A System Using Inaudible Sound Waves to Detect the Presence

question 565

Multiple Choice

A system using inaudible sound waves to detect the presence of an intruder or other disturbance is known as a(n) :

• A) Motion detection system
• B) Ultrasonic motion detection system
• C) Sonic motion detection system
• D) Vibration detection system
• E) None of the above

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