It's a drill if you look toward the end of the video when he's walking passed the Atrium the description says security was there and it was a routine drill
Could also be the emergency exit door alarms Tornadofreak1994 has both a system inspection and an actual event where the fire alarm goes off in his town's public library and the door alarms make that same noise. Safetech also has a video where he's inspecting a library with a Simplex voice evacuation system that has those same door alarms.
Did someone pull it or is it a drill if it's a drill that's one incredibly long drill
It's a drill if you look toward the end of the video when he's walking passed the Atrium the description says security was there and it was a routine drill
The continues horn is a First generation Gentex SHG
Could also be the emergency exit door alarms Tornadofreak1994 has both a system inspection and an actual event where the fire alarm goes off in his town's public library and the door alarms make that same noise. Safetech also has a video where he's inspecting a library with a Simplex voice evacuation system that has those same door alarms.