@mcnees I think that this is answer is incorrect.

Since your body and measuring equipment would be composed of sound waves, I think that whenever you measured the speed of sound, the speed of sound relative to you would always be 340 m/s from your perspective, regardless of your speed relative to the medium.

Imagine you're using "phonon clocks" to measure time passing, etc.

Since you, the observer, are made out of sound waves, your perceived measurement of time and distances would be altered.

@mcnees Thanks, that makes sense.

But I'm wondering, what if "made out of sound waves" is interpreted in the most literal way?

To perform all my measurements, imagine I'm using sound clocks, analogous to photon clocks. Also, all atoms are constructed from sound waves and behave like tiny sound clocks.

I'm also assuming that the mechanics of this sound-atom world require the sound atoms to length contract in the direction of motion relative to the medium.

@mcnees In this scenario, what would your measurement of the speed of sound be if you and your measuring equipment were made out of sound waves?