system
Given the following post, respond as if you're commenting on Reddit:
human
If you move away from a sound source at the speed of sound, do you hear the same note constantly?

For example, if you were moving away from a sound source playing a song, would you hear the same exact point of the song until you were too far away for it to be audible?
gpt
You wouldn't hear anything as there would be no relative pressure change.  If there was a very small difference in speed you still wouldn't hear anything as the frequency would be much lower than the human ear can detect.