A mechanical wave is a wave that is produced by the physical movement of matter.
- Transverse waves can be defined as waves in which particles vibrate perpendicular to the direction of propagation of waves, while particles vibrate parallel to the direction of propagation in longitudinal waves.
- Compressional waves, also called longitudinal waves, can be defined as the mechanical waves in which the matter particles vibrate parallel to the wave propagation direction.
Sound waves are a type of longitudinal wave, while water waves are a type of transverse wave.