蝙蝠用超声波识别猎物发出的震动。

Bats use ultrasound to pick up vibrations from their prey.

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今朝常用的传感器首要有开关报警器、震动报警器、超声波、次声波报警器、红外报警器、微波报警器、激光报警器、烟感报警器和温度报警器等。

Now commonly used sensors are mainly switch alarm, vibration alarm, ultrasonic, infrared alarm device alarm, and microwave alarm, laser alarm, smoke alarm and temperature alarm and etc.

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