What feature activates all audio/visual devices when a fire is detected?

The feature that activates all audio/visual devices when a fire is detected is the general alarm method. This method is designed to ensure that all alarm devices, including visual (like strobe lights) and audio (like sirens or horns), are engaged simultaneously in response to a fire detection. This comprehensive activation is crucial in emergency situations, as it ensures that every occupant in a building can receive immediate and consistent notification about the danger, facilitating a prompt evacuation.

The general alarm method operates automatically when any fire detection device, such as smoke or heat detectors, identifies a potential fire threat. Its broad activation range is particularly important in settings like homeless shelters, where vulnerable populations may need additional support and clarity during emergencies. In contrast, the local alarm method typically activates only specific alarms within a particular area, which may not be as effective in alerting individuals throughout the entire facility. The manual trigger option relies on personnel initiating the alarm, which can introduce delays. Remote control activation adds another layer of complexity that might not be reliable during urgent situations. Therefore, the general alarm method is the most effective and immediate response mechanism for ensuring safety in emergencies involving fire.