弱音器

例句：

1. 1. The engineer used a weak-sounding microphone to record the sound of the wind.
   工程师用一个听起来很弱的麦克风来录制风的声音。
2. 2. The car's engine is equipped with a weak-sounding muffler to reduce noise.
   这辆车的发动机配备了一个听起来很弱的消声器，以减少噪音。
3. 3. The scientist used a weak-sounding device to test the material's acoustic properties.
   科学家使用一个听起来很弱的设备来测试材料的声学性质。