The Siren Board

Discussion of Outdoor Warning Systems
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PostPosted: Mon Dec 02, 2019 5:09 am 
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Real Name: Alex
YouTube Username: Tornado Sirens
Hello i have a question what is the radius a ACA P-15 and a Whelen 2903 can be heard from working on the radius of sirens in my town and cant seem to find the answer. Thanks


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PostPosted: Tue Dec 03, 2019 7:13 pm 
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Joined: Mon Nov 14, 2016 11:31 pm
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Real Name: Adam
YouTube Username: Nudgy
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Location: Michigan
Alex,

It really depends on your city, there could be a lot of variables, like how flat your city is, how many trees are there, and even how the weather conditions are. I would give a P-15 probably a one-mile, or maby two-mile radius, give or take. As for the 2903, maybe a half-mile, to a mile. Electronic sirens are not as powerful as mechanical. Especially with only 3 cells. That this varies with each siren, and how your land is. The best way to find the radius is to drive about a mile out and see if you can hear them, if yes, go father out, if no go father in and that'll give you your answer. Anyone else on the board is welcome to correct me.

-Nudgy (Adam)

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PostPosted: Tue Dec 03, 2019 8:41 pm 
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Joined: Wed Apr 17, 2019 3:35 pm
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Real Name: Jack Rodgers
YouTube Username: Sirokat
A P-15's coverage radius is approximately 5440ft. The 2903 is approximately 3000ft (according to Whelen). This is using the 10db loss per distance doubled thingy. This simulates an average summer day, with little to no wind interference and little structural interference. I made a chart ranging every decibel rating's coverage radius. From 98db (Screamer S-2) to 135db (P-50). Here is that for those who need it!
-
98db - 720ft-----111db - 1760ft-----124db - 4480ft
99db - 760ft-----112db - 1920ft-----125db - 4800ft
100db - 800ft-----113db - 2080ft-----126db - 5120ft
101db - 880ft-----114db - 2240ft-----127db - 5440ft
102db - 960ft-----115db - 2400ft-----128db - 5760ft
103db - 1040ft-----116db - 2560ft-----129db - 6080ft
104db - 1120ft-----117db - 2720ft-----130db - 6400ft
105db - 1200ft-----118db - 2880ft-----131db - 7040ft
106db - 1280ft-----119db - 3040ft-----132db - 7680ft
107db - 1360ft-----120db - 3200ft-----133db - 8320ft
108db - 1440ft-----121db - 3520ft-----134db - 8960ft
109db - 1520ft-----122db - 3840ft-----135db - 9600ft
110db - 1600ft-----123db - 4160ft
-
I hope you find this useful!

_________________
15 year old enthusiast from Columbus, Ohio
Proud owner of:
- Federal Electric Model 2 (damaged)
- Federal Electric Type A
- H.O.R. Si-Rex S1
Looking for some new siren buddies!


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