ASC T-128 Siren off Constitution Ave in Norman OK. Recorded 6/18/11. I wasn’t sure if this siren was still working so I took a gamble and set up my tripod anyway. I found out very quickly that it was not operational, but I did capture the full 3 minute cycle of the distant Whelen WPS2810s. In my opinion, the Whelens are not very loud or unnerving at all. In fact when I am inside I can barely hear it, and I live less than a half mile from one. It is a shame that Norman has replaced all these beautiful sirens! This siren is not even that old! If anyone has any additional information on this siren, let me know!