Areas defined as requiring intelligibility are called Ads.

Areas defined as requiring intelligibility are called Ads.

• A. Zones
• B. Rooms
• C. Outdoor spaces
• D. Ads

Answer: (D)

In fire alarm design, some spaces must carry messages that occupants can hear and understand clearly. Those areas are designated as Ads—areas requiring intelligibility. That designation signals that the system should prioritize clear, understandable voice announcements or alarms in those zones, guiding speaker placement, volume, and noise control to meet intelligibility standards. Zones, rooms, and outdoor spaces are just general location types and don’t specifically indicate a need for clearer messaging, which is why Ads is the best answer.

In fire alarm design, some spaces must carry messages that occupants can hear and understand clearly. Those areas are designated as Ads—areas requiring intelligibility. That designation signals that the system should prioritize clear, understandable voice announcements or alarms in those zones, guiding speaker placement, volume, and noise control to meet intelligibility standards. Zones, rooms, and outdoor spaces are just general location types and don’t specifically indicate a need for clearer messaging, which is why Ads is the best answer.