Passive vibration control refers to techniques used to reduce unwanted vibrations in structures without the need for active intervention. This is often achieved through the use of materials or devices that absorb or dissipate energy, such as dampers, isolators, or mass-spring systems. These systems are designed to enhance stability and comfort in buildings, bridges, and vehicles. One common application of passive vibration control is in seismic protection for buildings, where specially designed components help to minimize the impact of earthquakes. By incorporating these systems, engineers can improve the resilience of structures, ensuring they withstand dynamic forces while maintaining safety and functionality.