damping to half amplitude

例句：

1. 1. The car's suspensionsystem is designed to dampen vibrations.
   汽车的悬挂系统设计用来减震。
2. 2. Theengineer used a damping device to reducenoise in the factory.
   工程师使用一种减震装置来减少工厂里的噪音。
3. 3. The damping effect of the material was tested undervarious conditions.
   这种材料的减震效果在各种条件下都进行了测试。