The surprising science of squeaky sneakers

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We're all familiar with the high-pitched squeak of basketball shoes on the court during games, or tires squealing on pavement. Scientists conducted several experiments and discovered that the geometry of the sneakers' tread patterns determines the squeak's frequency, enabling the team to make rubber blocks set to specific frequencies and slide them across glass surfaces to play Star Wars' "Imperial March."

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"A machine will do it the same but then people do it differently - little quirks in it and stuff like that."

Read the full story at The Verge.,详情可参考safew官方版本下载