The Siren Board

Giving a visual to this, here are the coverage maps. Below are some before and after pictures comparing the 2001s to the E-Classes.

Wow, that is absolutely dismal. I live on roughly 107th street almost due south of the 103rd and Kostner siren and I cannot understand the voice when outside during a test. And I am located within the coverage ring. The 2001, which was in the exact same spot, could wake me up. Sad, this is what happened.

Brendan Ahern wrote:Wow, that is absolutely dismal. I live on roughly 107th street almost due south of the 103rd and Kostner siren and I cannot understand the voice when outside during a test. And I am located within the coverage ring. The 2001, which was in the exact same spot, could wake me up. Sad, this is what happened.

Yes you are. Near the edge of it though. The 2001 at Memorial Park in Chicago Ridge is actually closer to you than the E-Class, only by about 1/10 of a mile give or take. I guess that southern E-Class did some good by covering those subdivisions, however an Eclipse would have been PERFECT to fill that coverage gap.

There is no 2001 in memorial park. It is an E-Class. Chicago Ridges sirens are at fire stations. The E-Class on 103rd at the fire house is the closest to me. Between Cicero and Pulaski. The one on 111th was necessary, but if they stuck with Federal, an Eclipse would have done the job, or they could have moved the 2001 at memorial park to that location and still had coverage. Not sure what will happen because of this, but I really hope this gets fixed somehow. Without costing the village more money. They bought a system that does not work the way they said it would.

Brendan Ahern wrote:There is no 2001 in memorial park. It is an E-Class. Chicago Ridges sirens are at fire stations. The E-Class on 103rd at the fire house is the closest to me. Between Cicero and Pulaski. The one on 111th was necessary, but if they stuck with Federal, an Eclipse would have done the job, or they could have moved the 2001 at memorial park to that location and still had coverage. Not sure what will happen because of this, but I really hope this gets fixed somehow. Without costing the village more money. They bought a system that does not work the way they said it would.

Well that's embarrassing. I'm looking in a totally different area. If you're near 107th and Kostner then yes, that E-Class is the closest siren to you. (Give or take 1/2 mile) I guess I got confused with 2 E-Classes being off of 103rd, both at FDs. My bad.

Thanks for sharing your map, Tyler!

Did Oak Lawn just throw darts at a map on the wall and put E-Classes at the first 6 spots hit?

Either ASC over exaggerated the E-Class' power or Oak Lawn didn't bother doing a usage study. Those coverage gaps are inexplicable.

I believe ASC picked the locations. 3 of them had 2001's before. 2 were moved, one is totally new.

Tyler, how did you come up with the coverage circles? Published db output? I believe these are rated at 126db@ 100ft

Brendan Ahern wrote:I believe ASC picked the locations. 3 of them had 2001's before. 2 were moved, one is totally new.

Tyler, how did you come up with the coverage circles? Published db output? I believe these are rated at 126db@ 100ft

LaPorte county, IN gave theirs roughly 7/10 mile range. I figured that seemed reasonable for the 8 speaker model. I think I remember reading somewhere that ASC claims 1.2 miles on these. No way that's true.

They actually made the news on this one...some good shots of a couple of the new sirens and the control head end of it. Interesting stuff to actually see. Not sure how they are going to implement a siren like sound, whether they will use an ASC tone, or a recording of a siren similar to what San Francisco did. But it looks like they are dropping the voice messages entirely.

http://www.nbcchicago.com/news/local/Oa ... 41061.html

After reading this one, it looks like they also want to install 2 more sirens.

http://chicago.cbslocal.com/2013/11/21/ ... ng-storms/