audible indicator

例句：

1. 1. This device uses an auditory indicator to alert the user when it is time to turn off the lights.
   这个设备使用可听指示器来提醒用户何时关闭灯光。
2. 2. The doctor used an auditory indicator to guide the patient through the procedure.
   医生使用可听指示器指导患者完成手术过程。
3. 3. The alarm clock has an auditory indicator that vibrates when the time is up.
   闹钟具有可听指示器，当时间到了会振动提醒。