ESA Certified Alarm Technician Practice Exam

Which of the following is NOT a method of glass break detection?

1. Acoustic Detection

2. Contact Gap

3. Vibration Detection

4. Frequency Analysis

The correct answer is: Contact Gap

The correct identification of methods for glass break detection is essential in ensuring the effectiveness of security systems. Contact gap detection typically involves the use of sensors that create a magnetic field; when a door or window is opened, the circuit is broken, triggering an alarm. This method does not analyze the specific characteristics of glass breaking, which is the focus of glass break detection methods. In contrast, acoustic detection involves analyzing sound waves generated when glass breaks. Vibration detection monitors changes in vibration patterns that may indicate glass shattering. Frequency analysis examines the frequency of sounds produced during a glass break event to differentiate them from other noises. All these latter methods directly relate to glass break detection, while contact gap detection does not directly serve that purpose. This distinction highlights the unique nature of each method in the context of glass break detection applications within security systems.