ESA Certified Alarm Technician Practice Exam

Which type of glass break detectors monitor frequency and amplitude?

1. Single Frequency

2. Dual Frequency

3. Multi-Frequency

4. Standard Frequency

The correct answer is: Dual Frequency

Dual frequency glass break detectors are designed to monitor both the frequency and amplitude of sound waves generated when glass breaks. This type of detector often analyzes different frequencies to more accurately differentiate between the sound of breaking glass and other ambient noises or false triggers. By utilizing two distinct frequencies, the detector can improve its ability to identify the specific sound signatures associated with glass breakage, thus enhancing its reliability and reducing the likelihood of false alarms. Other types, such as single frequency, might only focus on one specific frequency, which limits their effectiveness in distinguishing glass break sounds from similar noises. Multi-frequency detectors, while capable of monitoring various frequencies, typically do not focus specifically on analyzing both frequency and amplitude in the same measuring manner that dual frequency does. Standard frequency detectors may not offer the same depth of analysis as dual frequency options, making them less effective in detecting glass break events accurately.