SSCP · Question #186
What is a common problem when using vibration detection devices for perimeter control?
The correct answer is A. They are vulnerable to non-adversarial disturbances. Vibration detection devices (e.g., geophone cables or fence sensors) detect physical disturbances transmitted through the ground or a structure. Their most common operational problem is a high false alarm rate caused by non-adversarial sources of vibration: passing vehicles…
Question
Options
- AThey are vulnerable to non-adversarial disturbances.
- BThey can be defeated by electronic means.
- CSignal amplitude is affected by weather conditions.
- DThey must be buried below the frost line.
How the community answered
(41 responses)- A93% (38)
- B2% (1)
- D5% (2)
Explanation
Vibration detection devices (e.g., geophone cables or fence sensors) detect physical disturbances transmitted through the ground or a structure. Their most common operational problem is a high false alarm rate caused by non-adversarial sources of vibration: passing vehicles, animals, wind-blown debris, construction activity, thunder, or trains. Because they cannot distinguish between a person cutting a fence and a bird landing on it, they frequently generate nuisance alarms that can desensitize operators (alarm fatigue). While weather can affect signal quality, the primary documented problem in perimeter security literature is false alarms from environmental, non-threatening disturbances.
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