* Medium: This is the material that the wave travels through. It could be a solid, liquid, or gas. The particles in the medium vibrate and transfer energy, allowing the wave to propagate.

* Source of Disturbance: This is what initiates the wave. It could be a vibrating object, a sudden impact, or any other event that disrupts the medium and sets the particles in motion.

Let me know if you would like more details about mechanical waves!