5. Whistling Mesh

When a stream of water hits a rigid metal mesh within a range of angles, a whistling tone may be heard. Investigate how the properties of the mesh, stream and angle affect the cha­rac­teristics of the sound produced.

当水流在一定角度范围内冲击刚性金属网时，可能会发出口哨声。研究金属网、水流和角度的性质如何影响产生的哨音的特征。