Ignore the idea that the plane and it's sound are in different locations ... The key to understanding this phenomena is that there seems to be a greater discrep

Ignore the idea that the plane and it's sound are in different locations ... The key to understanding this phenomena is that there seems to be a greater discrepancy the further YOU are from the plane. Ignore the planes sound and consider the case where someone on the plane set off a firecracker. When you hear the sound from the firecracker,the plane will have moved away from that point!