Passive damping is a technique used to reduce vibrations in structures and mechanical systems. It involves the use of materials or devices that absorb energy from vibrations without requiring an external power source. Common examples include rubber pads, springs, and viscoelastic materials, which help to dissipate energy and minimize oscillations. This method is often employed in engineering applications, such as in buildings, bridges, and vehicles, to enhance stability and comfort. By incorporating passive damping systems, designers can improve the longevity and safety of structures while reducing noise and discomfort caused by vibrations.