If a wind is blowing from a siren toward your ear, does the frequency of the siren change? Why?

The frequency of the wave stays the same.

Explanation:

As the wave is moving in an air medium throughout its whole journey and the time is constant, the frequency stays the same

Answer: NO

The frequency of the siren doesn't change because there is no motion of the siren toward your ear

Explanation:

frequency is the rate at which a vibration occurs that constitutes a wave, either in a material (as in sound waves), or in an electromagnetic field (as in radio waves and light), usually measured per second.