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Chicago Air Raid Siren System DOCUMENTS FOUND!

So a few nights ago, Logan (Tbolthurricane on Yo[…]

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North Vancouver, BC siren test from 1976

Wow.......creepy

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Lowest mounted Siren in US

https://goo.gl/Va3hzn

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Ultra-HyperSpike Compact Omnidirectional Speakers

Speaking of HyperSpikes, it seems that there is at[…]

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