What is the difference between fire alarm-only systems and voice evacuation (mass notification) systems?

• A. Fire alarm-only systems provide alert signals; voice evacuation systems deliver spoken instructions to guide occupants during evacuation.
• B. Fire alarm-only systems include voice messaging; voice evacuation is only sirens.
• C. Fire alarm-only systems require manual calling; voice evacuation is automatic.
• D. Fire alarm-only systems trigger sprinklers; voice evacuation activates alarms.

Answer: (A)

The main idea here is how occupants are communicated during an incident. Fire alarm-only systems focus on alert signals—sirens, bells, strobes—to warn everyone that something is wrong. They wake people and indicate that they should evacuate, but they don’t provide tailored, spoken instructions.

Voice evacuation systems add a public-address capability that can deliver spoken messages. These messages can direct people to specific exits, identify stair usage, coordinate zones or floors, and provide timing or safety guidance. In complex buildings, this helps guide a safer, more orderly evacuation rather than relying on alarm sounds alone.

Some options mix up features (like saying alarms include voice messaging or that voice systems are just sirens), but the defining difference is the addition of clear, spoken instructions in a voice evacuation setup.