What kind of wave are sound wave? Show graphical representation of a sound wave and mark the point of compression and refraction

Sound is transmitted through air, water and other object as longitudinal waves, also called compression waves. It requires a medium to propagate.

Longitudinal sound waves are waves of alternating pressure deviations from the equilibrium pressure, causing local regions of compression and rarefaction.






hope it helps out 

it is longitudinal.
in graphical representation, it is similar to transverse, the above one is compresion and below is rarefraction.