system
Given the following post, respond as if you're commenting on Reddit:
human
Since heat is vibration of atoms and sound is the same, then why can't we hear something when something is hot?
gpt
Heat is the random motion of atoms, while sound is (relatively) large-scale, organized volumes of slightly higher and lower pressure/density. Your ear can hear sound because it's the collective motion of large numbers atoms on spatial scales (the wavelength) similar to your ear. The spatial scale of the random motion due to heat energy is on the order of a single atom.