sound attenuator

例句：

1. 1. The engineer used a sound attenuator to reduce the noise level in the factory.
   工程师使用了一个声衰减器来降低工厂的噪音水平。
2. 2.The sound attenuator was designed to protect the hearing of workers in noisy environments.
   这个声衰减器被设计用来保护在嘈杂环境中工作的工人的听力。
3. 3. The sound attenuator was installed at the entrance of the building to prevent outside noise from entering.
   在建筑入口处安装了声衰减器，以防止外部噪音进入。