Which of the following alarm systems is recommended to detect intrusions through windows in a high-noise, occupied environment?

Question

Options

• AAcoustic sensor
• BMotion sensor
• CShock sensor
• DPhotoelectric sensor

• A
  3% (1)
• B
  10% (3)
• C
  83% (24)
• D
  3% (1)

Explanation

Shock sensors are the ideal choice for window intrusion detection in high-noise, occupied environments because they detect the physical vibration or impact caused by breaking or forcing a window, rather than relying on sound or movement. This makes them highly targeted and resistant to false alarms from ambient noise or the normal activity of people in the space.

Why the distractors are wrong:

• Acoustic sensors (A) detect sound and would generate constant false alarms in a high-noise environment, making them unreliable.
• Motion sensors (B) detect movement within a space, meaning occupants moving around would continuously trigger them - they're not suited for occupied environments.
• Photoelectric sensors (D) use light beams to detect when a beam is broken, and while useful in some settings, they are not specifically designed for window intrusion and don't address the noise-environment challenge.

Memory tip: Think of shock sensors as "contact specialists" - they only react to a physical disturbance at the window itself, ignoring everything else happening around them. Remember: Shock = Specific to the surface, perfect for noisy, busy spaces.

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