How is a human whistle a pure sine wave?

1. Is a whistle a pure sine wave?
2. What is the frequency of a human whistle?
3. What kind of a wave is a whistle?
4. What are the physics of whistling?

Is a whistle a pure sine wave?

Whistling produces a loud and pitched sound that approximates a sine wave. These sounds travel well over large distances [1] and are easy to discern from other biological sounds by the rare occurrence of pure-tone sine waves in nature.

What is the frequency of a human whistle?

The frequencies generated by whistling (2–4 kHz) are resistant to degradation and can be intelligible at a distance 10 times greater than shouted speech (6).

What kind of a wave is a whistle?

Whistler waves are a type of natural plasma waves with frequencies below the electron cyclotron frequency.

What are the physics of whistling?

Air enters the whistle at one end. As the air reaches the other, closed end, all the air molecules "pile up" on top of each other and cause a high-pressure region. The air escapes out the little hole in the end, making the noise you hear.