The Siren Board

I would think that getting T-128 endorsements from these fire chiefs around Hamilton county would help EMA see that they are about to make a blunder. Perhaps a petition would help. I would think a lot of signatures would be needed though.

Jpressman wrote this on another thread "Hamilton County Sirens"..........

Just called N. College Hill police department and authenticated the call. I'm not a big fan of reverse 911. So here is some proof that reverse 911 is a failure. The officer at dispatch told me that the report went out at 7:50 pm and the calls started to go out. The teen was found at 8:30pm then the call was canceled. Apparently the system is malfunctioning and the calls are still going out. The officer also told me that the call was issued to 2 area zip codes 45239 and 45251. No how is that supposed to work in a county of almost 1.5 to 2 million if it fails just 2 zip code areas. I received the call at 10:10 pm. Edit Add: I just found out that they have a Federal reverse 911 system. And it appears that it does'nt work very well.

Just heard that Wyane County is having problems with Federal sirens meeting the specified db rating and people cannot hear them. So the contractor who laid out the system said to buy more (I supose at an extra cost)

Several years ago when Sedalia, MO got their system of 2001s there were complaints of the sirens not being loud enough, according to some friends who literally have one at the end of their driveway (it replaced an STH-10) some workers came out an worked on it and tested it several times throughout the day and every test was noticeably louder.

Short of increasing the chopper voltage, what could they have been doing?

weasel2htm wrote:Several years ago when Sedalia, MO got their system of 2001s there were complaints of the sirens not being loud enough, according to some friends who literally have one at the end of their driveway (it replaced an STH-10) some workers came out an worked on it and tested it several times throughout the day and every test was noticeably louder.

Short of increasing the chopper voltage, what could they have been doing?

First thing that comes to mind is bad electrical connection from the batteries to the siren or bad batteries (DC model); or bad electrical connection to the siren from the power lines or transformer issues (if its an AC/DC or AC model).

uncommonsense wrote: First thing that comes to mind is bad electrical connection from the batteries to the siren or bad batteries (DC model); or bad electrical connection to the siren from the power lines or transformer issues (if its an AC/DC or AC model).

From what I understand, they were doing whatever it was to all the city sirens, all of which were brand new. I do know that the sirens have battery backup (one of the reasons for the new siren system)

I do think this kinda shows the lack of penetrating power of the 2001 series, some of the old siren locations were re-used, other 2001s were installed in new locations. The 2001s replaced (mostly); T-bolts, SD-10s and 2T22s, there were a few STH-10s and a thunderbeam (which replaced a 2T22) in the mix.

Come on guys this site is the premere site for knowledge of sirens. I am trying to find out two things.

1. What is the difference between the 2001SRNB and the 2001-130 to
boost the db up so much

2. Has the 2001-130 ever been tested and if so was it by ANSI S12.14
and where is the report.

I'm betting that there was no formal field tests of the 2001-130 and that is why the results are so hard to find. The only difference that I can tell between SRNB and the 130 is the box behind the projection horn. The SRNB is square and the 130 is larger and rectangular.

SIRENMAN wrote:Come on guys this site is the premere site for knowledge of sirens. I am trying to find out two things.

While that might be true, what is also true is that we're enthusiasts which doesn't automatically mean we have access to such information. It has to come out publicly, and if Federal are keeping their cards close to their chest, so be it.

Asking nicely might encourage a better response.

SIRENMAN wrote:What is the difference between the 2001SRNB and the 2001-130 to boost the db up so much

It has been speculated that the increase in sound pressure output is an increased rotor speed which leads to an increased suction force in the rotor, therefore more sound pressure to project. This has the side effect of increasing the pitch, which at a distance (depending on conditions) almost cancels out the increase in sound pressure output. It seems that this might be more a marketing gimmick than anything.

It could also be a redesigned rotor but there doesn't appear to be any updated patent documents covering this. The larger intake assembly directly behind the horn could be because a larger intake volume (or temporary air storage area) was required to facilitate the speed change, though this is only speculation.

SIRENMAN wrote:Has the 2001-130 ever been tested and if so was it by ANSI S12.14 and where is the report.

Google is your best friend. Why not use that? As I said before: if Federal have not released the test results, it is highly unlikely that any of us would have them, since (I'm presuming) that it would be protected information for use by those only involved in the bidding process for contracts.

I did a quick search myself and found this, which might be of interest to some.

http://www.american-comm.com/ansi.html

By the way, the official ANSI S12.14 document is US$90 if anyone wants to grab it.

Justin: My company has serviced, supplied, maintained, installed, and manufactured sirens for ove 50 years and I thought I knew everything about sirens until I got on this site and it is very humbuling to be "out knowledged" by people on this site. What I was trying to say is, if the people on this site do not know it did not happen or it does not exist.

Moving forward I still maintain that Federal never tested the 2001-130 and my reasoning is the test results in this post were turned in with the bid of 2009 and in the next bid of 2010 it was left out of the specs all together.

In summary when a bid spec asks you for the test results of the siren you are offering and you include 8 year old testing results from a different siren, you have in my opinion lied to the same people you are trying to protect.