Eli5: Why are truck horns so much louder than car horns?

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Also I’ve noticed, at least in Australia. Bus horns are quieter than truck horns.

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6 Answers

Anonymous 0 Comments

Large trucks often use a compressed air system to power their brakes.

Someone thought, “hey, we got this compressed air lying around, let’s stick a horn on it!”

And lo, the truck gained a giant overpowered horn.

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