Most high-rise lodging applications and R-2 occupancies, such as hotels and college dormitories, require the use of voice systems to manage the evacuation of occupants. For the majority of the low frequency discussion, the product solutions in mind have been stand alone notification appliances.
What do you do when you are required to put a voice system in the sleeping space? Can you play an audio file that can comply with the low frequency requirement?
The answer is yes, but you have to ensure it is UL listed as compatible system to the low frequency requirements defined in UL 464.
Why is this required for fire alarm or ECS control panels since they come with a wide variety of pre-programmed sound files that do not require compatibility?
The answer can be found in the details of the low frequency requirements as defined per UL 464. Speakers are just passive devices; they just turn on or off depending on the activation of the system and operate listed frequency ranges. A sound file goes through processing as it goes through the amplifier and out of the speaker. UL requires verification that the signal coming out of the speaker complies with the low frequency performance requirements just as a standalone low frequency device.
Fire-Lite’s ECC-50/100 is now UL listed with select System Sensor Speakers and Speaker Strobes to produce the low frequency tones for Voice Evacuation or Emergency Communications. These messages can easily be downloaded to the Control panel with our Audio programming utility.
About the Author
Rebecca Peterson is a Sr. Product Marketing Manager for the AV business unit of System Sensor. Rebecca has been with System Sensor for 13 years and her primary focus on new product development and voice of the customer on products that customers need and want.