Alarm system suggestions

[Graham]

Ha ha
I agree about nobody listening to sirens -

.
.
Now there are sirens, sirens and there are sirens

Some super duper 138 decibel sirens are sure going to attract a lot of attention.

http://www.victorysiren.com/x/howloud.htm

or maybe a little too loud.

Effective Distance
Commercial / Industrial 80 dB 1 Mile
Urban Residential 70 dB 2 Miles
Residential 60 dB 4 Miles
Suburban Residential 50 dB 8 Miles
Rural 40 dB 16 Miles



How about some thing like a compressed air cylinder, directly to a train horn ?????????
No need electrics.

Gra.