Passing planes and other whoosh sounds

> it's like the pitch goes down at first, but when the plane has passed us, the pitch goes up again. That's not how Doppler works!

Call me a dummy, but this was exactly how I thought Doppler works.

Let's say the mistake is understandable, because it happens to coincide with the observation of a passing jet. ;) I guess that's why Doppler explanations nearly always use an ambulance as their example.

As a sound comes towards you (say an ambulance) the sound waves arrive squashed (higher pitch) and as it goes away the sound waves are stretched (lower pitch).

The jet example will needlessly confuse people and create fodder for low effort "akshually" type commentary because the air getting sucked into the front and crammed out the back of the engine sound very different so you can get like most the same effect without the aircraft actually moving relative to the observer.

People explaining doppler don't want to have to explain this to a bunch of nit pickers, so they use an ambulance.