Why is there a whistling sound when a car travels over a concrete bridge?
In: Physics
When tires travel across different types of pavement they make different noises. Asphalt and concrete sound different because they are different hardness and the way the tires flex as they roll over create different pitches. In addition some places seal the bridge decks to keep water out. This sealant is yet a different hardness and therefore a different sound.
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