In my old school, parts of the fire alarm were quite antiquated in some buildings. The older buildings had buzzers as sounders. They were very loud. The front of them was a red grid, and behind you could see some form of strip that presumably vibrated. You could hear them as loudly on the other side of the wooden walls. These made you want to leave the building quickly. The newer buildings had more modern sirens.
Are these old buzzers still made? Or are they obselete now sirens are almost universally used. Where would these be used if still made?
Are these old buzzers still made? Or are they obselete now sirens are almost universally used. Where would these be used if still made?