Fire Alarm System 05
Fire Alarm System 05 : Notification Appliances: Notification Appliances utilize audible, visible, tactile, textual or even olfactory stimuli (odorizer) to alert the occupants of the need to evacuate or take action in the event of fire or other emergency. Evacuation signals may consist of simple appliances that transmit uncoded information, coded appliances that transmit a predetermined pattern, and or appliances that transmit audible and visible textual information such as live or pre-recorded instructions, and illuminated message displays. In the United States, fire alarm evacuation signals generally consist of a standardized audible tone, with visual notification in all public and common use areas. Emergency signals are intended to be distinct and understandable to avoid confusion with other signals. Temporal Code 3 is the most common audible in a modern system. . It goes beep 3 times over 3 seconds and stops for 1 second then does it again. Voice Evacuation is the second most common audible in a modern system. Continuous is not common in a new building or old building with modern system, but is found in lots of schools and older buildings. Other methods include: Audible textual appliances, which are employed as part of a fire alarm system that includes Emergency Voice Alarm Communications (EVAC) capabilities. High reliability speakers are used to notify the occupants of the need for action in connection with a fire or other emergency. These speakers are employed in large facilities where general undirected evacuation is considered impracticable or undesirable. The signals from the speakers are used to direct the occupant's response. The system may be controlled from one or more locations within the building known as Fire Wardens Stations, or from a single location designated as the building Fire Command Center. Speakers are automatically actuated by the fire alarm system in a fire event, and following a pre-alert tone, selected groups of speakers may transmit one or more prerecorded messages directing the occupants to safety. These messages may be repeated in one or more languages. Trained personnel activating and speaking into a dedicated microphone can suppress the replay of automated messages in order to initiate or relay real time voice instructions
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