Siren

If you direct an air flow onto a rotating disk with holes, a sound may be heard. Explain this phenomenon and investigate how the sound characteristics depend on the relevant parameters.

   將氣流引導到一個帶孔的旋轉盤上時可能會聽到聲音。請解釋這一現象并研究聲音特性如何依賴相關參數的。