within the air.

Answer 2

Sound too travel in a random direction it means it will pass through all surrounding but with less intensity