system
Given the following post, respond as if you're commenting on Reddit:
human
Is there a maximum frequency sound that air can support? What happens beyond that point?
gpt
In air, molecules go 68&thinsp;nm between collisions on average.  The speed of sound is about 330&thinsp;ms^-1.  Dividing gives 4.8&thinsp;GHz.  That's the absolute limit though; you're not going to see practical transmission anywhere near that high.