AUDIO AND VISUAL NOTIFICATION DEVICES
Notification appliances are used to alert persons of the need to take action, usually to evacuate. The appliances include bells, horns, speakers, strobes, text displays or a combination of these devices. The audible and/or visual notification alert the occupants of a fire or other emergency condition requiring action.
Speaker. Transmits communication from the Fire command station. Announcements and instructions can be heard from speakers.