As mentioned in our last post, per NFPA 72 Chap. 18.4.6, the sound level of in-unit alarm notification in sleeping areas has to be either 15 dB over ambient, 5 dB over the highest measured sound level having a duration of at least 60 seconds or 75 dB at the pillow, whichever is greater. 75 [Read More]
You are here: Home / Archives for Low Frequency Requirements
When Are Low Frequency Sounders Required?
Filed Under: Audibility, City of Chicago Articles, Code Requirements, Fire Alarm Design, Fire Alarm Testing Requirements, Installation Requirements, Life Safety Articles, Notification Requirements, Uncategorized Tagged With: Fire Alarm Sleeping Area Requirements, Low Frequency Requirements, Low Frequency Sounders, NFPA 72 Sleeping Area Requirements, Sleeping Area Audibility Requirements, Sleeping Area Sound Requirements
Follow Us!