Passive anti-vibration systems are simpler and generally less expensive than active systems. They work by using materials with high damping properties to absorb vibrations. For example, rubber or viscoelastic materials can be placed under the equipment to minimize the transmission of vibrations. Another common approach is the use of spring-damper systems, which can absorb both low and high-frequency vibrations. These systems are effective in environments where the vibration sources are relatively constant and predictable.