Question

What properties of sound determine the pitch of sound? How is this affected by motion of the sound source? Be specific.

Answer 1

@blurbendy

Answer 2

The frequency, or wavelength. When a sound is produced its wavelength will approach you at different frequencies. if you're far away, then you won't hear the sound as well because its wavelength won't be "hitting" you as frequently. If you're close, then you will be "hit" by the sound wave more frequently.