CF-04-20- Public Operating Mode To ensure that audible public mode signals are clearly heard they shall have a sound level at least 15 dB above the average ambient sound level or 5 dB above the maximum sound level having a duration of at least 60 seconds, whichever is...
CF-04-19- Operating Modes Public Operating Mode Audible or visible signaling to occupants or inhabitants of the area protected by the fire alarm system Private Operating Mode Audible or visible signaling only to those persons directly concerned with the implementation...
CF-04-18- Average Ambient Sound Level *The suggested value of 85 dBA for mechanical rooms is only an example, as are all the other table entries. Some mechanical equipment rooms might have an average ambient sound level that exceeds this value, and others might be...
CF-04-16- Section 4-2-Audible Characteristics Distinctive Evacuation Signal To meet the requirements of Section 10.10 , the alarm audible signal pattern used to notify building occupants of the need to evacuate (leave the building) or relocate (from one area to...
