Ambulance and fire engines have emergency sirens. why ?
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Fire/EMS Sirens and Speakers. Whether you are looking for an ambulance siren or a fire truck siren, Federal Signal has you covered.
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A siren is a loud noise-making device. Civil defense sirens are mounted in fixed locations and used to warn of natural disasters or attacks. Sirens are used on emergency service vehicles such as ambulances, police cars, and fire trucks. There are two general types: pneumatic and electronic.
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