nfpa 72 2002 pdf

6 Voice evacuation in Europe edit In Europe, voice evacuation systems are normally a mandatory requirement for rail and air transport terminals, high-rise buildings, schools, hospitals, and other large facilities citation needed.
Voice systems for emergency use date back at least as far as the second world war.
A notification appliance may use audible, visible, or other stimuli to alert the occupants of a fire or other emergency condition requiring action.8 Under the testing conditions, a 520 Hz square wave T-3 sound woke up 92 of hard-of-hearing participants, making it the most effective.Effectiveness edit Initial research into the effectiveness of the various alerting methods is sparse.The pattern is uniform without regard to the sound used.Two separate studies were conducted one for the hard-of-hearing and one for the alcohol-impaired in order to compare the waking effectiveness of 520 Hz low frequency square wave devices and 3100 Hz pure tone T-3 sound devices.In the United States, the 1990 Americans with Disabilities Act (ADA) triggered changes in evacuation signaling methods to include the hearing impaired.A fire alarm notification appliance is an active fire protection component of a fire alarm system.This lizzie mcguire games dress up miranda is joined by the European harmonised equipment standards family EN 54, and ISO 7240-16:2007.5 Visual signals edit Wheelock RSS Strobe flashing during fire alarm system activation Older Simplex 4051 fire alarm signal on a 4050-80 incandescent light plate.Individuals in the hearing loss community are seeking changes to improved awakening methods.The use, design, operation and installation of Voice evacuation systems is governed in Europe by cenelec European Committee for Electrotechnical Standardization EN 60849 and in the UK by the British Standard BS 5839-Part 8, a system code of practice.European Siren for fire detection system.Citation needed, contents, methods of notification edit, the primary function of the notification appliance is to alert persons at risk.Audible notification appliances would now have to include strobe lights with higher brightness intensity to alert the hearing impaired.Today, strobe synchronization is often used to synchronize all strobes in a uniform flash pattern.
In general, no common standard at that time mandated any particular tone, or pattern for audible fire alarm evacuation signals.