NCIDQ IDFX Practice Exam

Which detectors would typically listen for unusual sounds in a protected area?

1. Infrared detectors

2. Microwave detectors

3. Audio detectors

4. Pressure sensors

The correct answer is: Audio detectors

Audio detectors are specifically designed to listen for unusual sounds in a protected area, making them the most suitable choice for this question. They can pick up sounds that may indicate unauthorized activity, such as breaking glass or footsteps, and alert security systems accordingly. This capability enables them to serve as a proactive security measure, complementing other forms of detection. Infrared detectors are focused on detecting heat emitted by objects, such as human beings or animals, and do not analyze sound. Microwave detectors, while capable of sensing movement through the interruption of microwave signals, also do not listen for sound. Pressure sensors are designed to detect changes in pressure, typically used in applications like detecting the weight or presence of items on a surface, rather than monitoring audio activity. Thus, audio detectors stand out distinctly for their role in sound surveillance.