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by chillycharlie
Mon Feb 15, 2016 2:11 am
Forum: Other Warning Systems - Indoor, Outdoor and Vehicular
Topic: Have vehicle sirens change since the 70s?
Replies: 1
Views: 3467

Have vehicle sirens change since the 70s?

I was wondering how the sound levels of vehicle sirens have changed since the 1970s. Are they essentially the same? The only difference being the different siren wails and newer technology to make them more reliable?

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