Here's why:

* Vibrations cause disturbances: When an object vibrates, it displaces the particles in the surrounding medium. This displacement creates a disturbance in the medium.

* Disturbances propagate: The disturbance doesn't stay in one place. It spreads out from the vibrating object as a wave.

* Waves transfer energy: The wave doesn't carry the material itself, but it does carry energy through the medium.

There are two main types of waves produced by vibrating objects in a material medium:

* Mechanical waves: These require a medium to travel through (like sound waves in air).

* Electromagnetic waves: These don't require a medium and can travel through a vacuum (like light waves).

In summary: Vibrating objects create disturbances in material media, and these disturbances propagate as waves, transferring energy through the medium.