Bell

The bell is a device placed on many walls at Gunn that plays a square wave tone at 659.255 Hz for 5 seconds and follows the bell schedule, including alternate schedules. Timothy Herchen once recorded the bell.

At the beginning of the 2022-2023 school year, the clocks were replaced with AtlasIED IPX (either IP-SDMF or IP-SDMF-72) speaker clocks. The units with an overlapping speaker and clock were replaced by the surface model, while the units with gray boxes containing separate areas for the clock and speaker had the analog clock removed and replaced with the slant model. The digital clocks in the P building and S building were replaced by the flush model, as the old clocks were also flush in the wall.

Glitches

On 9/27/2021 and 9/30/2021 (Monday and Thursday), the bell unexpectedly rang at 12:40, followed by a PA announcement at 12:45 saying the bell "that just rang" should be ignored. Additionally, on 9/27, there was a second unexpected bell at 12:55, with no announcement.

On 5/10/2022, the bell rang at 8:53AM instead of 8:52AM, then did not ring again until 12:20PM. Announcements were made on the PA system, and a number of "Test 1 2 3 test" announcements were made. The bell worked fine on 5/11, but on 5/12, it did not ring at either 8:52 or 9:00. A PA announcement was made around 9:02, followed by the bell ringing, and it worked after that.