Why sine wave is the natural wave, why not something else?
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A sine wave is the shape you get when tracing the change in y per unit of a circle.
This is not the same as cutting a circle in half and making one long wave, as the x axis does not move continuously.
Starting at the center of the circle, you approach the top, the bottom, and return, where the line traces a perfect circle of X radius.
Other waves can have the same wavelength but higher/lower amplitudes. These are explained with different mathematics.
These waves can be combined into one signal, which will add and subtract all the wave components into a new shape, these can be random wobbles or make shapes like triangle waves and square waves.
However, these require a combination of forces, and are difficult for men to replicate, even if they are found in nature, as they are a complex combination of other more simple forces.
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