Methods of Notification
The primary function of the notification appliance is to alert persons at risk. Several methods are used and documented in industry specifications published by UL.
Alerting methods include:
- Sound (audible signals)
- usually around 3200 Hz due to component constraints
- 45dB to 120dB A weighted for human hearing
- Light (visible signals)
- 15 cd to 1000 cd candela output
- 1 to 2 flashes per second
Read more about this topic: Fire Alarm Notification Appliance
Famous quotes containing the words methods of and/or methods:
“If you want to know the taste of a pear, you must change the pear by eating it yourself.... If you want to know the theory and methods of revolution, you must take part in revolution. All genuine knowledge originates in direct experience.”
—Mao Zedong (1893–1976)
“Commerce is unexpectedly confident and serene, alert, adventurous, and unwearied. It is very natural in its methods withal, far more so than many fantastic enterprises and sentimental experiments, and hence its singular success.”
—Henry David Thoreau (1817–1862)