Oh boy!,
At my old apt bldg, 1 a interconnected siren/strobe box and 2 smoke detector w/strobe in my old unit.. When I was sleeping in the bedroom, and around 2 AM, the siren very LOUDLY in the kitchen sound like a police siren (interconnected from the central fire alarm system/pull boxes) woke me up grrrr! What the fuck?? and I checked on my tv to see the security channel 6, there is a firefighters rushed into the bldg..
I hate the fire alarm very freqently in old apt bldg! (some of deaf residents lives there, they're a public housing units).
Then after 11 years of old apt bldg, I moved into special housing for the handicapped residents, no false alarms and more quietly, oh! I was excited about fires damaged in the lobby next to the laundry in the special housing bldgs. I was puzzled the fire alarm went off, fire dept arrived in, and I go out to the "Emergency" ramp to 1st floor and hmmmm I saw the firefighter searched for smoke or fires... and finally they found a fires in the pop machine!!!!!! whoa! the firefighter hosed it down!
the next day later I asked the landlord, what wrong with the pop machine? she said it's a compressor and motor fires.