An alarm system which sounds only in the building to notify the occupants is a:

• A. Zone Noncoded
• B. Proprietary Alarm
• C. Central Station
• D. Protected Premise Local Alarm

Answer: (D)

Audible alert scope defines who hears the alarm. An alarm that only sounds inside the building is meant to warn the occupants locally and trigger evacuation without contacting an external monitoring service. This is known as a protected premises local alarm. Central-station or proprietary systems involve off-site signaling or monitoring, and zone noncoded refers to how signals are organized rather than where the alert is heard. So the description fits a protected premises local alarm.