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American Signals is one of the leading manufacture of sirens. They also make the LOUDEST siren currently, the T-135.
This siren kicks tail at 135 decibles. A Boeing 737 engine is ONLY 1 decible higher than the T-135!!! They also manifacture
the T-128, C-125, T-121, T-112, and the Alertronic Series.
>>> Click to hear a T-135
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