Here is a video of this month's siren test. I recorded it from the same area as last month's recording. It seems that Detroit hasn't exactly figured out what signals they wanted to test: the Thunderbolt 1000T went in like four minutes of alert, while the 2001s and Thunderbolt 1000s did 1.5 min alert and 1.5 min of attack. Also the Thunderbolt 1000 started a bit later than the 2001s. I'm guessing an activation signal delay. Anyways, I thought this was a good test. You can hear Redford's thunderbolt 1000 in the beginning of the video. Sorry for the random talking in the middle of the video. That was my grandaddy.
Here is the link: http://www.youtube.com/watch?v=WvwIZMBqxO8