Which statement about the use of the built-in microphone in alarm systems is accurate?

• A. It records conversations for training only
• B. It can be used to provide specific information or instructions over the alarm system
• C. It identifies intruders by voice biometrics
• D. It only triggers loud siren sounds

Answer: (B)

The key idea is that the built-in microphone enables two-way audio communication through the alarm system. This allows the monitoring center or the system at the scene to speak to occupants or even address an intruder in real time, providing specific information, instructions, or requests during an alarm event. This direct voice channel helps verify events, guide responders, and potentially de-escalate situations by telling people what actions to take or whether it’s a monitored false alarm. It isn’t primarily for recording conversations for training, it isn’t typically used for identifying intruders by voice biometrics, and it isn’t limited to simply triggering sirens—the microphone’s real value is the live instructions and information it can convey during an incident.