detection unit sound

例句：

1. 1. The detection unit is responsiblefor detecting the presence of a targetobject.
   检测单元负责探测目标物体的存在。
2. 2.The sound of the detector unit was faint, barely audible.
   探测器单元的声音很微弱，几乎听不见。
3. 3. The soundof the alarm was so loud that itwoke up everyone in the room.
   警报声太响了，把房间里的人都吵醒了。