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Wind Whistle is a bicycles accessory to generate sounds during riding. Pedestrians or other riders will sense the sounds to be aware of distance in between to avoid accidents. In compliance with of Bernoulli's law, the whistle generates sounds and itself is a resonance cavity. As speed increases, sounds become louder. Turn 90 degrees of whistle to shut off whistle.
National Cheng Kung University
Tainan City, Taiwan
Chang Yu Pan
Kaohsiung county, Taiwan