VOICE EVACUATION SYSTEM
Voice evacuation systems have become popular in most countries. Voice evacuation alarms typically are not as loud as horns or bells and usually sound an alarm tone and a voice message warning that an emergency has been reported and to evacuate the building (often also directing occupants to not use elevators). Voice evacuation systems can also be used by personnel to give specific live information and/or instructions over the alarm system using a built-in microphone, which provides a distinct advantage over horns or bells.