This was the last recording of October 4th that I took after racing down to Decatur from Oak Ridge, TN. This siren is located at Glenwood Elementary School and tests on the first Wednesday at 5:00. The system in Decatur is comprised of 4 Whelen Vortex R4s and was installed in 2009. In addition to this, there is a Whelen WPS-2902 at Agnes Scott which can be activated by the city of Decatur, however I am unsure of when it tests. This siren actually surprised me because it was quite loud, I could actually feel it in my chest. If you are ever in the area on test day, I highly suggest that you record one of these sirens. Here is the video:
https://www.youtube.com/watch?v=eq6b5mxaYwM