Why dosent compressions & rarefactions neutralised by surroundin air?
The phenomenon you are describing is basically took place in the air, and the compression & rarefaction produced by sound waves are returned to normal positions. Study carefully the properties of mechanical waves and it will became clear to you that the medium is not transferred during the transportation of mechanical waves, and the elasticity of air is least in the three forms of mediums i.e.solid, liquid & gas.
