A fire alarm notification appliance is an active fire protection component. A notification appliance may use audible, visible, or other stimuli to alert the occupants of a fire or other emergency condition requiring action. Audible appliances have been in use longer than any other method of notification. Most of today's appliances produce sound pressure levels between 45 and 120 decibels at ten feet.
Read more about Fire Alarm Notification Appliance: Methods of Notification, Coding, Visual Signals, Voice Evacuation, Effectiveness
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