Why do spinning objects make audible ‘woosh’

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Why do spinning objects always seem to make some sort of higher pitched ‘woosh’? Why does a bendy tube make weirder tones compared to just spinning a rope? Why does drag create noise?

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Anonymous 0 Comments

>Why does drag create noise?

Noise is air being moved.

Something moving through the air, will also move the air. [A visualization of air moving around a sphere.](https://www.researchgate.net/publication/260045652/figure/fig7/AS:671505998417924@1537110914476/Smoke-visualisation-and-flow-topology-of-the-airflow-around-a-cylinder.ppm)

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