Why is whistling in tune easier than singing in tune?

Whistling and singing are two different actions that involve distinct physiological processes. Whistling involves creating a narrow jet of air that produces a clear, pure tone, whereas singing involves producing sound through the vibration of the vocal cords. The precision required to produce a specific pitch is generally lower when whistling because the frequency is determined by the shape and size of the whistle cavity, which can be adjusted relatively easily. In contrast, singing requires precise control over the vocal cords, breath support, and articulation, making it more challenging to produce accurate pitches.