system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Can a pilot traveling faster than the speed of sound hear his own engines behind him?

I'm guessing he'd feel the vibrations and the vibrations might make some noise, but does the pilot experience some sort of doppler effect from the engine noise as he approaches the speed of sound and then silence once he breaks the sound barrier?
gpt
A little.

The speed of sound in solids is faster than in air, so some of the engine noise will be conducted by the plane itself.

> does the pilot experience some sort of doppler effect from the engine noise as he approaches the speed of sound and then silence once he breaks the sound barrier?

Yup.  The engine noise would get progressively quieter and lower as his speed increases.