In multi-occupancy spaces, what synchronization requirement applies to notification appliances?

• A. Only audible devices must synchronize.
• B. Visual and audible notification devices in the same area must synchronize to operate in unison.
• C. Devices can operate independently.
• D. Visual devices only must synchronize.

Answer: (B)

Synchronization of notification appliances ensures a single, unified alarm signal for occupants. In multi-occupancy spaces, all notification devices in the same area—both visual devices (strobes) and audible devices (horns)—must be synchronized to operate in unison. This guarantees that people simultaneously see the alert and hear it, improving comprehension and evacuation timing. Devices in different areas don’t have to be synchronized with each other; the requirement is focused on the devices within the same area. Visual-only or audible-only synchronization wouldn’t meet the standard because both cue types need to be coordinated to provide a complete, simultaneous alert. Allowing independent operation could lead to staggered signals and confusion during an alarm.