.. if you want to put it that way.
They were the first fire alarms I ever heard in my life, when I was in kindergarten, in late 1993 or early 1994. A loud pulsing "BUZZZZZZ!!! ... BUZZZZZZ!!! ... BUZZZZZZ!!! ... BUZZZZZZ!!!" accompanied by flashing red lights (not strobes.) They were the second loudest fire alarms I've ever heard (tying with my middle school), only being beaten out by my high school's fire alarm system.
Early this year, the school had its' fire alarm system replaced, due to the old system failing (it even went off at 4 AM on one occasion!) So now, the old alarms are gone. They removed them, and installed new ones on adapter plates. They used System Sensor's SpectrAlert Advance series of horn/strobes, which I see at a NUMBER of places. My workplace has them. Some stores at the mall have them. Even my old college has them! In fact, some of the buildings at said college used to have the same kind of old Simplex alarms as this school did, and then they've since replaced them with those same System Sensor alarms. A pretty strange coincidence...

Even though they were not pleasant, I will miss the old fire alarms there very much. Now the kids there will instead get a high-pitched "BEEEEP! ... BEEEEP! ... BEEEEP! ...... BEEEEP! ... BEEEEP! ... BEEEEP" sound during fire drills. Not as good as the older horns.