Re: Why don't we hear things that are really heated?

Hi MIndy,

Well, not exactly. There are similarities between heat and sound, but they aren't quite the same thing. Heated fluids (i.e. air or water) do generate sound. Most of it likely occurs at frequencies outside the range of human hearing, however, so we don't always hear it. To be considered sound, the vibrations need to travel away from the source in a regular way (click here for more on sound). Heat vibrations can be completely random.

This is a very topical question, by the way. Here's a link to an article on recent research in the area.

I hope this helps.
Cheers,
Tetjana