The Siren Board

I hope I don't have to go back and edit every Thunderbeam I've ever mapped...I think you all get the point, though, so it should be good.

Goldsby
Red - P-15
Yellow - Thunderbolt

200th post!

Owasso Map
16 HPSS 32
4 2T22
1 EOWS 1212


Collinsville
3 WPS-4000


Davenport
2 3T22

kswx29 wrote:

Oldiesmann wrote:Federal rated the Thunderbeam at 128dB: http://www.jmarcoz.com/sirens/sc5.pdf. Siren Central on the other hand rates it at 121dB: http://www.sirencentral.com/asp_pages/s ... 348&PCA=61 and http://www.sirencentral.com/asp_pages/s ... 344&PCA=61

I think it is 121db, I usually give Thunderbeams .920 mile radius as I used to live a little under a mile from a Thunderbeam and heard it routinely.

EDIT: Also, I think Claremore uses their Thunderbeams as a "Backup" incase the whelens fail.

Federal commonly falsely advertises decibel ratings as many of us know.

The 2001-130 actually only seems to put out 127 like the older models.

I remember seeing a Thunderbolt 1003 brochure that rated it 124-140 decibles, but it seems like out of every Thunderbolt, only 125 comes out.

I think I've also seen brochures for the EOWS 408 and 812, the 408 was rated 128 decibles, and the 812 was rated 132 decibles. According to Dane County, WI's siren list, they only got 124 out of the 612s, and 115 out of their 1212s, so the 408 and 812 were definetly falsely advertised.

Ah, I wasn't aware of that. Thanks for sharing! But like I said for the most part, as in the case with Thunderbeams and STH-10s, I give them coverage for how far I have heard them good.

I tend to give sirens the same radius if they have the same internals. Is that correct? For example, the RSH-10 and the STH-10 both have .920?

dilloncarpenter wrote:I tend to give sirens the same radius if they have the same internals. Is that correct? For example, the RSH-10 and the STH-10 both have .920?

Well the Thunderbeam projects the siren out so doesn't that make the sound travel further? I believe the Thunderbolt uses the Model 2s chopper or something doesn't it? Interesting way of putting it tho!

I guess if the siren was directional, the sound would be sorta compressed instead of spread out, making it louder. Hmm...haven't really thought of it much.

carexpertandy wrote:

kswx29 wrote:

Oldiesmann wrote:Federal rated the Thunderbeam at 128dB: http://www.jmarcoz.com/sirens/sc5.pdf. Siren Central on the other hand rates it at 121dB: http://www.sirencentral.com/asp_pages/s ... 348&PCA=61 and http://www.sirencentral.com/asp_pages/s ... 344&PCA=61

I think it is 121db, I usually give Thunderbeams .920 mile radius as I used to live a little under a mile from a Thunderbeam and heard it routinely.

EDIT: Also, I think Claremore uses their Thunderbeams as a "Backup" incase the whelens fail.

Federal commonly falsely advertises decibel ratings as many of us know.

The 2001-130 actually only seems to put out 127 like the older models.

I remember seeing a Thunderbolt 1003 brochure that rated it 124-140 decibles, but it seems like out of every Thunderbolt, only 125 comes out.

I think I've also seen brochures for the EOWS 408 and 812, the 408 was rated 128 decibles, and the 812 was rated 132 decibles. According to Dane County, WI's siren list, they only got 124 out of the 612s, and 115 out of their 1212s, so the 408 and 812 were definetly falsely advertised.

Federal Signal has all siren units tested by an independent sound lab, so there is no false advertising. It's well known that some companies change their output overnight with no reason, usually after a competitor had a recent db increase.

FederalSignalGuy wrote:

carexpertandy wrote:

kswx29 wrote: I think it is 121db, I usually give Thunderbeams .920 mile radius as I used to live a little under a mile from a Thunderbeam and heard it routinely.

EDIT: Also, I think Claremore uses their Thunderbeams as a "Backup" incase the whelens fail.

Federal commonly falsely advertises decibel ratings as many of us know.

The 2001-130 actually only seems to put out 127 like the older models.

I remember seeing a Thunderbolt 1003 brochure that rated it 124-140 decibles, but it seems like out of every Thunderbolt, only 125 comes out.

I think I've also seen brochures for the EOWS 408 and 812, the 408 was rated 128 decibles, and the 812 was rated 132 decibles. According to Dane County, WI's siren list, they only got 124 out of the 612s, and 115 out of their 1212s, so the 408 and 812 were definetly falsely advertised.

Federal Signal has all siren units tested by an independent sound lab, so there is no false advertising. It's well known that some companies change their output overnight with no reason, usually after a competitor had a recent db increase.

+1 for you my good man.

FederalSignalGuy wrote:

carexpertandy wrote:

kswx29 wrote: I think it is 121db, I usually give Thunderbeams .920 mile radius as I used to live a little under a mile from a Thunderbeam and heard it routinely.

EDIT: Also, I think Claremore uses their Thunderbeams as a "Backup" incase the whelens fail.

Federal commonly falsely advertises decibel ratings as many of us know.

The 2001-130 actually only seems to put out 127 like the older models.

I remember seeing a Thunderbolt 1003 brochure that rated it 124-140 decibles, but it seems like out of every Thunderbolt, only 125 comes out.

I think I've also seen brochures for the EOWS 408 and 812, the 408 was rated 128 decibles, and the 812 was rated 132 decibles. According to Dane County, WI's siren list, they only got 124 out of the 612s, and 115 out of their 1212s, so the 408 and 812 were definetly falsely advertised.

Federal Signal has all siren units tested by an independent sound lab, so there is no false advertising. It's well known that some companies change their output overnight with no reason, usually after a competitor had a recent db increase.

Federal had a very bad habit of inflating the ratings on sirens in the 70s and 80s.

The thunderbeam's output was a fib also. There is no way that design could outperform or equal the output of a RM-127 or the 500AT it replaced.